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HIV – Understanding the Window Period
The HIV window period often is the cause of a lot of confusion. There is a lot of information on the web throwing up numbers like 3 months, 6 months even 1 year. So what exactly if the HIV window period?
To better understand this, let us take a step back in time to when HIV was first discovered. At the same time, learn a little about how our immune system works.
The HIV virus was discovered in 1983. Prior to that, it was not known what was causing the disease known as AIDS that was ravaging certain communities in the world.
After scientists discovered the existence of the HIV virus, they had to find a way to determine if a person has this virus in his body or not.
In 1985, they developed a test called ELISA which is based on a very basic principle of how our immune systems work.
When our body is attacked by a virus, it will produce anti-bodies to fight the virus. Anti-bodies are unique. The anti-bodies used to fight HIV would be completely different to the ones used to fight dengue, for example, or any other virus.
So finding HIV anti-bodies in the body is indirect evidence that there is HIV virus in the body too. The ELISA test does exactly that. It tests for the presence of HIV anti-bodies.
Imagine each virus infection is a fire that starts in the body. Each of these fires produces a uniquely colored smoke. When we see a particular colored smoke, we assume that there is that particular type of fire burning away. The ELISA tests for HIV colored smoke but does not detect the fire itself.
But there was one big problem. It sometimes takes the body a long time before the body produces enough anti-bodies to be detected by the ELISA test. In other words, the fire has to burn for a long time before it produces enough smoke that can be detected by ELISA.
This period when a person is infected with HIV and the ELISA test is unable to pick it up (the period when the fire is burning but there is no smoke) is called the window period.
This was correctly recognized to be a very important finding and rightly so because a person infected with HIV within the window period can get tested and be told he does NOT have HIV. He will then not take steps to protect himself and the people around him thus increasing the risk of spreading the disease.
Scientist has ever since been working on improving and coming up with new and better testing techniques and technology. There are now multiple different tests for HIV including ELISA, Rapid Tests, Western Blot, RNA PCR, DNA PCR and P24. There are also multiple different manufacturers of each test. All of these tests have their own rates of accuracy, window periods and applications in the management of HIV. To make things even more confusing, there are also tests for indirect evidence of HIV infection like CD4 cell count and CD4 CD8 cell ratio.
So when you read somewhere or someone tells you that the window period for HIV is X number of months, your next logical question should be ‘by using which test?’
To know which test done when has what accuracy requires a lot of professional knowledge. This information is also constantly changing as more and more research information is published. There are also other considerations such as waiting time, anonymity, costs etc
It is still best to speak to your doctor or someone trained in HIV counseling and testing to find out which test is most appropriate for you.
One thing remains constant. If you are at any risk of HIV at all, no matter how minute, you MUST get tested. But as for which test to do and when to test, it is still best to speak to a medical professional trained in HIV matters.
Feel free to email your queries, feedback and suggestions on what other topics you want to see on this site. Just click on the email tab on the top of this page. All emails are treated with the utmost confidence.
About Dr. Tan
Dr. Tan graduated from the National University of Singapore in 2001. His residency was in the two largest public hospitals in Singapore; Tan Tock Seng Hospital and Singapore General Hospital.
Dr Tan,
I had a minor surgery done in Beijing (removing a boil) and I am worried that I could have contracted HIV. This surgery was done on 18 June 2011. I return to Singapore on 5 August 2011. What test do you offer and when is the earliest I can take the test to get a definitive result? Do you or any other clinic in Singapore offer the 28-day HIV duo (Antigen/Antibody) test? I do not have any other exposures. Thank you.
Cheers,
Ricky
Hi Ricky,
5th August will put you at 7 weeks post exposure.
At this point in time, it is actually not worth your while to do the DUO test.
The HIV P24 peaks between 3 to 5 weeks post exposure.
You should just take the Rapid HIV Antibody test.
Although the officially described window period is 3 months, statistically the vast majority of patients can be picked up at 6 weeks.
Dr Tan
I’m freaking out about an exposure I had. 9 days ago I was exposed to a sex worker. She gave me unprotected oral and licked my anus. My anus had a fissure that I’ve always had since a kid but regardless it’s an open cut per se. What are the chances of contracting HIV this way? I am taking a dan pcr Monday and supposably std alert claims it is 95 percent accurate then. I saw my doctor he is also giving me a antibody test. Please please please advise. What is the risk here??
Dear Dr Tan,
I had protected sex with a woman having an unknown hiv status the 4th of september 2011.
She was sex worker (maybe just for the occasion, but still).
The condom broke at the end.
I got tested the 5th of september with HIV 1-2 Ab/Ag 4th generation Architect (abbott)
Same test 30 days after the possible exposure
Last test (same test) 99 days after the possible exposure (december 2011)
All the tests came negative….
I had several of what I thought could be classical symptoms during this period …. Then everything disappeared….
Now, It is nearly one week that I have unusual joint and muscle ashes, I had a bit of diarrhea and stomach/abdomen disorders…. Maybe just a cold… But…
Do you think there are any chances that those feelings maybe HIV related and that I Had a very long window period ?
Do you think I should re-test again ?
PS: I had no other risks of exposure in the meantime
Thank you very much.
Best regards
Mike
Hi Mike 74,
Your tests are conclusive. You do not haven HIV. There is no need to do anymore tests. Something else is causing your symptoms. See your doctor to get to the bottom of it.
Rgds
Dr Tan
dear doc
3 days ago i have exposed to a sex worker but protected with a condom.
i have to say also that i have genital warts.
my concern if ther is any risk factor due to warts which might facilitat hiv transmision.
should i go for some kind of test later on?
thanks a lot.
Hi khal khal,
Kudos to you on using a condom. But you must remember that condoms are not 100% effective in preventing HIV. The presence of HPV infection does increase the risk of HIV infection. You definitely should test for HIV and other relevant STDs. Please see a doctor for more detailed advice.
rgds
Dr Tan
thanks for clarification
shoud i run combo test after 28 days as a first test,or do you recomend other?
by the way i have exposed to the same sex worker 4 monthes ago and i made test after 3 month came nigative.
dose that mean some thing?
it was really terrifinng 3 monthes till i got the last test.
now am i going to go for another killing time?
Hi khal khal,
The best test to do at 28 days is the combo test. It means you did not catch HIV from the last exposure.
Rgds
Dr Tan
i was encounter the hiv positive gal on march 2011 i used the safe condom for intercouse n give her lip kiss n sucked the boobs n she sucked my penis with out condom i take my hiv report on novomber n jan 2012 for a 4 time all reports r neg it is possible to have hiv after that reports
Hi indian,
You do not have HIV. Please stop worrying.
rgds
Dr Tan
thanx a lot doctor
Hi indian,
You are welcome.
rgds
Dr Tan
i was encounter the hiv positive gal on march 2011 i used the safe condom for intercouse n give her lip kiss n sucked the boobs n she sucked my penis with out condom i take my hiv report on novomber n jan 2012 for a 4 time all reports r neg it is possible to have hiv after that reports pls help me sir
Hi Dr.Tan,
Before two days I had sex with girl with unknown HIV status.
I licked her body and I put my hand in her vagina. I don’t have any scar on my hand except that my nails are very short (I nibble my nails), and maybe some damages of the skin around my nails .
We had sex three times with condom, but on third time when my penis lost erection I also lost the condom, so my penis was not erected, but he was in constant contact with her vagina (penis was not inside the vagina) it was only rubbing her vagina, she was on top on me.
Because I was so scared, I was at the doctor and I told him that I need PEP (Combivir).
I already started with PEP (after 36h), but now I am not so sure that I need PEP, but for safety reason should I continue with PEP or not?
What if I stop with PEP after couple of pills, or before 28 days was finished?
Does it have some possibility that I will get some other health problems later from taking the Combivir?
What do you think I was exposed on HIV or no?
Should I continue with Combivir or not?
How long I should wait for making HIV test?
Does Combivir extend Window period?
Thank you,
Hi Scared,
Please return to the doctor who prescribed you the PEP and ask him/her your questions. It is very unprofessional of me to interfere with a colleague’s management of a patient.
rgds
Dr Tan
I just received unprotected oral sex with a sex worker she suck my penis but i didnot ejacuated in her mouth.after 71 days i.e.10 week after i did tri dot card method test for a registered pathalogy lab,they took blood with a syringefrom my arm. it came negative.i did hepatitis B and hepatitis A and C test also all came negative.IT this conclusive.PLZ help Dr.
Hi eric indian,
The tests are very reliable but I am unable to say it is conclusive. Please repeat a test at 12 weeks.
rgds
Dr Tan
hey doctor this is my details of test hiv duo by cmia (1V the generation ( non reactive (0.43) hiv p24 antigen dectection serum by elifa (negative) human immunodeficiency virus type 1 (hiv-1) rna qualitative (detection)-cobas taqman result not (detectable )all this test i have done after three months of target any possible after this test i have to do more test pls doctor tell me
Hi RAJ,
Please tell me why you do not ask the doctor who did the test for you. Your tests are conclusive, you do not need anymore tests.
rgds
Dr Tan
hey sir there is any possible that there is any change to get hiv after these test
Hi RAJ,
I have answered your repeat questions ad nauseum. I am going to draw the line here. Please direct all future questions to your local doctor.
Dr Tan
My name is Messi,I need your undertanding on a hiv test named eclia
ag/ab for hiv 1 and 2 ag is just for hiv 1.I took the test at 3 months
mark.My question is the reliability of the test result since it is an
eclia test instead of the more common one which is the elisa,and can I
be sure that I am negative from this test?Should i get teated again
with elisa.(the elisa states ag/ab and p24 but the lab technician say its a3th gen test,I thought it should be a 4th gen test) and should i retest at 6 months ad many doctors I see in kuala lumpur said so,probably because of delay seroconversion which i heard is an urban myth or my antibody hasnt been produce.Thanks your opinion is much appreciated.
Regards
Messi
I forgot to add that I had a chronic pharyngitis fir almost 2 months and its getting better,and my go reassure me that it is not due to ARS.I never had pharyngitis this long.Regarding my exposure it was a brief protected sex and unprotected oral.
Sorry for the typo
fir = for
go= gp
Hi messi,
A HIV antibody test done at 3 months post exposure should be accurate. Your doctors in KL must have good reason to believe that you could have delayed serocnversion and therefore recommended a test at 6 months post exposure. You really should listen to their advice.
rgds
Dr Tan
They did not say that I might have delay seroconversion its just a general saying eg they said well some people might produced antibodies up to 6 months.I told them i had 6 antibody test for the past 3 months and they said your anxiety is driving you crazy and test at 6 months if I want,thats the reason i asked from a std and hiv expert like you how confident are you with the elcia ot elisa test at 3 months.I will be honest here all of the doctors I have seen doest have much clue about the window period and hiv.
And what do you make of the chronic pharyngitis,do you agree with my doctor that it is not related to ARS and if it was the test would have tested positive.Thanks
My final thought and questions:
1) Can you clarify the Eclia test I have taken is it reliable compared to Elisa?
2) I have taken 6 antibody test and the last one was 14 weeks past exposure.How do you conclude this as I have seen so many of your comments stating mass majority will test positive within 6 weeks and 3 months is just to make sure.What about the possibilities of these people have delay seroconversion?
3) regarding my pharyngitis do you agree with my doctor?can pharyngiti or sinus delay antibody test or effect the test.
I would be glad if you could answer all of these questions.Thank you so much
Hi messi,
1. Yes it is. 2. This forum is not a substitute for a formal medical consultation. I have to make many assumptions when I provide information on a person’s case. One of the assumptions I make is that there is no reason to suspect that a person has any medical conditions or are on any medications that can potentially cause a delay in seroconversion unless they specifically mention it. So unless you tell me you have some serious medical condition that can potentially cause a delay in seroconversion, I do not see why this is a concern. 3. I cannot tell you what is causing your pharyngitis. It is impossible to make any kind of medical diagnosis via the internet. Pharyngitis and sinusitis in itself has not been know to cause a delay in seroconversion.
rgds
Dr Tan
Sorry before i leave this forum how common is it to have a chronic pharyngitis for 2 months I went to ENT and they said it is nothing just drink a lot o water and gargle it with salt,this is part o the reason i took the antibody test at 3 plus month period,because i was a bit paranoid,and do you agree if it is due to hiv my test would have been positive.sorry to bother you doctor.this would be my last thread.thanks
Hi messi,
You really need to trust your doctors more. You think that your ENT doctor will tell you it is nothing if they have any reason to suspect something serious? You really think your doctor can be so unprofessional? I do not know how you are going to do it but you really need to pull your head out of this HIV trap.
Dr Tan
And regarding your assumptions I dont have any serious medical conditions or taking any drugs except for antibiotics for my pharyngitis and the only medical condition i have is chronic pharyngitis
Hello Dr. Tan!!!
i went for the first time to a sexworker….
i have stroked the vagina of a sex worker…i was not with my fingers in the vagina! just aoutside…..but then i touched my penis with my hand…..my fingers were not wet of vaginal fluid….al so i had a little cut on the out side of the hand..it was not bleeding….
i after 30 sek. or 1 minute….i cancelled because i notized that im making a mistake… im not the type for sexworker…..
so we had no sex….
1st week several ARS symptoms started at 2nd weeks there were more heavely until 3 week. since 3rd week they begann slowley to disapear
I made a antibodie test at 10 days after exposure
and a antibodie+p24 test at 6 weeks (41 days) both were Negative!
how are my chances to be nagative at 12 weeks?
and if Symptoms disaper does that mean that antibodies where produced? before i did my test at 6 weeks i didnt have symptoms for 1,5 weeks…does this mean that the 6 week test normally have been detective antibodies at that time? sorry for my bad english….
Thank you very much.
Greetings from Germany
Hi panicman,
Greetings from Singapore to Germany. You guys make a lot of beautiful cars. Your exposure carried literally no risk of HIV infection. I am not surprised that your HIV tests so far have been negative. In fact, I do not think you need HIV testing at all. I have absolutely no doubt that your test at 12 weeks will also be negative. I am 100% sure your symptoms have nothing to do with HIV. I hope you can stop worrying.
rgds
Dr Tan
Hello Dr. Tan
Thank you very much! I had almost all symptoms that you can find in the internet
i have 2 questions:
1. is a hiv antibodie+p24 test at 6 weeks (41 days) as good as conclusive?
2.when hiv symptoms beginn to disapear does that mean that antibodies are produced? and are they at that time detectebel by tests?
You are hellping so much people around the world…that is really fascinating!
May god bless you!!!
kind regards
Hi panic man,
1. Yes it is conclusive. 2. Symptoms tell us nothing. Don’t even bother looking out for symptoms. The fact is nobody knows if your symptoms are due to HIV or not in the first place.
Rgds
Dr Tan
Hi Dr. Tan
Thanks a lot for your advice!
i will do the test at 12 weeks just for peace of mind! I will post it right here! Test is in 5 weeks!
I wish you all the best!
rgds
Hi panicman,
I’m sure you’ll be ok. Looking forward to your good news.
Rgds
Dr Tan
Hello Dr. Tan!!!
i went for the first time to a sexworker….
i have stroked the vagina of a sex worker…i was not with my fingers in the vagina! just aoutside…..but then i touched my penis with my hand…..my fingers were not wet of vaginal fluid….al so i had a little cut on the out side of the hand..it was not bleeding….
i after 30 sek. or 1 minute….i cancelled because i notized that im making a mistake… im not the type for sexworker…..
so we had no sex….
1st week several ARS symptoms started at 2nd weeks there were more heavely until 3 week. since 3rd week they begann slowley to disapear
at that time i lost hope to be nagative…
I made a antibodie test at 10 days after exposure
and a antibodie+p24 test at 6 weeks (41 days) both were Negative!
how are my chances to be nagative at 12 weeks?
and if Symptoms disaper does that mean that antibodies where produced? before i did my test at 6 weeks i didnt have symptoms for 1,5 weeks…does this mean that the 6 week test normally have been detective antibodies at that time? sorry for my bad english….
Thank you very much.
Greetings from Germany
Dr Tan,
I had vaginal intercourse with a sex worker with condom on. I just want to get tested. Can I take a p24 test at 4 weeks?
Hi Ben,
I am very happy to hear you used protection. By doing so your risk of contracting HIV and other STDs has been significantly reduced. Well done.
Yes. A P24 test at 4 weeks will be extremely accurate.
rgds
dr tan
where can i take a p4 test? does your clinic provide the test?
Hi Ben,
Yes. Our clinic provides the P24 Ag/Ab test.
rgds
dr tan
i had protected sex with a random lady in March 2011. i am concerned with my condition.
i had conducted 3 times of finger HIV testing from a government clinic(malaysia).
first time is in May, second time is July & the last time is end of the October. All result is Negative.
Is the result conclusive enough?
Hi concern,
Your test in October was 7 months post exposure and it was negative. This test is more than enough to be conclsuive. Please forget about HIV and move on.
rgds
Dr Tan
I Got diagnosed with genital herpes and had taken acylovir… And i have taken an hiv rapid test 3 months after exposer and was negative but i was wondering if the acyclovir i had taken has delayed the window period for hiv test? Please Help Doc im really scared!!!!
Hi adam,
Acycolvir will not affect the window period. You do not have HIV.
rgds
Dr Tan
Dear Tan,
I was exposed on 29 Oct 2011, i got test on 4 jan 2011(66 days), My quastion in same as the above. and my ELISA test is -ve, Please advice.
Hi kiran,
My dashboard does not allow me to see the questions in sequence so I really do not know what you mean by ‘same as the above’. At 66 days a 3rd gen ELISA is as good as conclusive.
rgds
Dr Tan
Dear Dr. Tan
I appreciate your service in helping people calm down their worries. I’m a family man and i’m feeling the guilt now. on 27th Nov 2011 around 12 AM I had a private lap dance at a strip club. The girl was topless and in her thongs. I had rubbed my face on her body( only above the navel) and as she was dancing there was sweat on her body. I did not have any type of sex with her.
on 3rd JAN 2012, 37th day or so I did my full blood test VDRL and HIV test using CMIA method for HIV1/2/P24 and all were negative.
My question are as below.
1. I had a 5cm skin peeled of on my neck 3 days before this incident during routine shaving. The wound was not deep and there was no bleeding. Am I at risk?. I did not see any blood on her body
2. She rubbed her bottoms on my thighs several times and I had ejaculated. After 15 min or so, I went to the wash room to pee. As she was only in her thongs, is there posibility of bodily fluids on my pants and there by I have contaminated myself
3. I had been to a spa on 5th JAN 2011 for a normal full body massage in malaysia. A 40 old woman gave me a massage using baby oil. I was on my underwear during the whole time and did not have any stype of sex. Later I came to know that the spa also offers sex services. The HIV test I did now, hope will clear of any infection.
4. for th first 2 points, AS window period is 3months, do I have to re-test for HIV again?
Thanks in Advance and God Bless.
RGP
Hi RGP,
1. Doesn’t matter. You tested negative already. 2. Again doesn’t matter. You tested negative already. 3. If having a massage puts you at risk of HIV then the human race is in real deep trouble. Seriously, there is no chance of HIV transmission from a massage. 4. No. P24 Ag/Ab combo is accurate at 37 days post exposure.
rgds
Dr Tan
Thanks for your comforting words. One more doubt, my blood was drawn at 8.30AM and it was tested at 3.45PM. Would that make any difference?. Do I need to take a re-test. Thanks.
Hi RGP,
You are asking about sample degradation. This takes weeks and months. A few hours make no difference at all.
rgds
Dr Tan
Dear Dr.Tan
With some many queries pouring in daily, not sure if would remember my case. For your reference , I had rubbed my face on a female strippers body and I had 5cms x 5cms of skin peeled off 3 days prior to this incident on my neck. My wound was not deep nor there was any bleeding and i did not see blood on the strippers body. At 37 days I did Architect p24 Duo combo test and it was negative. You had replied to my query saying I did not re-test. I met 3 doctors and 2 of them suggested that I have to move on and forget , while one of them suggested ELISA test. I had an ELISA Sandwich test (45th day) which again came negative. I seek your guidance on how to move forward and next course of action. In your experience would this 2 test be conclusive for my kind of exposure or have to wait 3 months. Being a family man,, I’m really worried. Kindly guide
Hi RGP,
Thanks for the recap. ELISA Sandwhich is also known as ELISA 3rd Gen. As far as I am concerned, these tests are conclusive from 6 weeks post exposure. SO you already have 2 conclusive tests for HIV. You really need to move on. I understand the stresses of being a family man. Wish you all the best and Happy Year of the Dragon.
rgds
Dr Tan
I’m freaking out about an exposure I had. 9 days ago I was exposed to a sex worker. She gave me unprotected oral and licked my anus. My anus had a fissure that I’ve always had since a kid but regardless it’s an open cut per se. What are the chances of contracting HIV this way? I am taking a dan pcr Monday and supposably std alert claims it is 95 percent accurate then. I saw my doctor he is also giving me a antibody test. Please please please advise. What is the risk here??
Hi John p,
There is literally no risk of you catching HIV. I’m sure all your HIV tests will be fine.
rgds
Dr Tan
I had vaginal intercourse with a sex worker with condom on. I just want to get tested. if there any test that i can take to know the result eariler … i am jus worried n confuse..
Hi dy,
Proper and consistent use of the condom greatly reduces your risk of HIV and other STDs.
You can refer to my post ‘ HIV Testing – FAQ ‘ for more information on HIV testing.
rgds
dr tan
Hi Dr Tan,
Thank you very much for your information, I´m 25 healthy man that had an unprotected intercourse with a female with unknown status. I haven´t had sex since then. I tested for HIV at 7, 9 and 12 weeks with Uni-Gold Recombigen at a Point of Care Centre all of them negative. Does this rapid test is accurate at 12 weeks? Do I need to test again to be definitive? Can I left behind that episode and move on?
Thanks
Hi Anton,
I am unfamiliar with the accuracy of Uni-Gold Recombigen.
As a rule of thumb, rapid tests are accurate at 12 weeks post exposure.
If your doctor is confident of the accuracy of the tests you did, you certainly should forget the episode and move on.
In the future, always remember to use protection to keep yourself safe.
rgds
dr tan
I had sex with condom on. But during the foreplay, I kissed my partner’s varginal area and I remember I used my tongue a little bit (only for a few seconds). I later realized that I have a gum infection in my mouth. But I kissed her varginal area way before the action started. Am I at risk? and if so, after how many days I should do a test and what test should I do? Kindly advise.
Hi Mathews,
Risk of HIV transmission via unprotected oral sex is extremely low.
Gum infection (gingivitis) does not increase the risk of transmission but ulcers in the mouth do.
Get a rapid HIV antibody test at 6 weeks post exposure.
rgds
dr tan
Hi Dr. Tan,
I was wondering if a negative result from a rapid hiv finger prick test done at planned parenthood at 5 weeks and 3 days after possible exposure could offer me any peace of mind? I know it is not conclusive until 12 weeks, but can I relax a little because of this result?
Thanks,
Jim
Hi Jim,
Rapid finger prick tests are very accurate. (assuming the test kit used is one of the approved brands)
A negative test at 5 weeks + 3 days scientifically and statistically speaking is already extremely (>99%) accurate.
However, you should still test again after 12 weeks to be 100% sure.
rgds
dr tan
I had an elisa test at 6 weeks and 4 days and it was negative i’v been crying cause i had a rash on my face and body and didn’t feel to good now i feel a lil better also had no chlymidia no gonnerea no syphilis but im not sure if he tested me for herpes can i have a soherric rash from herpes please help i’m really going crazy. Thank you.
Hi John,
Please take a deep breath and relax. Let’s review the facts: You do NOT have Chlamydia, Gonorrhea and Syphilis. So far so good. You had a negative HIV EILISA test at 6 weeks and 4 days. Very very good. So the only thing that is causing you do much distress is a rash that you assume is sebborhea and caused by Herpes? First of all seborrheic rashes have nothing to do with Herpes. Instead of scaring yourself silly, why don’t you go see a doctor and have your rashes properly diagnosed? Maybe you are right and all you have is seborrheic dermatitis.
rgds
Dr Tan
abt my last post i forgot to say that i dun know is the condom broken anot. So the test at the 4th weekis gd enough. Or i need to do it again on the 12 weeks. I had done a dna/pcr test on the 10th days after exposure . Is it gd enough toegther with the 4th week
Hi dy,
If you are unsure then it is better to assume that the condom broke.
A DNA PCR HIV test at 10 days post exposure is NOT sufficient for diagnosis.
A HIV antibody test at 4 weeks post exposure is NOT sufficient for diagnosis.
You need to have another HIV antibody test doen at 12 weeks post exposure.
rgds
dr tan
Dear dr tan,
I have taken the rapid finger prick four times, once every month post exposure. All four tests returned negative, as mentioned by the doctor who tested for me. Can I trust the results told to me verbally by the doc? Can I finally put the unfortunate episode behind me and move on?
Thanks alot dr tan.
Hi madeawrongmove,
There are a few issues here:
1. I assume your doctor conducted the finger prick test for you using one of the approved kits.
2. You tested 4 months post exposure and that is more than enough for the 3 month window period.
3. You can request for the doctor to show you the test and explain to you how to read the test and see that it is negative. In this way, you do not have to just rely on the verbal report by the doctor.
Lastly, yes, you can put this episode behind you. Please forget about it and move on.
rgds
dr tan
Thanks alot for your help dr tan. Cheers!
i just got oral sex with a prostitute with a condom, i am not 100% sure was it broken, after oral sex, follow by message for 15min, the next 2 days when i back, found my eye,nose abit itchy and body abit of itchiness as well,it last for 7-8days. do i have to go for any test? any recommend shortest test i should go as i am anxiety to know the result.
Hi kv,
If it is HIV you are worried about then please stop worrying.
HIV seroconversion symptoms do not come on so fast i.e. 2 days post exposure.
Oral sex with a condom has virtually no chance of transmitting HIV.
There are many causes of generalized pruritis (itching) e.g. Allergies, Urticaria, Kidney Disease etc. You should see your doctor to check these.
rgds
dr tan
dear docter tan i had a hiv rapid test done at 6 weeks it came back negative i know 12 weeks is conclusive but do you believe that my six week test is a good indication of what the 12 week will turn out to be my docter said he doesnt think i need more testing and doesnt advice me coming back at 12 weeks but wouldnt turn me away if i do decide 2 test again im scared 2 death i also tested at 2 weeks as a baseline so that the woman i had slept with cannot blame me so in your oppinion can i atleast start moving on or should i still be extremely worried
Hi untitled,
Your Doctor is right. Statistically and scientifically speaking, a rapid HIV test (using one of the approved test kits) done at 6 weeks is conclusive.
However, our Ministry of Health still recommends a re-test at 12 weeks.
In my opinion, you should start to move on. Test again at 12 weeks and tell yourself that will be the day you completely put this behind you.
rgds
dr tan
Thanx doc it means a lot to me…. Statistically speaking my 6 week puts me on the better side of it right:)and I’m going 4 a 9 week in 14 days/2 weeks again I know the 12 week is conclusive but this is for peace of mind. Again really helps being able 2 talk 2 some1 about this considering I’m only 17. And if u don’t mind I will be posting my results for the 9 week if negative I will test at 12 weeks if negative I will come celebrate here with a big thanks again means a lot:)
Please share your results with us. I am also looking forward to seeing you test negative at 12 weeks.
Please also remember to stay safe and always practice safe sex.
Dr Tan
well done … i hope i will be the same as you neg at the 4th week now waiting for my 5th weeks
Dear Dr. Tan, I had unprotected oral sex with a lady boy in thailand, i did the dual test ag+ab 80 days after the exposure, did not had any symptoms back then, but after 4.5 month i had skin rush, fever, nausea, vomotimg, backpain and sotr throat, do i have to do another test? Noting that i catched chlymedia and took the medecine for it, Please help
Hi Jimmy,
There are a few issues here:
1. The P24 Ag test at 80 days post exposure is not accurate. However, since the dual test also included the Antibody test, this is very accurate at 80 days post exposure.
2. HIV seroconversion symptoms do not accur so late i.e. 4.5 months post exposure. I’m sure your symptoms is due to something else and you should see a doctor for it.
3. You do not need to do another HIV test.
4. You should however re-test for Chlamydia if you had not done so. This is to make sure the medicines worked. This is known as a ‘Test-of-Cure’.
rgds
dr tan
Dr 12 days ago I received unprotected oral sex from a girl who status is unknown I am freaking out and plan to take the hiv DNA pcr test at 15 days I know the elisa test at 6 weeks is pretty much a standard but was wondering on the accuracy of the DNA pcr test at 15 days. Any response would be appreciated.
Hi durg,
The HIV 1 DNA PCR test at 15 days post exposure is not accurate. You should do the HIV 1 RNA PCR test. At 15 days post exposure the RNA test is as good as conclusive.
rgds
Dr Tan
Dear Dr.
I had an exposure on 24th Dec 2011, with a CSW. The incidents involved included,
1) Body rubbing. For some time the head of my penis touched her stomach.
2) General hugging
3) Protected hand job
4) Protected penile vaginal rubbing.
I got tested for HIV 1 RNA PCR at 8 days post exposure,
using COBAS Ampliprep and COBAS Taqman for HIV 1 RNA quantification. Detection range was from 20 – 10,000,000 copies/ml
The result I obtained was Below 20, not detected.
Do I need to do a RNA PCR qulitative test or a quantitative test at 17 days post exposure. Response would be well appreciated.
Hi flyover,
To start with, I do not think you need a HIV test in the first place. Assuming that you do, a RNA PCR test at 8 days is a touch too early. You should have it repeated. Better yet, save some money and just get the HIV antibody test done at 3 months post exposure. Its all just for peace of mind anyway. There is practically no way that you could have caught HIV from your ‘exposure’.
rgds
Dr Tan
Hey Doctor,
I had a HIV 1 qualitative RNA PCR done by COBAS Taqman+HIV DNA qualitative PCR , HIV DUO test done at 13 days post exposure and all results were negative.
My exposure:
1) Body rubbing
2) My penis head touching CSW’s stomach
3)Protected penile vaginal rubbing
4) Protected hand job
For a few seconds the CSW did touch my penis unprotected.
Do you think I need to test again?
Hi flyover,
No you do not.
rgds
Dr Tan
Thanks Doc
Dear Dr Tan,i had unprotected sex with a guy who lie to me showing me a paper saying he was hiv negative.i had a bit of blood and he came inside…five weeks later he phoned me and show me that he was hiv positive..im so scared
on fith week after exposure i went to do hiv test 10-15 minutes text and came negative….i read earlier that you said to jim that a fith week test got 99% accuracy,is that true?i know that im still on the window period but just wanted to know the accuracy on the fith week,help
Hi inaki,
I am very sorry to hear that. But you really should not be too worried. Here’s why:
1. The risk of catching HIV from an infected source in receptive vaginal intercourse is 10 in 10,000.
2. The risk of catching HIV from an infected source in receptive anal intercourse is 50 in 10,000.
3. A rapid test done with an approved test kit at 5 weeks is 99% accurate.
So you can see that your risk is not high to begin with and you had a negative test at 5 weeks.
You really should be ok. Please test again at 12 weeks to be 100% sure.
Please also remember to always practice safe sex.
rgds
Dr Tan
Dear Dr.Tan,
During the last few months(from nov-mar), I was engaged in heavy make out session with a number of random guys I met in the club and I could not recall if I had any cuts in my mouth due to my braces at that point of time. So I am a little worried if I should go for a HIV test. Please advice
Hi Diana,
I assume you are worried about the risk of catching HIV from deep (french) kissing and that there were no other kinds of sexual contact during your make out sessions.
The risk of catching HIV through deep kissing is unproven. Even if there were cuts or ulcers in your mouth.
It is true that saliva contains the HIV virus but it is in very low concentrations. Furthermore, the antibodies in the saliva negates most of the HIV virus.
So in conclusion, your risk of catching HIV is miniscule. I would however still advise you to have a HIV test to be 100% sure and for peace of mind.
rgds
dr tan
thank you so much Dr.Tan!
Hello doc
I really need your help I had same problem & I have had test for 12 months p24&pcr RNA is it accurate for low risk & done? Please help me(I don’t know that he had blood in his mouth or not & I am not sure about my self too
Hi Peg,
At 12 months post exposure you really should NOT be doing the P24 test or the RNA PCR test. Both these tests are completely inaccurate at 12 months post exposure and was a complete waste of your money. I shake my head at why anyone would advise you to have these tests done. What you need is a simple and cheap HIV antibdoy test. At 12 months this will be absolutely conclusive.
rgds
Dr Tan
Thank you dr
(
But all of them became negative!!!
& p24 was ab, ag do I need test again?! These test are not accurate???
Hi Peg,
Since you did the P24 combo test which also contains an antibody test, this is accurate and conclusive. You do not require a re-test.
rgds
Dr Tan
HIV combin that looking for HIV 1-2 is accurate? Thank you for your help god bleed you
Hi Peg,
I sincerely hope God will not ‘bleed’ me. That actually sounds scary. Most HIV Combo tests looks for both subtypes 1 and 2. The accuracy depends on the window period.
rgds
Dr Tan
Hello dear doc
Is antibodi to HIV 1-2 accurate & same with another HIV antibody tests?(combo HIV
Test ab, ag)
Hi Peg,
You are obviously confused by the different type of HIV tests. A HIV antibody test tests for HIV antibodies (most tests will test for both 1 and 2 subtypes). A Combo test tests for HIV antibodies AND the P24 antigen.
rgds
Dr Tan
Hi Dr. Tan,
I had unprotected sex more than 4 months ago with an unknown woman for about 3 minutes. I have tested 5 times since then at 3 weeks laboratory Elisa. 7,9,12 weeks fingerprick rapid test. 18 weeks after risk oral rapid test for hiv 1/2 Oraquick Advance.
All of them negative with pre and post conseuling in Mexico, they told me I don´t need to test again but I want your specialist opinion.
My wife and I want to have a baby soon, so I want to be completely sure I don´t have hiv. In your opinion, do I need to continue testing or can I move on?
Thanks in advance!
Hi Thomas,
You can defnitely move on.
The fingerprick test done at 12 weeks and the Oraquick test done at 18 weeks are both conclusive.
So with 2 conclusive negative tests, you can rest assured that you do not have HIV.
Congratulations on being a father.
rgds
Dr Tan
i had unprotected oral sex and protected sex. after few minutes, the girl say the that condom is nearly drop and change a new one. i had check 3,4,6 weeks and 50 days…the result came back negative. In week 8, i caught flu,fever,running nose and sore throat. is it the symptoms of hiv? should i get test again in 90 days?
Hi worry,
Do not rely on symptoms. They cannot help you make a diagnosis and will only cause you to worry.
You definitely should get tested again at 90 days post exposure to be 100% sure.
rgds
dr tan
I had unprotected sex with an unknown person FIVE YEARS BEFORE. This has been bugging me for years thinking that “Is there any possibility that I would have been infected with HIV?”. Because of this fear I didn’t have sex with anyone after that incident till now. Last week (i.e. AFTER FIVE YEARS FROM MY POSSIBLE EXPOSURE) I took the Rapid HIV test in my local medical center and the result was NEGATIVE. But I was not satisfied so I took the test again on the next day and the result was HIV 1 – NON REACTIVE & HIV 2 – NON REACTIVE; After this I came to know that these test are not accurate during the HIV WINDOW PERIOD. So now I’m feared with this…….. Is their any possibility for the HIV WINDOW PERIOD to be MORE THAN SIX MONTHS FROM THE DAY OF EXPOSURE? Because I had already passed that window period long back. Further day after tomorrow I’m going to be married I don’t want to infect my lover in case I’m infected. please reply me its urgent…………
Hi Madhan,
You do not have HIV.
Please forget about this and move on.
Congratulations on your upcoming wedding.
rgds
Dr Tan
thank you very much for clearing my doubt…… this fear has been haunting me for many days…..
thank you very much doctor
Hi Dr,
I had received an unprotected oral sex from a female. I ejaculated out of mouth, the whole process was <10 secs. and I also had a protected vaginal sex with the same person. What my risk and when should I be tested?
Pls help thanks.
Hi Anxious,
Your risk of catching HIV (assuming that your partner is HIV +ve) is approximately 1:20,000
You should get tested at 4 weeks post exposure and again at 12 weeks post exposure.
rgds
Dr Tan
One year before an unknown guy seduced me and tried to have sex with me but I opposed him and escaped while opposing he scratched on the fore skin of my penis. After this incident one of my friend said that if he had HIV then that could transfer to me if his hand was wounded. But I don’t remember whether he had any wound so this has been bothering me for the last one year. So I took an HIV rapid test yesterday (after one year from the incident)and the test came as HIV I & II – NON REACTIVE. So does this mean I’m not infected or should I take another test any time later?
Hi Peter,
Catching HIV from a scratch is unheard of. Regardless of where the scratch is.
Furthermore, a HIV test at 1 year post exposure is defnitely accurate.
You do not have HIV and should put this behind you.
rgds
Dr Tan
thank you doctor
thanks doc
Dr. Tan i just want to ask.. I had a sex encounter to a male 6 months ago abd we do iral and anal for about 2 minutes wutjout aby penetration.. I had a rapid test for hiv 1 and 2 and turns out non reactive.. Does it meam i am negative or should i get another test? Thank you
Hi Cj,
There are a few details I need:
1. What exactly is the exposure? I do not understand ‘oral and anal without any penetration’
2. When did you have the rapid HIV test?
rgds
Dr Tan
I had my test they call it human rpr and serodia PA.. The mrthods are agglutination and flocculation..turns to be negative the test done last june 10 2011 my last contact to a positive person was november 22, 2010.. He diagnose hiv positive dec 12 2010
We just gad oral sex and abd anal not too long only 1 minute i guess.. He blaming me that he get it from me though my test for human rpr and serodia test is non reactive.. Im afraid did i realky infect him or he get it from other guy??? Thank you
Hi Cj,
In this case, what happened during the exposure doesn’t matter.
You HIV test done on 10 June 2011 was clear.
Your last contact with him was 22 November 2010.
We can conclude that he cannot have been infected by you.
On a seperate note, if you had any exposures within 3 months prior to 10 June 2011, you should get a re-test.
rgds
Dr Tan
Thank you for tge answer dr. Tan is there any test called p
P25 and P34?? Base on his result was ‘found’.. Does it mean that in 3 weeks of expose a p24 test can determined if hes positive??
Hi Cj,
I think the test you are referring to is P24.
Yes. The P24 Antigen / Antibody combined test is senstive at 3 weeks post exposure.
rgds
Dr Tan
Hi Dr Tan
Do you think is there any possibilities of HIV transmission during the extraction of blackhead/pimples by (pimple extractor)needle from a infected beautition/instrucmen?
if the person is exposed to needle that are contaminated with HIV-infected blood in the process of pimples extraction?
or
If the person’s pricked bleeding pimple is exposed to HIV-infected blood from beautifion’s hand or saliva?
21 June 2011 9pm -I started to have fever and noticed a swollen lymph node behind the right ear (It feels painful if I pressed on it) after 9 days of the facial.
22 June at 7pm- I noticed about 10 blisters all over the face, back, stomach & back. Doctor diagnosed it as Adult chicken pox by looking at the blisters and prescribed several medications included acyclovir.
23/24 June – Total about 100 blisters popped out all around the body. No more fever.
25 June – No more new blister and some started to be drying out
2 July – swollen lymph node behind the right ear is still there but it doesn’t feel painful when press on it.
Until today the swollen lymph node behind my right ear(about ten cen size) is still there. So I feel very worried. And my bf said I’m over reaction. :p
P/S I never have any sexual behavior before
Thanks
Hi Ringo,
There is a chance of HIV transmission via exposure to infected needles.
Although this applies more to intra-venous drug abusers.
The chance of being infected with HIV via an infected nedle used for pimple extraction is theoretically possible but extremely unprobable.
None of your symptoms suggests a HIV infection. You are being more worried than you need to be.
Nonetheless, considering your situation and state-of-mind, I would recommend that you get a HIV test for peace-of-mind.
rgds
Dr Tan
Thanks Dr Tan for your prompt reply.
I had tested with the finger prick home test kit* on day 52 after the facial. I tested with one small drop of blood from my finger and the result is negative.
My question is:
will the small amount of blood decreases the accuracy of the test?
Do I need to be test again?
*EZ-TRUST™ HIV 1&2 Rapid Screen Test
(Supplier:CS Innovation)
* My bf bought it from a pharmacy and it is also available online
http://www.hivtest.com.my/product.php
Hi Ringo,
There are only 2 rapid HIV test kits approved by Singapore’s HSA. They are HIV-Determine and Oraquick.
I would advise you to be very careful with test kits purchased from an unsubstantiated source.
It is still best to see a doctor to get tested.
You should also speak to your doctor about testing for Hepatitis B.
There are many reasons for a person to have brown/red spots on her face but HIV is NOT one of them.
rgds
Dr Tan
Thanks Doctor Tan
I will go for the medical checkup.
I’m so worried is because the beautician has lots of brown/red spots on her face.
Hi doctor,
Seven months ago (i.e. on 29th December 2010) I had unprotected sex in my relatives marriage with an unknown girl but this has been bothering me for last few days so I took an HIV test on 11th August 2011 i.e. seven months from my possible exposure in my local medical center and the result came as HIV I & II non reactive, further I had no sex in between this test also. Does this mean I’m totally free from the possible exposure of HIV?. Please help me doctor this has.
Hi Murali,
A HIV test at 7 months post-exposure is 100% accurate.
You do not have HIV. Please forget about it and move on.
rgds
Dr Tan
I was worried because some of my friends said that test are not accurate during window period I don’t know much about that doctor.
Sorry to disturb again Doctor, Is there possibility that window period can be more than six months?
Please clear my doubt, Is there any possibility for HIV window period to be more than six months?
Hi Murali,
You really need to trust the medical centre you went to, the doctor you saw and the test you did.
In Singapore we recognize a window preiod of 3 months. i.e. once a patient tests negative for HIV 3 month after his or her exposure, we tell the patient they are 100% clear and there is no need to test again.
Testing at 7 months post exposure is already more than enough. Please stop worrying.
rgds
Dr Tan
Hi Doctor,
10 days ago I had protected sex with a sex worker and I would rather get tested for HIV sooner rather than later.
Although the PCR test is the eariest test it is quite expensive & I was wandering if the P24 Antigen test would be a suitable alternative?
I’ve read around the net and the window periods for the P24 Antigen Combination test vary from 12 days to 28 days. Would it be ok to take this test around the 14 day mark with accurate results?
Thanks
Hi Ben,
That is a really good question.
P24 antigen starts to be detectable in the blood at about week 2 but it only starts to rise rapidly at week 3, peaks at week 4 and drops by week 5.
Testing at 14 days has a good positive predictive value (i.e. if it is positive then it is very likely there is a HIV infection) but has a poor negative predictive value (i.e. if it is negative it does not prove anything).
It is still best to wait till 4 weeks post exposure to be tested.
rgds
Dr Tan
sir waiting for reply
Thank you for clearing my doubt doctor my fear has been worrying me for a long time…. Now I feel good thank you and sorry for disturbing……..
Hi Murali,
It is my pleasure. Please do not apologize.
I set up this website to help people and it is my joy and privilege to be able to do so.
rgds
Dr Tan
Hi Dr Tan,
I was involved with a CSW about 5/12 ago. Subsequently, developed 3 sore looking ulcers with yellowish base over my foreskin about 2/7 ago. I was told by my GP that they were genitalis Herpes, therefore I underwent the acyclovir treatment for 1/52 and I also did a comprehensive STD screening. Today my results were out with all negative status including HSV type 1 & 2 IgG Ab negative. I would like to have a second opinion, how is it possible?
Thank you in advance.
Hi Lenny,
There are 2 possible scenarios:
1. You do not have Herpes. Sometimes it is difficult to diagnose a Herpes rash just by looking at it.
2. You caught Herpes recently i.e. < 6 weeks ago. The blood tests may not show antibodies so soon.
The practical thing to do is to repeat a Herpes blood test in 6 weeks time or do a Herpes IgM Ab blood test which is more accurate for recent exposures.
rgds
Dr Tan
Hi Dr Tan,
Thank you for your prompt reply, I do not have any sexual contact with any high risk partner since > 5/12 ago. Therefore I couldn’t find the reason for the occurring sores/ulcers.
Regards & Thank you.
Hi Dr. Tan,
I had sex with a sex worker almost 3 months ago. I used a condom, I developed a sore throat, no fever a week after. I took the antibody test at 2 weeks post exposure. RNA test at 18 days. DNA PCR test at 31 Days. Oral test at 50 days. DNA PCR/Antibody test at 65 days. The doctor told me the PCR test will not be any different after the 65 day post exposure. I plan on taking another antibody test at 80 days. I’ve spent so much money on tests, I need peace of mind. Should I be worried?
Hi Matt,
Looking at all the tests you did, it is impossible that you have HIV.
There is absolutely no more need for you to do any HIV tests.
Please put this behind you and move on.
rgds
Dr Tan
Hi Doctor Tan
I’ve done the full blood screenings and urine test on 19 August 1 pm.
13 June – Facial
(Extraction of blackhead/pimples by needle from a beautician who has lots of brown/red spots on her face & she looks quite sick)
21 June – Fever & noticed a swollen lymph node behind the right ear
22 June – Blisters on the face & body
19 August – Anti HIV I & II (ELISA) = non reactive
(After 68 days of the facial)
My questions are:
(1)How is the accuracy of the ELISA blood test at day 68?
(2)Do I need to go for another test at 90 days?
Thanks Doctor
Hi Ringo,
I am very glad you had the test done.
A HIV ELISA test at 68 days post exposure is 99.9% accurate.
Please do another test at 90 days post exposure to be 100% sure.
Rgds
Dr Tan
Dr tan,
I just want to ask if how accurate is ELISA or WESTERN blot test at week 2 or week 4 after posible exposure???and hoe accurate is serodia test and human RPR test?? Thanks alot..
Hi Cj,
Elisa test is about 90% accurate at 4 weeks post exposure. Western Blot is a confirmatory test and NOT a screening test. I am unfamiliar with the ‘serodia test and human RPR test’.
rgds
Dr Tan
hi Doctor i had an unprotected anal sex for few seconds (just enter my penis tip) with my fiance for 1st time after 6 months i test for HIV it was negtive any further tests r needed or not ? plz healp the result of test was Non reative (0.094)
Hi bilal,
Is there a reason to suspect your fiance has HIV? That aside, a HIV test 6 months post exposure is conclusive. You do not have HIV.
rgds
Dr Tan
Hi Dr. Tan,
Thank you for the feedback. I took so many tests because I developed symptoms. Sore throat. Diarrhea. Stiffness in neck. Are the RNA and DNA PCR tests accurate? If so, do you think I should get checked out for another disease?
Hi Matt,
The RNA and DNA PCR tests are most certainly accurate. Of course I am assuming you had the test done at an accredited clinic and lab.
Your symptoms are definitely not normal. You should see a doctor and figure out what is wrong. The only conclusion I can make at this point is that it is defnitely NOT HIV.
rgds
Dr Tan
Thank you Dr. Tan. Many people have posted that the early detection tests aren’t approved so they’re not valid. I was afraid that I may have passed it to my girlfriend. I’ve used a condom everytime post possible exposure. She developed a sore throat which made me freak out. But it was diagnosed as strep. Her face is a little bigger. She says its due to her adding on a few pounds. Is that a symptom? This will be my last question.
Hi Matt,
I have to assume that the early detection tests you underwent are done using the HSA and FDA approved kits. In my clinic we use Oraquick and Determine. These 2 kits have strong research to validate their accuracy. The same applies to PCR tests. I have to assume that the lab that ran your tests is an accredited lab. Of course there are many early detection test kits out there that are complete scams. That is why I always encourage people to get tested at their doctor’s rather than purchase test kits online.
You should trust your girlfriend’s doctor. Strep throat is a rather straightforward diagnosis to make. HIV patients often develop loss of fat in the lower face. Very much the opposite of what your girlfriend has.
Keep the questions coming. I really do not mind.
rgds
Dr Tan
Hi Doctor Tan
What is the difference between ELISA test (For full blood screenings medical checkup) and rapid test?
Because you mentioned about Rapid test at 6 weeks is conclusion. So how about the ELISA test at 68 days? Can it be conclusion?
Thanks Doctor
Hi Ringo,
ELISA tests and Rapid Tests are almost the same thing. The ELISA test is older and slightly less accurate. I cannot say the ELISA test is 100% conclusive at 68 days post exposure but I can say that it is at least 99% accurate. You should still do a test at 90 days to be 100% sure.
rgds
Dr Tan
HI Doc,
I was exposed 5 days ago. The wait to be tested is unbearable.
Understand that the min waiting time for:
PCR is the earliest = 10 days
P24 = 14 days
OraSure = 1 mth
Can you confirm this?
Also, night sweat not an early symptom of HIV right?
Thank you,
Hi kk,
RNA PCR minimum 10 days. Please do not confuse this with DNA PCR.
P24 – 3 weeks
Orasure – 1 month but must be repeated at 3 months.
Whatever symptoms you have now should not worry you. At 5 days it is far too early to be developing acute retroviral syndrome.
rgds
Dr Tan
Hi Dr. Tan,
Several questions on HIV blood rapid test kits.
I have purchased a hiv blood rapid test kit and carried out test at home. As I read the instruction on the kit, I know that on the blood collecting sample area on the kit, there is HIV virus antigen, which will react with the HIV antibody in finger blood (if exist) to further process.
Q1. Are the rapid test result taken on 90 days post exposure conclusive?
Q2. If my bloody finger with wound (cut) touch the sample area (with antigen) of the test kit, will I be infected by the HIV virus?
Q3. What is the HIV antigen used on the sample zone on the test kit, are they virus?
Thanks a lot!
Hi Billy,
Q1. Yes. A HIV antibody test done at 90 days is conclusive.
Q2. No. These are antigens not the full virus. It cannot cause an infection.
Q3. No. They are a small marker found on the viral shell.
One note of caution: be very careful about HIV rapid test kits bought online. Make sure they come from a reliable source. The above answers only apply to test kits that have been tested, approved and verified by your local health authority.
rgds
Dr Tan
Hi Dr Tan,
Thanks a lot on the detailed answers. I believe what you said the source of the test kits is important to provide safe and accurate test results.
Billy
Dear Dr.
Had a encounter with a girl from china. It was protected but condom broke. The girl state her last encounter with another man was 3weeks ago and it wad always protected. I requested she did a test 4weeks after her last exposure (excluding me). It was negative. Been monitoring myself but didn’t display my signs of seroconversion.
But will go to your clinic for anonymous check, what are te chances I’m clean?
Thank you. Really regret my actions and this will be my last.
Hi Scared,
The fact that she always has protected sex and had a negative HIV test 4 weeks post exposure really means the chance she has HIV is extremely low. Which also means that the risk to you is even lower. You should still have a HIV test done to be sure. Do not bother about seroconversion symptoms. It will only serve to worry you further.
rgds
Dr Tan
By the way the test she did at 4weeks post exposure is a finger prick test.
Hope to hear from you soon.
And what is the accuracy if I do the 3steps test at 59days post exposure?
Thank you.
Hi Scared,
I have to assume it is a finger prick test using an approved and validated test kit. The 3 step test aka rapid HIV Ab Test done at 59 days post exposure is >99% accurate. Once you have gotten HIV out of the way, you should also be thinking of testing for the other STDs. It is much more likely to catch gonorrhea, chlamydia or NSU via a broken condom than it is to catch HIV.
rgds
Dr Tan
Dear dr tan
Thank you for your reply.
Will be dropping by your clinic for the 3steps test just to be sure.
Thank you Dr. Tan,
I took the RNA test at a doctor. I took the DNA PCR tests from stdtestexpress.com. Even though it’s an online test, I was required to go to a lab for blood work. Is this valid? I’ve also began to feel a weird feeling under my armpits. Should I be worried?
Hi Matt,
It would be good if you can scan the test reports and email it to me at tankokkuan@drtanandpartners.com
It is difficult for me to comment on individual symptoms and their significance. You really should see a doctor to assess all your symptoms i.e. sore throat, stiff neck, armpit discomfort etc and come to a clinical diagnosis and management plan. You could be having an illness completely unrelated to HIV or STDs. Don’t miss the forest for the trees.
rgds
Dr Tan
Hi dr tan,
I was sexually involved with a lady on 25th march this year. I used condom for intercourse but not during oral sex(both receptive and giving). Condom did not tear but I have read about transmission via oral and I am worried despite the very slim possibility. She claimed to be cleared of HIV.
I got tested 3.5 months after this exposure with the rapid finger prick test at an approved clinic and result returned negative. How reliable is the result doctor? Thanks alot. This incident is causing a nervous breakdown.
Hi Regretful,
A negative HIV test at 3.5 months post exposure is conslusive. You do not have HIV. Please stop worrying, put this behind you and move on.
rgds
Dr Tan
Thanks doctor.
But what are the chances that I might be positive? Maybe I was still within the window period during the testing? What are the odds of me contracting HIV through the scenario I went through? Thanks alot doctor.
Hi Regretful,
You tested negative at 3.5 months post exposure. That is after the recommended window period of 3 months. You do not have HIV. You really need to forget about this and move on.
rgds
Dr Tan
Thank you doctor. This episode is causing alot of negativities in my life.
Hi Regretful,
Medically you are defnitely ok but it seems to me that psychologically you are not. If you find the worry and anxiety starting to affect you daily life, you really need to consider seeking professional help. See me or your neighbourhood GP or polyclinic.
rgds
Dr Tan
Hi Dr Tan,
Thanks for this great website and the feedback..
How accurate is the Oraquick rapid test at 2 weeks and 3 weeks? I read somewhere that the statistics are 50% and 84%
Is this accurate? Thanks so much!
Rgds
Gautam
Hi Gautam,
These statistics are unfortunately rather meaningless. Just to illustrate my point, if a patient asked me at 2 weeks post exposure if he has HIV or not and I flip a coin and say ‘Heads! you do not have HIV!’ I’m sure the patient will call me crazy and write a complain to the Ministry of Health. Well, 50% accuracy really means its just as accurate as flipping a coin. These statistics, when applied to different individuals will either cause undue anxiety or give a false sense of security. Furthermore, when we discuss the HIV window period, we are not so much discussing the accuracy of the testing system (which is very important but a different topic altogether) but rather the unpreditability of an individual human’s immune system in response to a viral infection. The take home message really is ‘Do not trust a HIV antibody test at less than 4 weeks post-exposure.’
rgds
Dr Tan
Hi Dr Tan,
Thanks for the great advice..
1 Question — is an Oraquick at 4 weeks as good as any other anitbody test at 4 weeks?
thanks again
Gautam
Hi Gautam,
There is a very marginal difference in sensitivity between Oraquick and Determine. Both are superior to ELISA.
rgds
Dr Tan
Hi dr tan,
I did a elisa test at 1mth, oraquick at 6weeks and rapid finger test at 84days. All done ar DSC Singapore.
M I ok?
Thanks
I also did a Syphilis at sata 1mth after protected sex. Is it ok?
Hi Wihtecat,
No. Please repeat a Syhpilis test 90 days post exposure.
rgds
Dr Tan
Hi doc, if the syhpilis test is done on 84 days at DSC.? Is it good enough?
Hi Whitecat,
No it is not. Repeat the Syphilis test at 90 days.
rgds
Dr Tan
Hi Whitecat,
Yes you are OK.
rgds
Dr Tan
I don’t need anymore HIV test? 84 days is conclusive ?
Hi Whitecat,
The official line that MOH takes on the HIV window period is 3 months. Whether you interpret this as 84 (28 x 3) days or 90 (30 x 3) days is really splitting hairs. It makes no difference. A 3 month window period is already much safer than it needs to be. You do not need anymore HIV tests.
rgds
Dr Tan
Hi Doctor Tan
I have called to the beauty salon just now and the customer service told me that they are not using those one-time-use disposable needles. Instead they use those reusable needles but will do the “cleaning”!!!
I really shocked to find out that they use reusable needle for pimple/blackhead extraction. So I tell her regarding what had happened to me after the facial and I don’t feel comfortable with that particular beautician and thier reusable needle.
What if the reusable needle was not cleaned properly? What if a HIV infected beautician use a contaminated needle on my face intentionally?
The HIV Elisa test is non-reactive at 68 days. If I’m going for another Elisa test at 86 days (next mon)is it conclusive? I’ve experienced flu,fever,sore throat for few weeks since 66 days and a swollen lymph node behind the right ear since 9 days.
Thanks Doctor
Hi Ringo,
I agree that the beauty salon really should not be using reusable needles. The good news is even with simple cleaning, the HIV virus is very easily destroyed. This however does not apply to other diseases like Hepatitis B. That said, your negative test at 68 days is very close to being conclusive. At 86 days it is defintely conclusive. I really do not think your symptoms are caused by HIV. Aside from having multiple negative HIV tests, 9 days is also much too early to develop sero-conversion symptoms. Please do not worry.
rgds
Dr Tan
Hi Doctor Tan
However can all of these diseases be conclusive at days 68?
Hepatitis A,B,C
G6PD screening : Deficiency Not Detected
Syphilis Serology (Modified VDRL): Non-reactive
Helicobacter Pylori lgG:0.30 (Negative<=0.90)
Free T4: 1.14 ng/dl (Adult:0.70-1.85)
What other diseases can be cause by infected blood or saliva on bleeding pimples?
Thanks
Hi Ringo,
The only test you need to repeat at 90 days is Syphilis (VDRL).
rgds
Dr Tan
Doctor Tan
Definitely I’ll go for the second test. But do you think there will be any difference of the result for 68 days (>99% accurate) and 86 days?
Thanks
Hi Ringo,
No. I do not think there will be any difference at all. I would actually bet with you on that but unlicensed betting is illegal in Singapore.
rgds
Dr Tan
Thanks Doctor Tan for your prompt reply. It really means a lot to me.
Doctor Tan
i got hiv duo test which called 4th generation test at 4weeks 5weeks 6weeks 7weeks they all came back negetive and i did this is followed by some hiv science document. and the date shows the p24 will be detectable from 2-6 weeks and rich the top at 4weeks then with the antibody developped the p24 will not be detectable. in my case , is that 100% sure that i am hiv negtive. than you.
Hi Evan,
A P24 DUO test means the test both detects P24 Antigen AND HIV Antibodies. As the level of P24 antigen drops, the level of HIV antibodies rises. That’s what makes this test so accurate and versatile. You are 100% HIV free. Please stop worrying.
rgds
Dr Tan
Hi,
I was a victim of sexual assault just over 3 months ago (15 weeks to be exact). I don’t know what exactly was done to me (I was drugged unknowingly and can’t remember everything) and so now I am totally freaking out about everything! Since this was a stranger, I am terrified that there could be any possibilty of contracting HIV. I’ve had 3 HIV tests done so far (all done at planned parenthood because I am too embarassed to talk about it with my doctor).
The first test they did at 3 weeks after possible exposure. The HIV 1/2 EIA AB Screen came up Non- Reactive.
At 9 and a half weeks I went back in and they pricked my finger for the rapid test- again negative.
At 13 and a half weeks I had my last test done… Again the HIV 1/2 EIA AB Screen- and again Non-Reactive.
I was going to leave it at that and try to move on, but here’s my worry… The first 2 times I went in, the people at planned parenthood told me the results are conclusive at 3 months. This last time I went in they told me that it won’t be until 6 months to a year… Now I’m confused- and a little annoyed that the people who work in the SAME place can’t give me the same answer. I’m still freaked out and am thinking of going to another clinic to have an RNA test done… Or at this point am I just wasting my time and money? Help?
Thank you!!
Hi Sarah,
I am very sorry to hear what happened to you. The one thing you do NOT need to worry about anymore is HIV. An EIA Ab test at 13.5 weeks is definitely conclusive. Do not waste anymore time, money or mental energy on HIV. I hope you stay strong and recover from this ordeal soon.
rgds
Dr Tan
many thanks dear doctor, because so many comments on the internet talk about window period so i feel puzzled. i do not know why they do not change it. i accept that when using 1or2 generation the 3 month is reasonable but with the advance of biological tech they still use the old window time stated at 90th.
Hi Evan,
You are absolutely right. Unfortunately, policy and recommendations must always lag behind scientific advancement.
rgds
Dr Tan
Hello Doctor,sorry for my bad english…My question is ELISA TEST after 32 days-negativ.How safe is this result?Shoud i be worried?
Hi K.J.,
An ELISA test at 32 days post-exposure is about 90% accurate. You must repeat a HIV test at 3 months post-exposure.
rgds
Dr Tan
Dear Doctor,
I am seeking your advice. I had last sex with a lady sex worker in february end or first week of march 2011. We had protected sex only. But one time i received oral sex without condumn for 1 minute. I did nt do oral vaginal sex with her..and always did protected sex only ( a total of 10 times only). then after 2 month i did medical check up for abroad job ,tested for Elisa and the medical center told me that, we have to retest for VDRL , as it slightly negligibly shows +ve and we will confirm by TPHA. immediately i consulted my family doctor and he checked my vdrl in his hospital which was -ve. then he told me that, no need to worry abt vdrl, but if u have vdrl, confirm with TPHA. VDRL is quite common he said. The very next day i retested in the medical center where did my first test,result for TPHA was -ve. I reported this result to my doctor. Then he said, you are ok, but stil he gave me some medicine to cure the vdrl, even if i have undetected vdrl. Then i did a Elisa test again in abroad after 35 days of that test ( after 100th day of my last sex)…all result was -ve only.including HIV. but still am worried coz am reading over internet about 6 month window period for rare cases. Pls suggest me. do i need to test at 6 month again? i need a detailed reply on this, coz am going to stop read on internet. your reply would conclude me today. I am happy to alo read that, 3 month test is conclusive everywhere in internet, but in some places suggest to do at 6 montth for rare cases. Thats what my worry..also what all are the reason to show that slight +ve vdrl ( though it is a negligible amount only) and -ve TPHA???????
Hi No worry,
1. HIV ELISA test at 3 months post-exposure is conclusive. You do not have HIV. Stop worrying.
2. VDRL is a screening test for Syphilis. Many things can cause a false positive VDRL like Infectious Mononecleosis, Malaria, SLE etc etc. TPHA is a confirmatory test for Syhpilis infection when the VDRL is positive. A negative TPHA means you do not have Syphilis. There is no need to ‘cure the VDRL’. VDRL is a test not a disease (it actually stands for Veneral Disease Research Lab).
Your doctor really should have explained all this to you. In conclusion, you do NOT have either Syphilis or HIV. Stop worrying.
rgds
Dr Tan
Thank you doctor.
I want to ask one more thing, recently i got a infection near to penis area ( i dnt know biological name of it ), like 2 small pimples then i though it might be associated with STD, immediately consulted a doctor, she said, its a small infection and simply gave a antibiotic and a liquid type medicine, with in 3 days completely cured. Whenever i get any kind of illnes, i am jst afraid of about STDs, thats why even now i posted this to clear with you. Any other STDs do i need to worry about from my history as explained?
Hi No worry,
The only way to completely be sure you do not have any other STDs is to test for them. Unfortunately, you cannot rely on symptoms to exclude STDs.
rgds
Dr Tan
Hi Dr. Tan,
I had unprotected Sex 4 months ago on April, and i did a test with EZ-TRUST™ Rapid Anti-HIV (1&2) which manufactured from Singapore/Malaysia and approved by USAID on 24 Aug 2011. the result came Negative and am still worried as i have to donate a kidney for my mom soon, please advise with best of your knowledge do i relay with the result of the test kit which i had?????
Hi Going Crazy,
The test kit that you used is not approved by US FDA or Singapore’s HSA. So I really cannot comment on the accuracy of the results. Prior to kidney donation, you will be tested for all infective diseases including HIV. So you do not need to worry about passing any diseases to your mom. If you want to get tested before the hospital tests you, see your doctor and have a proper approved test done. I hope the donation is a success and wish your mom a speedy recovery and a long and healthy life.
rgds
Dr Tan
Hi Dr Tan,
Does fingering in the vagina area safe? There are no cuts on my middle finger.
Hi Mr Need Clarification,
I assume your question reads ‘Can I contract HIV via finger-vagina contact?’. The answer is No. You can however, contract other diseases like Syphilis and Herpes.
rgds
Dr Tan
Hi Dr Tan,
How Accurate/Reliable is an Oraquick rapid finger prick test at 4 weeks post exposure?
thank you
Hi Shantanu,
There are not any hard statistics or evidence to answer this question. However, according to my experience, it is about 90% to 95%.
rgds
Dr Tan
Dr,my english very poor,sorry,but u still can write english reply me. 我九月一号有跟一个男人unprotected sex，他没把semen喷进去，九月五号我逼他验血，the results show negative，我还是很担心因为他一个星期前有跟china girl unprotecte sex。请问我有几巴仙得这个病？
Hi miao,
1. Unfortunately, the test he did on 5 Sep is inconclusive because he could be in the window period. He could have caught HIV from the partner he was with 1 week ago.
2. In unprotected vaginal intercourse, assuming that he is HIV positive, your risk is about 1 in 1000.
rgds
Dr Tan
Any test for me to do?or I hav to wait after 3months
Hi miao,
Your options are as follows:
1. Do a HIV RNA PCR test at 12 days post exposure i.e. 13 Sep
2. Do a HIV P24 Ag/Ab Combination test 28 days post exposure.
3. Do a HIV Ab test 1 month and again at 3 months post exposure.
Please remember that you are also at risk of other STDs like Chlamydia, Gonorrhea, NSU, Syphilis, Herpes etc. You should screen for these diseases even if you have no symptoms. Women often carry these diseases without showing any symptoms. If you leave them untreated for too long, they can affect your fertility.
rgds
Dr Tan
Thanks dr, if I get results is bad news, I realy worry that thehealthcare department will recall me. What should I do,I don’twant this thing announce to other people.
Hi miao,
Can I assume you are in Singapore? If you had your HIV test done at a non-Anonymous HIV testing centre, and your HIV test is positive, the centre is legally bound to inform MOH (Ministry of Health) of your status. MOH will then contact you to conduct contact tracing. They will NOT inform your family, friends, employers, insurance providers or anyone else. So you really do not need to be too worried about other people finding out.
rgds
Dr Tan
Where should I do the rna pcr test,iam a staffnurse,I don’t want go to hospital do this test. can I register nick name when I see the dr?
Hi miao,
Some clinics, including ours at Robertson Walk and OUB Centre, offer the HIV RNA PCR test. Unfortunately we cannot accept nick names for registration.
rgds
Dr Tan
I am not from singapore
Hi miao,
If you are working and staying in Singapore, the same rules apply. Except that your working visa will be revoked once you are found to be HIV positive. That is an additional angle you have to consider. To give yourself more options, you might want to consider getting tested at an Anonymous HIV testing centre like our clinic at Robertson Walk.
rgds
Dr Tan
Dear dr, I still worried so I wouldn’t go to do rna pcr test, can I ask my friend check who had sex with china girl. Until now he still with the china girl. .he only sex with me once only.it was at 1september..so when I should bring him to test?I heard gribbless can use the combo assay test hiv (elisa test and p4antigentest)please refer www. Gribbles. Com. My. …the gribbles said the elisa test can do it 3to 4week post exposure and p4antigen test can detect 2 week post exposure…so how…I am not working at singapore…me already crazy ,12night no sleep..sorry my english very poor hope u can understands.mybe I will go to killself if I have bad new from my friend..
Hi miao,
You should forget about your friend and concentrate on yourself. It is now 12 days since your potential exposure. Remember that it is only a POTENTIAL exposure. Even if he has HIV, your chance of getting it is only 1 in 1000. It is very bad to be having suicidal thoughts. I strongly suggest that you contact your local SOS hotline to get some psychological and emotional support.
rgds
Dr Tan
Good night dr, it is better I go to killself no need worried again…really worried if I ask him to do test the results is bad news..this men lied me ,he told me he has no girlfriend…:-(
Hi miao,
It is really no help to ask your friend to do a HIV test. If he is negative, he could still be in the window period and this will give you a false sense of security. If he is positive, it does not mean you also have it. Remember the risk for you is only 1 in 1000 if he has HIV. Do not lament about what happened. Concentrate on the present. It is 12 days since your exposure. You can get a P24 test in 9 days time.
rgds
Dr Tan
Dear dr,if he still have unproted sex with the china girl,what test can do? Can I ask him to do the hiv antibody test and p4 antigen on 12to13october?if 30/31august until now the men still had sex with the china girl and had sex with me on 1september..I just want to know whether he has hiv or not on 1 september..what test can do ?
Hi miao,
Like in my previous reply, I strongly suggest that you forget about what test this man can do. It has very little bearing on you. Instead of getting him to do a P24 test on 12 October, why don’t you go get the test done on yourself? That makes more sense right? What we want to prove now is that YOU do not have HIV. Not whether HE has HIV or not.
rgds
Dr Tan
中国的女人是不是每个都是做。。。。为什么她们来我们国家只是一下子然又飞回中国。。好怕！万一我是一个最倒霉怎么办呢？？如果得到还活着有何苦呢？我当时是处女耶，第一次做就倒霉，他当时只进一点而已，因为很痛没办法进到完全。。我该怎么办？为什么那个男的要骗我，他说没有女朋友，也没性过。为什么我如此倒霉，难道是上帝安排？
Hi miao,
I am very sorry to hear what happened to you. However, I strongly feel that we really should not make any generalizations about women from China or any other country. I think you are mixing your anger at being betrayed with your fear of contracting HIV. I cannot help you with the former but as for the latter, I again stress that your risk is low and you just need to get tested once the window period is up. Meanwhile, you should contact your local SOS or any counselling helpline to speak to a trained counsellor.
rgds
Dr Tan
Thank you dr,I will go to do the test..
Thank dr,I will go to test next week on 21 september,hopefully the result is good
It’s me again doctor.I test on 42 day with rapid test-negative.My contact was with condome(vaginal) but still worry.On 18 day chlamydia and syphilis test-negative.Must test again and wenn?
Hi K.J.,
A HIV test at 42 days post exposure is very very very accurate. You are as good as in the clear. You need to repeat the HIV and Syphilis test at 3 months post exposure.
rgds
Dr Tan
Dear dr, me again,do I need tell the dr what happened to me ?or I just ask him to do p24 antigen test .
Hi miao,
I’m sure when you see the doctor he/she will ask you all the relevant questions before proceeding with the test. Just answer him/her truthfully.
rgds
Dr Tan
Dear dr,I will follow your instruction..thank you dr, I already stop crying..i will be strong to live..
Dr. Tan,
Here i am again i had my test this week for a second time as u advised that EZ-TRUST™ Rapid Anti-HIV (1&2) is not approved so i visited the clinic and did the HIV 1&2 Assay and the result came back as (0.14).
Negative > 0.90
Green zone 0.90 – 1.00
Reactive </= 1.00
Please advise what that means, and should i take any further tests as my last contact was 4 months ago.
Hi Going Crazy,
I have not heard of the HIV 1 & 2 Assay and really do not know how to interpret the results. I suggest you do one of the following tests: HIV Determine, Oraquick or HIV ELISA. These tests are all approved and validated by FDA and Singapore’s HSA. 4 months is past the recognised window period of 3 months so any of the above tests will be conclusive.
rgds
Dr Tan
Dear Dr Tan,
Please cover the patient index finger using plaster after the HIV testing. The bleeding index finger touching NET-machine will left some blood there. Another patient with cut on his index finger after testing HIV will get infected if he touch the NET-machine as well
Hi verysad,
I hear you and really appreciate the feedback. But I must stress that your fears are unfounded. Ask yourself this: Are you going to check every surface before you touch it? Every staircase handrail? Every door handle? Every elevator button? Could it not be equally possible that someone left some body fluid on them? Also, if HIV were really transmitted through such casual exposures, do you not think there will be a greater epidemic than there is now? Furthermore, the pinprick we use is always with a brand new sharp disposable needle. These pricks clot in a very short time. Rest assured that patient safety is our top most priority and we will never compromise on this aspect. In view of your feedback, I shall leave a box of plasters on the patient counter for anyone who wishes to use them. Thank you for the feedback and I hope you feel reassured.
rgds
Dr Tan
Doc,what do you think about 3-th generation rapid test INSTI?Is it accurate at 7 weeks or cannot catch virus so early?Thanks
Hi Johny,
The INSTI Rapid HIV 1 Test Kit was approved by FDA for use in clinical labs and point of care settings. In other words, it is not supposed to be used for home self testing. It was found to be similiar to FDA approved anti-HIV EIAs on seroconversion panels. In other words, although extremely accurate at 7 weeks post exposure, you should still repeat a test at 12 weeks post exposure.
rgds
Dr Tan
Dear Dr,me again ,start worried,about 2 week cannnot sleep…dr, if my result is positif, can i go to foreign travel?2nd worried is if my employer finding out i have hiv,i worried he will fired me…:(
Dear Dr,i have dry cough,sore throat, loss weight 2kg,and hair loss..is it the symptoms of hiv?
Hi miao,
Please refer to my article for my opinions on the early symptoms of HIV:
http://www.drtanandpartners.com/hiv-symptoms-%e2%80%93-early-symptoms-of-hiv/
rgds
Dr Tan
Dear Dr.
Could you please tell me how much % conclusive, ELISA test after 95 days of possible exposure…I did my tests at 60, 95 days HIV 1 &2 ,syphilis both were negative. What do you say about statistics of HIV cases beyond this period? Internet portal gives different opinion.
Hi Kim,
As far as I am concerned, the ELISA test for HIV is 100% conclusive if done 3 months post exposure. So is the syphilis (VDRL + TPHA) test.
rgds
Dr Tan
Hi doctor,
Would an antibody I and ii test at 8 weeks be good enough for a risk of receiving unprotected oral sex?
Hi Jan,
I think you are mixing up the 2 issues. Unprotected oral sex indeed poses a very low risk of transmitting HIV however, it has nothing to do with the window period. The window period remains at 3 months regardless of the mode of transmission.
rgds
Dr Tan
Thanks doctor,
May I know what is the accuracy of a 8 weeks negative test?
Because I’m told that there is no need for a repeat test..
Thanks.
Hi Jan,
This is a difficult question to answer. First of all, what test did you do? If it was the HIV Determine Rapid Test, then I can say the test is as good as conclusive at 8 weeks. However, the Ministry of Health in Singapore takes the stand that the window period for HIV testing is 3 months regardless of what test is used. There is however a discrepancy between science and policy. It you let me know exactly what test you did, I can give you a better answer.
rgds
Dr Tan
Its a HIV I and ii antibody blood test ran by quest laboratory…
Thanks doc
Hi Jan,
That is an ELISA test. Repeat the test at 3 months.
rgds
Dr Tan
To add on I also had a negative finger prick rapid blood test at 6 weeks..
Thanks.
Hi Jan,
There are many rapid finger prick HIV tests available. So it is hard for me to comment.
rgds
Dr Tan
Hi doctor, its the oraquick one..
Thanks
Hi Jan,
Using the Oraquick test at 6 weeks with fingerprick blood is very accurate. Close to 99%.
rgds
Dr Tan
Hi dr tan.
I did a 6 weeks test at DSC. It a quickoral test. The result was negative.
Wan to ask how accurate is a 6 weeks test ?
My encounter was protected sex with a csw.
Hi Pete,
The Oraquick Rapid HIV test at 6 weeks is 99% accurate. Repeat the test at 3 months post exposure.
rgds
Dr Tan
99%? den y policy still say 12weeks?
Hi Pete,
You bring up a good point. There are 2 reasons:
1. for HIV screening, 99% just isn’t good enough.
2. Policy always lags behind science and evidence.
rgds
Dr Tan
Thxs doc.
Now I took one rapid blood test at about 83-84 days. Came back negative.
Can I move on ? Or I need to re test at 90 days?
Hi Pete,
Please forget about it and move on.
rgds
Dr Tan
Im negative at 11 weeks and 3 days with eliza antibody test. Do I need re – test at 12 weeks?
Hi crazygreen,
No you do not.
rgds
Dr Tan
DEAR DR TAN,ME Again ,sorry disturb you again, I done the blood test 21sept yesterday morning. .. now I can’t sleep ,I very scared my result ,I ask the dr do vdrl and pregnancy test also. ..I do not know my result is negative or positive,if positive how can I do? ????please help me. ..my heartbeat very fast…I fear the dr tell me about my result is hiv positive…how? plese help me emotional support I need your support… please dr:-(
DEAR DR, you told me that my risk is low, I do not know am I a unlucky in the world?please help me dr, really helpless…I cannot share my problem to orther people ,only you dr tan…I ask dr call me if my result is ready,I fear if he tell me” you have hiv positive” now 2o’clock morning I still cannot sleep 21night no sleep …..I don’t know if my result is posutive I don’t think I can stay strong pretend nothing happened…hopeless :’(:<hopeless
I had unprotected sex with an hiv+ person for over 2 months, He knew about this but didnt tell me, i had already been with him 2 years prior to this, and i have gotten tested 8 months after that and i was fine, so I found out he was hiv+ Sep.11 and i went and got tested RIGHT AWAY… test came back 3 days ago, Negative, that test was 32 days after exposure, the doctor tells me i should come down cause it is almost 100% that it is negative, but i have a sinus infection which is causing my lymph nodes on my left side to swell, i also have a tooth ache so i dont know what to think, please help me, this is killing me…the person that i was with said, he has been infected for over 10 years, since year 2000..he also told me that the doctor tells him his viral loads are very low…under 150 or something like that…please help me! im so nervouse im also nervouse because he has been around my 5 year old, but doctors tell me its impossible to catch it for just being around him, sleeping around him, or kissing or hugging him…please help!
Hi alejandraramos,
Your doctors are absolutely right. A negative test at 32 days post exposure is almost 100% confirmatory. Although you should re-test at 3 months post exposure to be 100% sure. Secondly, there is no way your child can contract HIV from living with your partner. Even if they shared food and drinks, toilets, towels, hug, kiss etc. Your child is definitely 100% OK. Thirdly, your partner is right also. It has been shown via many scientific studies that a person on anti-HIV treatment with a low viral load has an extremely low risk of infecting someone else. Lastly, please do not over-interpret your symptoms. Anyone can get a sinus infection and sinus infections almost always causes the lymph nodes to swell. It does not mean you have HIV at all. You are OK and your child is OK. Please stop worrying.
rgds
Dr Tan
thanku sooooo much u are awesomeee!!
im always gonna visit this website when i have questions…
Hi alejandraramos,
Thank you. It is a real pleasure to be able to offer some reassurance and peace of mind. It would be nice if you can help us spread education and awareness by linking us to your blog or something similiar.
rgds
Dr Tan
dr tan:
its already been a while back since i did the test (sept.11) it was negative after 32 days post exposure, i called the office and ask what kinds of test they did they said hiv1 and hiv2 i dont know what that means, but im really scared that the result might change since they told me to go back in three months to get checked again…
i have an appointment until Nov. 9th so I am so very scared that I might have it but, not know… what are the chances that a 32 day result might change at 3 months? also, i was thinking that when i was with this guy in Jan. i developed a real bad sinus infection that i had to take antibiotics for 21 days!!! i dont know if it might be realated to this, but it has been 8 months ever since…so can you please tell me, if the result is good for me to feel good about? please help….
Hi alejandroramos,
Worrying about it now is not going to make a difference. There is certainly a possibility that a test at 32 days post exposure is wrong but this is highly unlikely. Don’t you think it is rather illogical to be worried about a sinus infection you had in January for an exposure you had in August? The sinus infection was 7 months BEFORE the exposure. You are just scaring yourself.
rgds
Dr Tan
dr tan :
yes i probably am being a little crazy but im so scared…i have swollen glands in my neck and ive had headaches, i also got a razor infection under my armpits i dont know if that has anything to do with hiv but it is super freaky…im trying to stay positive and think that I had already been with him 2 years prior to this last time and i didnt get infected, why would it be that the last time i was with him i did get infected? also my ear loop where i put my earings got infected, i dont know if hiv has anything to do with that but i need help! please i feel soooo scared to wait until November… but im also really scared to go get tested and it coming back negative
HI alejandraramos,
Nothing you do now will change the final result. The fact is you will have your answer only in November. From now till then you can choose to worry unnecesarily about every symptom you have or you can listen to a voice of reason and accept the fact that your risk of HIV is extremely low. The choice is yours. I suggest that you call your local counselling helpline to speak to someone about your fears. In Singapore the Action for AIDS (AFA) provides an anonymous counselling hotline. You can look them up on http://www.afa.org.sg/
rgds
Dr Tan
So i couldnt wait any longer and i went inbto get an hiv antibody test..doc told me it came back negative and to quit worrying about it and move on…but now.i feel like i have a bump on the roof of my mouth and also my joints hurt and i have a little of a sore throat and swollen lymphts bpon my neck should i quit worrying if i had a negative at 4 weeks and. Negative at 10 weeks?
Thanku.
Hi Alejandraramos,
You need to accept the fact that you do not have HIV. You cannot be jumping at every little ‘symptom’ you have. Trust your doctor. And I agree with him. You do not have HIV. Please forget about it. If you are unable to do that, please seek psychological help.
rgds
Dr Tan
Dr tan:
Ok so i went in to get the actual paper where the results were and the doctor never told me i had had and eia test +ve she just told me everything came back negative and after 10 weeks i should feel confident and i didnt need to retest, im very scared since the dia test was positie even tho the western blot is completly negative…should i re test or can i feel good about it plz last question plz..!?
Hi Alejandraramos,
You had a positive EIA and negative Western Blot. This means the EIA was a false positive. I suggest you repeat the test at 12 weeks to be sure.
rgds
Dr Tan
Dear dr, I hope this is my last SMS,I admire who have hiv people can stay strong without worry, but I can’t ,I can’t accept these thing happened to me…I really cannot …I ever told you maybe I suicide…this is the best way to stop worry…..:-(
Dear dr ,I promise you I won’t SMS you again, but I still write sorry….suicide is the best way to stop worried,,,you ask me to contact the local phychological,I think no help…..helpless and hopeless…am I a unlucky in the world??:’(
DEAR DR TAN,VERY VERY SORRY SMS YOU AGAIN…if I get the result is negative I will email to you,If I get the result is positive ,nothing to talk ,I have no choices ,I cannt accept …I told you suicidal is the best way …if you were me you will do samething right?good night dr Tan hope you have a sweet dream
Dear dr,very sorry always disturb you,please do not angry…(^_*)
Hi miao,
Myself and I’m sure most of the readers in this forum empathise with you. I am certain your test will turn out OK. Please share with us the good news once you have it.
rgds
Dr Tan
Dear Dr,thank you so much dr, my result maybe good but I am pregnant! !the men doesn’t want the child this is my big problem!!my last period was 13august….how to solve this problem
Hi miao,
First of all congratulations on the fact that you do not have HIV. With regards to the pregnancy, the most important decision you have to make is whether or not you wish to keep your child. Either way, you will need to see a doctor to help you. Laws regarding termination of pregnancy vary greatly between countries. If you do decide to terminate the pregnancy, make sure you visit a licensed and specialised doctor.
rgds
Dr Tan
Please help me dr,my parents will killing me!!
DEAR DR, thank you dr, me no pregnant,false positive, ,I went to the clinic do the pregnancy test show negative..can I take menses medicine?I share my result to you,
1.cannabinoids negative
2. opiates. Negative
3.RPR(VDRL) NON REACTIVE.
4.Hep B SURFACE ANTIGEN (HBsAg) not Detected
5.HIV 1 AND 2 AB/AG NOT DETECTED
HIV METHOD:(ECLIA)
What is ECLIA test? I ask the dr done p24antigen but the result show ECLIA TEST…IT IS SAME?DO I NEED REPEAT HIV TEST AND PREGNANCY TEST AND VDRL?
Dear DR TAN
HOW many%accurate eclia testing hiv
Hi miao,
This is a question you should pose to the doctor who did the test for you. There are multiple types of HIV tests available and even among similiar types there are many brands. Each have their unique sensitivity and specificity statistics. You should also ask your doctor for advice with regards to the need for repeat pregnancy and VDRL tests. It is very non-ideal to have your tests done and interpreted by different doctors and advice given by yet another doctor. This leads to more confusion than anything else.
rgds
Dr Tan
DEAR DR TAN
CAN I do p24antigen on 28sept (4 week post exposure) ?I start worried..please help..the dr only tell my result OK ONLY BY PHONE…..^-^
Hi doc, i live in new york and I had unprotected sex with a girl twice, the last time was august 12. 2011, I jut found out she was HIV+, I had a rapid HIV test done on sept 20, 2011 (5 weeks 4 days after my last exposure to her) my results are
Negative. How accurate r these results? Should I still worry?
Hi Orlando,
These results are extremely accurate. In fact, some states in the US (I’m not sure about NY) actually stop testing at 6 weeks post exposure. You really should not worry.
rgds
Dr Tan
Hi doctor Tan,
I have an anxious question. I just had protected vaginal course but unprotected oral ( giving and receiving) while I was giving, I tasted a bit of a blood taste however there was no bleeding on her sidethen we had protected vaginal intercourse and when I removed the condom it was covered by a brown discharge which looks a bit like old blood. I asked her if she was having her periodss ( which didn’t seem like it) and she said no as she had them 2 weeks before. She then went to the toilet and came back with a paper with indeed a bit of a brown discharge, hence my question to you is am I at risk? Was the oral giving session which made me taste something a bit of blood considered high risk given the fact I couldn’t see any blood it was just the taste but then was confirmed by the brown colored discharge on the condom after intercourse? Thank you!
Hi Mbaseli,
Even if you did swallow a bit of blood it is NOT considered high risk. The risk of catching HIV via unprotected oral sex is miniscule to say the least and considered impossible in some circles, even with blood/bloody discharge. If you develop a sore throat please see a doctor for possible throat gonorrhea.
rgds
Dr Tan
DEAR Dr
What is the difference Hiv p24
Ag/Ab combination and my test Hiv 1 and 2 Ab/Ag?is it the samething?duo test?
Ag =antigen? And Ab=antibodies?
Please reply thank you.^-^.
Dr. I allowed a lady to perform oral sex on me, and removed her mouth before ijaculation. i also inserted my finger for few seconds. I had no wond or cut in my finger. after arround 50 days, i did my test for ELISA HIV I/II and found negative. I am still sleepless.
Hi ravi,
You are being more anxious than you need to be. First of all, oral sex and finger-genital contact has miniscule risk of contracting HIV. Secondly, an ELISA test at 50 days post exposure is 99% accurate. Just repeat the HIV test at 3 months post exposure and stop worrying so much.
rgds
Dr Tan
How many % conclusive if I take 3 weeks(duo test)
Hi miao,
You really need to engage in a proper consultation with your doctor to understand which tests were done and exactly what the implications and accuracy of the tests are. Regardless of country and systems, I really think that that constitutes the basics of medical practice. The internet can give some advice and point-of-views but can never replace a proper doctor’s consultation which is something you need right now. Not only with regards to addressing your HIV and other medical fears but also to assess and manage your psychological well-being.
rgds
Dr Tan
Dr Tan,
got an anxious question for you.
I had protected vaginal intercourse with a girl recently but unprotected oral(giving and receiving) when I Was giving I tasted a bit of a bloody taste but thre was no blood coming out (I checked since I went to toilet right after) however, after the intercourse; when I was about to trash the condom, it was covered by a brown discharge but the girl had her periods 2 weeks before. Not sure what the discharge could be due about and ultimately the question I have is what’s my risk of exposure?
thank you!!
Hi Mbale,
Please see my response to Mbaseli with a similiar exposure.
rgds
Dr Tan
DEAR DR,THANK YOU
Dear Doctor,have you met the event of a negative test 48 days after 3 months was positive?I’m talking about your private practice and in principle, …
Hi Johny B,
You are asking me have I ever seen a person test negative at 48 days post exposure then tested again at 3 months post exposure and was found to be positive? The answer is NO. In scientific studies it really depends on what test was done at 48 days post exposure.
rgds
Dr Tan
Hi Dr Tan,
Thanks again for the great forum… To extend the previous posters question, in light of your comment about what kind of test was done.
How about Oraquick finger prick, specifically, at 48 days? Conclusive as per your estimation?
thank you.
Hi Gautam,
Let’s just say I have never seen anyone who is HIV positive require more than 4 weeks to test positive on the Oraquick. However, this statement is made with the caveat that the test is conducted and interpreted using strict protocols. I wouldn’t be so confident if the test was conducted at home or by an untrained person.
rgds
Dr Tan
Tests are 2 – INSTI at 42 days and at 60 days – REVEAL.Both negative.I’m located in the European Union.Why modern science is still talking about periods of 3 months? Can we say that only chronically sick or drug addicts or transplanted (as far as I know), and other healthy people over 2 months is enough? This period ruining me …
Hi Johny B,
I share your frsutration. Unfortunately, policy always has to lag behind scientific advancement. Nobody wants to be responsible for the 1 in a million person who was missed becasue of their policy decisions. Remember that in the eyes of science, you are already in the clear.
rgds
Dr Tan
Dear Dr. Tan!
I had an unprotected sex with a 19 year old three months pregnant white girl. It lasted for about 20 minutes. I took an R24 test after 25 days of possible exposure and it was negative. She said that she has been tested when saw her doctors for pregnancy and was also negative. Do you think the 25 day test is reliable? What are my chances of being exposed? I had fevers and sore throat after 2 weeks of possible exposure which only lasted for 2 days. Thank you so much for your help. Your words mean a lot to us!!!
Hi mikeB,
I assume you mean P24 and not R24 test? A P24 test at 24 days post exposure is as good as conclusive. Furthermore, she was already tested negative for HIV which really puts you at NO risk. Even if you argue that she was in the window period when she was tested, you still have the P24 test results to back you up. A fever and sore throat for 2 days is completely insignificant.
rgds
Dr Tan
Thank you so much! It was very helpful! God bless you and your deeds!!!
Dear Dr. Tan!
I just found out that it was an Elisa test not p24. Does it make any differences?
Thanks
Hi mikeB,
The ELISA test at 25 days post exposure is not accurate. Either go get a P24 test done or repeat the ELISA test at 3 months post exposure.
rgds
Dr Tan
will HIV virus entered in to body, get killed during the window period, evenwithout knowing to us if it is very weak?
earlier symptom of HIV can get eliminated duirng the window period?
Hi ravi,
That is an interesting theory. I have not heard of it. Can you let me know where you read it from?
rgds
Dr Tan
hi Dr. Tan!
I was wondering how reliable is Elisa after 24 days of possible exposure? I had it done and it came out negative
Hi journey,
The ELISA test is not accurate at 24 days post exposure. You really need to get the test repeated at 3 months post exposure.
rgds
Dr Tan
Howmany days required for ELISA TEST to be dependent?
which are the test can misguide during the window period?
any other infection can misguide as HIV?
Hi mani,
ELISA test can only considered conclusive 3 months post exposure. All HIV tests available have their own windows periods. During which time they are inaccurate. The symptoms of HIV are very non-specific and many infections, including the common cold, share the same symptoms as HIV.
rgds
Dr Tan
what is P24 test? how accurate it is during window period?
will it go negative during window period with ELISA TEST?
Hi main,
The P24 test is a test of HIV antigens. It is most accurate between 3 and 5 weeks post exposure.
rgds
Dr Tan
Dr.
what is c4 and c8 testing? will it misguide / wrong interpretation for HIV?
How expensive is P24 test?
Hi mani,
CD4 and CD8 tests should only be used to monitor patients who are already diagnosed with HIV. They should not be used as diagnostic tests. The cost of P24 testting varies between countries and even between clinics.
rgds
Dr Tan
Dear Dr,
I did a p24 antigen and HIV 1 & 2 on the 7 September in gribble malaysia . and my exposure was on the 18 august 2011 .which is 20 or 21 days post exposure. My result came back negative . My question is 20 or 21 days time frame give a accurate and conclusive result as I read from your comment it actually need within 3 to 5 weeks post exposure.
Thanks
Hi KK,
The level of P24 antigen in the blood of a person infected with HIV rises rapidly from 3 weeks post exposure, peaks at about 4 weeks then decends rapidly. It is best to do the P24 test at 4 weeks post exposure. That said, in Singapore, the P24 is not recognised as a diagnostic test for HIV and our Ministry of Health still recommends HIV antibody testing at 3 months post exposure to be conclusive.
rgds
Dr Tan
Dear Dr,
Tested for P24 Antigen and Hiv 1 & 2 on 20 days post exposure and the result came negetive , is it a conclusive report for this test ?
pls help
Thanks
Hi My boy,
Please see my response to KK who is in a similiar situation to you.
rgds
Dr Tan
Dear Dr ,
Thanks for your information .. It now 6 weeks post exposure, if I want to do test again , what is your recommended test ?
I Would like share my exposure to u and expecting your advise:
I have fingering vigina of a sex worker and kissing/licking a girl breast and the Back body . We have no intercourse and oral sex .
Am I on HIV risk ? that why I went for the p24 and HIV combo assay . My doctor told me that according to the lab it can carry the test 2 weeks post exposure .
Thanks
Hi KK,
You are not at risk of HIV. For peace of mind, you should do a HIV antibody test at 3 months post exposure.
rgds
Dr Tan
Hi Dr ,
Thanks for the prompt reply .
Few more questions again ,
Ever since the exposure I have pay extra attention to all the symptoms related to Internet said . About six weeks later I just found two dark or brown color round mark on my hand skin . It no pain and Not itchi . Is there any web site that I can visit to view the picture of acute HIV rash infection .
Many and different of description how the acute HIV look like , some said it reddish and itchi and some said dark or brown color and not itchi . Can please explain !! Although my Dr and you said no specific sympthom on every one .
It high fever will come at the same time as the rash present ? Or other illness ?
Hope to hear from u soon .
Thanks
Hi KK,
Please refer to http://www.drtanandpartners.com/hiv-symptoms-%e2%80%93-early-symptoms-of-hiv/
rgds
Dr Tan
Hi Dr ,
Thanks for everything .
Best regards .
hey doctor waiting for reply
Dear Dr.
A unknown lady had a oral sex on me during massage, removed out during ijaculation. i fiddled with my midle finger on her vegina. i had no oral on her. I did a HIV I/II antibodies ELISA Enzyme Immuno Assay test on 35 days which came negative. I am worried still and having no sleep.
Hi dany,
Your risk of HIV is extremely low. Repeat an ELISA test at 3 months post exposure to be 100% sure.
rgds
Dr Tan
what CD4 & CD8 count and ratio. will it be right method to identify the HIV?
any other infection mislead the ratio or count.
Hi dany,
Please refer to my reply to mani on the CD4 and CD8 count and ratio. In summary CD4 and CD8 cannot be used to diagnosed HIV.
rgds
Dr Tan
thanks dr. for your reply.
Hi Doctor –
I am an expat traveling through Singapore (for a few weeks). I had an exposure 21 days ago. I would like to come in for the HIV RNA PCR. Would a negative be conclusive? What if I combined it with an ELISA?
I do have a significant other whom I do not want to put at risk back in Canada and several hundred dollars is not inexpensive.
Thank you.
By “exposure” I mean unprotected vaginal with a woman of unknown status (condom rupture)
Dear Dr Ihad unproted sex with a sex,after 3 days i went for finger prick test and it was negative.a week,i had rashes,sore throat,cough and headach.after 3 month,i went for finger prick test again and is negative but i still rashes on my chest and is fell unconfortable.please help me
Hi snake,
A rapid test at 3 months post exposure with an accredited and approved test is conclusive. You do NOT have HIV. There is obviously another cause for your rashes. You should see a Doctor for further management.
rgds
Dr Tan
Hi CT1,
Yes. A negative RNA PCR test at 21 days post exposure is conclusive. To be extra sure, you can combine it with a P24 test. I would also suggest you also screen for Gonorrhea and Chlamydia. The risk of catching Urethritis is a lot higher than the risk of catching HIV. Monday morning anytime between 8am and 11am will be a good time to see me. I will be at my clinic at Robertson Walk. You can walk in without an appointment.
rgds
Dr Tan
Dr.
Further to my earlier note (A unknown lady had a oral sex on me during massage, removed out during ijaculation. i fiddled with my midle finger on her vegina. i had no oral on her. I did a HIV I/II antibodies ELISA Enzyme Immuno Assay test on 35 days which came negative. I am worried still and having no sleep.) and your reply (Your risk of HIV is extremely low. Repeat an ELISA test at 3 months post exposure to be 100% sure)
I did one more test on 50th date for HIV I/II antibodies ELISA Enzyme Immuno Assay [E.I.A.] and came negative.
I also did my medical test and results are here below:
Leucocytes Count : 8200 /c.mm 4000 – 10500
Method : Flowcytometry using a Semi-Conductor Laser)
Erythrocytes : 5.26 mill/c.mm 4.5 – 5.5
Method : Hydro Dynamic Focusing)
Haemoglobin : 15.6 gm % 13.0 – 17.0
Method : SLS Haemoglobin Detection)
Packed Cell Volume : 47.9 % 40.0 – 50.0
MCV : 91.0 fl 83 – 101
MCH : 29.7 Pg 27 – 32
MCHC : 32.5 g/dl 31.5 – 34.5
RDW : 12.1 % 11.6 – 14.0
Platelet Count : 241 10 ^ 3/c.mm 150 – 400
Method : Hydro Dynamic Focusing)
MPV : 8.4 fl 9.0 – 13.0
Neutrophils : 64 % 40 – 80
Lymphocytes : 30 % 20 – 40
Monocytes : 04 % 2 – 10
Eosinophils : 02 % 01 – 06
Basophils : 00 % 00 – 01
Band Form : 00 – 04
I am worried still. please advice.
Hi dany,
This does not change my initial advice. Your risk is low but you should test at 3 months post exposure to be sure.
rgds
Dr Tan
Dear Dr.
Further to my test on 35th day, 50th from the date of exposure, on HIV I/II antibodies ELISA Enzyme Immuno Assay [E.I.A.] both came negative. Today 90th day I did the same test and the result is Non-reactive. Is it conlusive, I have no HIV?
Hi dany,
Your ordeal is finally over. It is absolutely conclusive that you do not have HIV.
rgds
Dr Tan
Dear Dr.
I am extreeemly delighted to get this news. I am impressed the way you are handling the quaries and questions, you should continue doing this. apart from the profession this service is very much required for the people. please keep doing this, and let god give you healthy and long life. this is from my heart.
Hi dany,
Thank you for your kind words.
rgds
Dr Tan
I was the receiver during a brief unprotected anal intercourse encounter, there was no climax. After the fact I was told the guy had HIV but was on retrovirals and had an undetectable viral load for years. Had rapid testing in the United States 2 weeks and 5.5 weeks after exposure-both negative. What was my risk and do these tests suffice?
Hi will,
You risk is not high. Multiple scientific studies have shown that anti-retroviral therapy significantly reduces how contagious a person is. Although a rapid HIV test at 5.5 weeks is EXTREMELY accurate, the ethical advice to you is to repeat the test at 3 months post exposure.
rgds
Dr Tan
Dear dr, I had unprotected sex with girl that i don;t trust.I use FIRST RESPONSE HIV CARD TEST 1-2.0 to test for HIV and it turns out negative for the first month,after 90 days of exposure,i used it again and the result is still negative but my worry is that,i have rashes on my chest and on my hands with ichy palms which is making me confuse.pls help me.i willbe greatful.
Hi NEGER 4 LIFE,
I am not very familiar with the First Response HIV Card Test. I do not believe it is FDA approved. Furthermore, many of these rapid tests are known to be user dependent. i.e if you are conducting these tests on yourself at home, you might not be doing it right. Your rashes may or may not be caused by HIV. I suggest you get a HIV test done by a medical professional to be 100% sure. Once you have ruled out HIV, you should see a doctor for further management of your rashes.
rgds
Dr Tan
Dear dr, FIRST RESPONSE HIV CARD TEST according my reseach is approved by FDA and widely used Ghana most of Ghana Hospitals.My guestion is,is 90 days test after exposure enough for one to say he/she is HIV Negative?
Hi NEGER 4 LIFE,
The HIV window period is very much dependent on what test is used. Every test has its own statistics on sensitivity, specificity, results vs seroconversion panels etc. So to answer the question is 90 days post exposure good enough, we need to know what test kit was used. All tests that are FDA approved has to meet or exceed current EIA test standards so yes, 90 days post exposure is good enough to say one is HIV negative.
rgds
Dr Tan
DEAR DR TAN
I did a p24 antigen test on 28september, the result show p24 antigen NOT DETECTED.May i know what is the accuracy of 4 week negative test?Have you ever seen a patient test negative at 27 or 28days post exposure(1st september -exposure)
then tested again at 3 months post exposure and was found to be positive?sorry disturb you again:)
i mean tested again antibody test at 3months and was found positive.
Hi miao,
No, not from my personal experience.
rgds
Dr Tan
Do i need tested again antibody test?
Hi miao,
No you do not.
rgds
Dr Tan
Dr. thank you for your kind reply. I am gaining confident. do we have any test which can deduct at 50 days? or still wait for 90 days to conclude?
Hi dany,
You can do a HIV RNA PCR test at 50 days post exposure. But this test is expensive and I feel not worth your while. You should just wait till 90 days post exposure to repeat a HIV antibody test.
rgds
Dr Tan
thanks for your kind reply. I agree. I will wait till 90 days.
Hi Forum,
I noticed that there are a lot of comments with regards to questions on tests already done. I would assume that the conducting doctor would have and should have answered any and all queries with regards to the tests, its accuracy and implications. I would like to find out from all of you why then would you still seek clarification on the tests? Is it just for an independent confirmation or is there another reason. Please submit your comments to help me understand this better so that I can be of more help to everyone. Thanks!
rgds
Dr Tan
I’m seeking clarification from Doctor Tan because of:-
(1)I know his background on this website. I read his articles and found out He is very knowledgeanle on this issue. Therefore I feel more confident about his reply
(2)He is willing to discuss with me
Thanks Doctor.
Thanks for the vote of confidence.
Hi Dr.
1. I felt many of my country(Malaysia) local clinic regardless of private or government. They are not concern to me as a patient. They sometime not even bother to listen to me whenever i seek for clarification for less than 3 question or some worst, not even bother to look at me. I don’t feel cared by them, how can i put my life on a person who doesn’t care about me at all especially on serious medical advise.
2. You are willing to discuss with me despite you earn nothing from me at all. It is more into voluntary job.
3. You are more professional & knowledgeable than the doctor who i described above. I have confident to you
4. Your article is very helpful and informative.
Dr. i rather pay my money double for your medical advise than my local clinic doctor if my finance condition is good.
dr. It is purely to take your expert advice and view. From the published articles in your website and with your experiance, your reply and clarifications are extreemly good and helpful. I have seen few comments of yours earlier months are very clear and guided well.Please keep clarifying / replying / supporting.
DR, IN YOUR OPINION HOW ACCURATE IS THE BIO-RAD HIV1/HIV2 PLUS O ANITIBODY TEST.
Hi MO,
The test is FDA approved. Similiar to other HIV antibody tests, it is subject to a window period.
rgds
Dr Tan
I GUESS I MAY BE A BIT PERANOID. I WAS WITH A PERSON OF UNKNOWN STATUS IN AUGUST. I TESTED IN NOVEMBER AND TEST WAS NEGATIVE. TESTED AGAIN IN JUNE, STILL NEGATIVE
Hi MO,
You should check the Caps Lock on your computer. You mean August 2010? And you tested negative in June 2011 which is 10 months post exposure. Yes you are being paranoid. Please stop testing. You do not have HIV.
rgds
Dr Tan
Hi Dr Tan
I am from Australia, had a protected oral sex and sex with 2 different girls in June and 16 days ago. Two days ago I went to see doctor to undergo a test kit. The doctor gave me a test so call Determine (not so sure about the brand), it show negative.
1) is it conclusive?
2) the doctor ask me to test again in another month?
3) I had a ulcer in my side mouth which I knew I accidentally bite myself while sleeping few days ago. I read something on some symptom are sore throat. What is the difference between sore throat and ulcer? are they same?
Thanks.
Hi James,
1. It is conclusive for the exposure you had in June but not the one you had 16 days ago.
2. Yes, you defnitely need to re-test after 1 month for the exposure you had 16 days ago.
3. No they are not the same. An ulcer is a break in the oral mucosa, a sore throat is an inflammation of the oro-pharynx. Please refer to my post on HIV symptoms. http://www.drtanandpartners.com/hiv-symptoms-%e2%80%93-early-symptoms-of-hiv/
4. Do not forget to screen for other STDs as well.
5. Since you had protected sex, your risk of catching HIV and other STDs is very low. Kudos to you on always using protection.
rgds
Dr Tan
Hi Dr.Tan
Thanks for your prompt reply. Can you suggest what other STD that I need to screen?
Some background info:-
1) In my whole life I only have protected sex, protected oral sex for sometimes did sometimes no, the last 2 session which in May and 2 weeks plus ago were protected oral sex.
2) I am a Malaysian but migrated to Australia 5 years ago and I am 30.
I know official window period is 90 days. But how come my doctor ask me to retest again in 4 weeks times? That is about 45-50 days. Is it conclusive?
Thanks
Hi James,
Doctors frequently ask patients to test for HIV at 4 weeks post exposure and again at 3 months. This is because the vast majority of HIV postive cases can be identified at 4 weeks. The usual STDs to screen for are HIV, Syphilis, Hepatitis B, Gonorrhea and Chlamydia. How’s living in Aust compared to Malaysia?
rgds
Dr Tan
Hi Doctor
The only good things in Australia is the weather, less polluted. Other than that, so so only. Actually depend on what you like and your need. Tax is very high compare to Malaysia.
Thanks for the info.
1)How about other STD like Herpes, wards?
2)Can a blood test can test out all the STD?
3)what is the different between those rapid approve test and ELISA test?
4) ELISA test only test for HIV?
Thanks.
Hi James,
1. Herpes is spread by skin to skin contact. It is very common and has no medical or clinical implications. Even if you did test positive for herpes, there is no way to tell from the test when you caight it. Furthermore, there is no permanent cure for herpes. So testing for herpes is very academic. In other words, the results will not make any difference. 2. Warts is caused by HPV (Human Papilloma Virus). It is also spread by skin to skin contact. There is no way to test for HPV in men. You just need to look out for wart growths on the skin. 3. Every STD is a unique disease. Some are tested using blood, some urine some swabs. Each STD needs to be tested for independently. There is no one blood test that can rule out all STDs. 4. The ELISA test is a very old test. The approved rapid tests are either similiar to or better than the ELISA test in terms of accuracy. It is also a lot more convenient. 5. ELISA actually stands for Enzyme Linked Immuno-Sorbant Assay. It is a testing technique that is widely used in all spectrums of medicine. It is very well established for testing HIV and a whole host of other diseases.
I really enjoyed my holiday in Victoria/Mebourne.
rgds
Dr Tan
Hi doc. I did the HIV finger prick test at your clinic 5.5months post exposure. As you were engaged with another patient, I was informed by your assistant that ‘i am fine’. Just need some reassurance here doc. I am negative right? And at 5.5 months post exposure, the result is conclusive and as solid as steel Eh? Thanks alot doctor!
Hi Regretful,
A negative test at 5.5 months post exposure is absolutely conclusive. You do not have HIV. Do not even think about it again. From now on please always use protection to avoid the same worry in the future.
rgds
Dr Tan
Thanks alot doctor. It is definitely the first and last time, with or without condoms. I am due for my NS ORD medical and I really hope the past 5 tests done at your clinic, by you is 100% conclusive. Really mindf-ing me.
Hi Regretful,
I have no doubt your NS ORD medical will be fine. Happy ORD.
rgds
Dr Tan
Thanks alot doctor. I wish you success in life and in your career.
Dr. Tan
I did all HIV test and thank god the results went negative, but i have done ANA test which came to positive 1/640.
Please advise what that means and what disease is that as am worried now again and i have no idea whats that.
Hi Going Crazy,
Good that you tested negative for HIV. Remeber to go for a re-test if you are stil within the 3 month window period. ANA stands for Anti-Nuclear Antibody. It is a marker for Auto-Immune Disease. This is too broad a topic to discuss on this forum. You really need to talk to your doctor and ask him why he did the test for you and what are the next steps. You will need more tests to determine the signficance of the ANA results.
rgds
Dr Tan
Hi Doctor,
2 days back, I had sex with a CSW , who mentioned to me, she is clean(but cannot trust, since no evidence).
- I didn’t had sex from past 1 year.
- 2 days back, this lady (CSW) , we had Oral sex, and vaginal sex.
There was no Anal Sex.
- During Oral Sex, Condoms was used.
- During Vaginal Sex also , Condoms was used.
Vaginal sex lasted for less than 1 minute , after which when she moved, I could see , my Penis in Condoms itself, with ejaculation, so it didnt slip.
I made a mistake, and now want to ensure I am fine and move on in life with peace of mind.
HIV RNA PCR test at 12 days, will be conclusive for me to get rid of this anxiety. Pls confirm.
Hi suraj,
Frmo what you have told me your risk is truly minimal. Yes, HIV RNA PCR at 12 days post exposure is conclusive.
rgds
Dr Tan
I had unprotected anal sex with another man a month ago in which I was the inserting partner. It lasted 5 minutes and there was no ejaculation. Around a week later, i had minor flu with fatigue and muscle ache, which lasted around 4 days and then disappeared completely. Two weeks after the incident I developed a severe tooth infection from an existing cavity that has never troubled me before. Could either of these ailments be related to an exposure to the HIV virus? I tested just before the incident a month ago and was HIV negative. Kindly advise.
Hi Jay,
It is very unlikely that these 2 incidents are related to a HIV infection. You minor flu a week post-exposure is too early to be Acute-Retroviral Syndrome. Your tooth infection at 2 weeks post-exposure again is too early to be due to immune suppression (this takes years). That said, your exposure certainly carries significant risk. You should still get yourself tested for HIV.
rgds
Dr Tan
hi dr
i had sex with a call girl 2just for 1 minutes month ago . i use candom . but when i removed candom i tuch the outer side of candom with my left had . i tuch my orgen (paines) with that left hand 1 finger tip just for a 7 sec on the mouth of skin on sex orgen . after i wash my orgen . i m sooo much worrded i also had rapid test at 4 weeks that come negtive i halso had 2 nd test hi1and hiv2 after 7 weeks that come also negtive . i m very worred . tell is is their any chance to get hiv . vie open sore a . i haveing symptom after 8 weeks night sweet and fever 98.8 . tell me what is a real window period . tell me when i wiill get sure repote after how much time help me pleas
Hi parambir singh,
You are being unduly worried. The risk of contracting HIV from your exposure is miniscule. Some might even say there is no risk at all. HIV testing window period depends on what test is being done. That you need to discuss with your doctor. As a rule of thumb, 3 months is sufficient.
rgds
Dr Tan
dr plz reply me fast
dr
plz
Fast as I can.
thanks a lot dr realy thanks
dr but i have few ouestion
1)can i get hiv from women fuiled without sex?
2) is 1 drop liqued of girl cause hiv?
dr i done 2 tests 1 is at 4 weeks and 2 test is at 7 weeks both are negtive
but dr i have symptom
i have thyphod after that i got malira
dr now i have day sweet and night sweet after 9 weeks from 1 days ?i also have 98.8 fever from 9 days
are theise hiv symptom
and i wann to told u that i had sex with call girl just for 1 min
and i check my candom was 100% okey
i touch candom from oter side may b girls fluid touch my left had but i touch my sex orgen upper skin mouth (lips)of that skin just for 5 seciond .but i feel wet on my that finger. but i touch ny orgen just wit front finger tip only . is any opnen SORE PRESENT ON THE FRONT OF ORGEN SKIN ?
YOU know i m sooo worred . plz help me DR plzzzz i request u with fold of hand tell me how much cances to get hiv from open sore ?and tell me is 3 month sufficent for 100 percent sure repote ?and which test is best ?can i ask u agian if i have any doubt ? reply plzzz
Hi parambir singh,
Analysing possibilities, probabilities, risks and symptoms are extremely unhelpful. It will only serve to make you anxious and worried. There is no point recounting the event in every detail and trying to do your own risk assessment. It is of no benefit to you or anybody. As for your symptoms, you should see a doctor. There are many diseases that can cause your symptoms including malaria and typhoid. Do a HIV ELISA test or a HIV Antibody Rapid Test (with an approved test kit) 3 months post exposure. Meanwhile stop thinking about it.
rgds
Dr Tan
Hi Doctor Tan,
This is Ringo.I’ve done my second ELISA test at Day 118 at the same medical lab (full blood screenings medical check up). The first ELISA test was at Day 68. Both test showed the same result.
My potential exposure was on 13 June 2011.(Extraction of blackhead/pimples by needle)
Do you think is it possible that:-
(1) the virus is too little on the needle
(2)and because the virus was come in from the face’s skin
therefore the body may take longer time to develop antibody? Or I can completely stop the test for now on?
I’m still worried because:-
(1) I always have 1/2/3 pimple-like spot on my neck or back or shoulder sometimes stomach since June.
(2)And for the first time I’ve experience memory loss problems for these recent 2 months (eg. I couldn’t recall back what I’ve eaten yesterday and where I put the house key)
Thanks Doctor
Hi Ringo,
A negative HIV ELISA test on day 118 is more than enough to confirm the fact that you do not have HIV. Why would you want to come up with explanations to discredit the test? These ‘possibilities’ have absolutely no scientific basis. You really should accept the fact that you do not have HIV. As for your symptoms, you should see your doctor to discuss them. They can be due to many things. But the one thing I know is that they are NOT due to HIV.
rgds
Dr Tan
Thanks Doctor
dr i had rapid test on 20 days and 2nd test hiv1 and hiv2 on 51 days. boths are negtive.any one thing more
i had done call girl test also 15days after post exposure hiv1 and hiv2 .p24 negtive
but may b her window period are going thats why false negtive come
dr
i m worring because 5days after sex i got thyphoid and after typhode i got malira. and now 9weeks after post exposure i feel low fever every day and fron last 1 day i have sweet on day and night also. i m worred because i feel may be any hiv viruse come from candom to my finger or i touch my paines sex orgen lips their soft tissue and open sore are presend mayb hiv vieuse enter from their to my body . tell me can hiv viruse enter from open sore on orgen skin to my blood? i need ur help plz ?tell is my symptom indicate to hiv ? tell me is their need to me gooo for another test ?
Hi parambir singh,
Please read my article on HIV symptoms here http://www.drtanandpartners.com/hiv-symptoms-%e2%80%93-early-symptoms-of-hiv/. Your symptoms defnitely require medical attention. You should see your doctor for more advice. You need to have another HIV test at 3 months post exposure.
rgds
Dr Tan
is1 drop vergnal fluid enugh for hiv ?
tell me my cances to get hiv from touching candom fluid after tuching my orgen lips ?
and i read in my web sites that window period is 6 month or longer ?
why 90 window period is not sufficent ?who peopele take longer to 90 days to product antibodys ?
tell me after how many days from post exposure i can get 100% percent sure repote ?
thanks dr thanks a lot
Hi parambir singh,
The window period of HIV testing is 3 months post exposure provided FDA approved test kits are used and the test is conducted by a trained medical personnel.
rgds
Dr Tan
Good evening Dr.Tan from Vietnam!
I had unprotected sex with a partner on Mar 10th. I did take Ag/Ab combi test on the 21st and 28th day, both are negative. I also took another anti-Hiv test on the 57th day, test result also negative. All tests are taken at the top lab in Vietnam so I do believe the results. Noted that an anti-Hiv test on the 57th day is quite sound. However, I am having chronic HBV and taking Tenofovir + Lamivudin everyday. My question is: does Tenofovir+lamivudin makes the window period longer?
Can the negative result now (and at the 3th month as standard) be conclusive?
Many thanks
Hi Believer,
Please post your question on http://www.askdrtan.com
Rgds
Dr Tan
hi dr
sorry but i m worred because my fever come high then down ?
some time fever was 99.4 some time 98.7 fever
is this indicate hiv and sorry i dont under stand ur answer english Analysing possibilities, probabilities, risks and symptoms are extremely unhelpful. It will only serve to make you anxious and worried. There is no point recounting the event in every detail and trying to do your own risk assessment. It is of no benefit to you or anybody. i dont under stand this . plz reply my all questions
and tell me percentage how much i have risk to get hive from less then 1 drop precum my sex orgen skin mouth where open sore presend > is 1 drop precum sufficent to survive hiv in blood ?replz plz
Hi parambir singh,
Your persistent fever is defnitely of medical concern. It could be Dengue, Malaria, Tyhpoid, SLE, Leukaemia, Lymphoma or a whole host of other possible dangerous diagnosis. You choose instead to focus on one singular diagnosis of HIV. I’m afraid your priorities are all wrong. Please see a doctor immediately to diagnose the cause of your prolonged fever. What I meant in my previous statements is this: what difference does it make if I say your risk is 90% or 0.001%? Aside from making you even more anxious or giving oyu a false sense of security, it changes nothing. You just have to know 2 things. 1. Your risk of HIV is small 2. You need to get re-tested at 3 months post exposure. But I cannot over emphasize the importance of you seeing a doctor for your prolonged fever first. That takes absolute priority.
rgds
Dr Tan
Dear Dr Tan
me again,I see The Specialist Dr at hospital,my result HIV 1&2 ab-ag (EIA) NON REACTIVE….
THE DR said my test 99%accurat at 5 week post exposure….i show to him my p24 antigen test 4 week post exposure…He said antibody test at 5 week and p24 antigen test at 4 week are very accurate …if still worried can tested again at 3 months…he said like that…Do you think i need for another test?
Hi miao,
What your doctor said is absolutely true. You should have another HIV test at 3 months post exposure.
rgds
Dr Tan
hello dr thanks a lot
dr i done today blood test
doctor say its thypiode . i also done hiv 1 and hiv 2 antibody test rapid test at 9 weeks
tell me how accurite test done at 9 week after exposon
?
tell me is their need to me retest agian at 3 month ?
tell me i also had 3 negtive test 1 st test at 15 days after sex
2 nd after 6 weeks 3rd after 9 weeks … is their any need to me test agian ?
is test after 3 month exposion is dam sure accurit ?
Hi parambir singh,
I’m glad you saw a doctor and discovered the Typhoid infection. Leaving that untreated would have been very dangerous for you. A negative HIV test at 9 weeks is >99% accurate. Repeat a test at 3 months to be 100% accurate. After that, stop testing and stop thnking about it.
rgds
Dr Tan
thanks a lot dr u r realy great
dr
my dr told me that its starting of thyphoid
. dr
what are chances for a false negtive repote after 9 weeks ?
whats accuracy percentage of hiv test after 90 days ?how much sure repote will come after 3 month ? is test after 3 month give dam sure repote ?
dr may web sites say that their are lot of chanceses to give false repote after 90 days is it true ?
Hi doc, would worrying over an 11 week oraquick test be ‘hair splitting”?
Thanks for everything u have done for all of us.
Hi Jan,
Yes, it is. I know the official line for HIV testing window period is 3 months but the fact is numerous studies have shown FDA approved kits like the Oraquick is near 100% accurate at 6 weeks. So 11 weeks is really more then enough. It is a privilege to be able to help and I really appreciate your kind words.
rgds
Dr Tan
dr whats cost price of prc test ? wand what is cost price of p24 test ?and what is cost price of rapied test accoring to you ?
thanks a lot dr
dr
is thypide is symptom of hiv ? and tell when i go for another test today is n week , after how many days from today i go for test ?and when can i get DAM SURE 101% REPOTE AFTER how much TIME ?
Hi parambir singh,
Prices differ from clinic to clinic. We charge S$600 for the HIV 1 RNA PCR, S$200 for P24 Anitgen/Antibody test and S$50 for the HIV rapid test using HIV 1/2 Determine or the Oraquick. Tyhpoid is a disease caused by an infection with Salmoneall Tyhpi, it has nothing to do with HIV. Re-test for HIV at 90 days post exposure using an FDA approved test kit conducted by a trained medical person. As a consideration for other forum users, please refrain from repeating your questions in such rapid bursts. I am running a busy clinic and may not have time to reply your queries instantly. Please be patient. It also helps to read my reponses carefully before posting more questions. You can see that I have answered many similiar repeat questions from you already. By bombarding the forum with repeat questions you are taking away my time to be fair to the other forum users as well as my patients to give everyone’s concerns my due consideration.
rgds
Dr Tan
thanks a lot dr
,,,, do tell me plz is their chance in rapied test after 3 month to give false negtive repote ?
or is their any need to re test agian after 3 month ?
is 3 month test will give DAM SURE repote plz rely my theise questions plzzzzzzz dr
tell me is 3 month is engough to produce antibodys if viruse enter in body in smal amount ? tell how accurate test at 3 month ?according to u is their case in which hiv take long period to produce antibodys ? tell me how accurate test at 9 weeks and 14 weeks after exposion
reply plzzzzzz
thanks A LOT FOR HELP
THANKS
Dr. Tan,
i just want to confirm, Is ANA test used to discover HIV.
or its far away for it. the dr did the ANA test to me becouse i am in process of Kidney Transplant. so all tests should be done at that time. i did HIV test in 5months it came Negative and i did with same Dr the HIV test it goes Negative again. Only ANA test came positive with 1/640 titter. please doc explain to me whats going on even in my personal email.
Please do this favor for me
Thanks in Advance.
Hi Going Crazy,
I am surprised your doctor did not explain this to you. The ANA test stands for Anti-Nuclear Antibody. It is a marker for Auto-Immune Disease and has nothing to do with HIV. The fact that your ANA test is postive should prompt your doctor to do more tests for you to determine whether or not you are suffering from a Auto-Immune Disease. There are many such disease including SLE, Sjogrens, AS etc etc. Again it has nothing to do with HIV.
rgds
Dr Tan
hello DR
. whats hiv window period ?
when i can get accurate ?
is 6 week engough for viruse to produce antibody ?
and can rapied test detect hiv anti body in small number ?
how much accurate can i get after 3 month ?
i tell u my problem i had protected sex with a hiv postive girl .after sex i removed my candom . and i do fingering to girl . i foget to wash my that finger and i touch my cock from front skin with that finger .after i wash my cock with sope. can i get hiv by doing this ?
how much risk i have ?\
telll me everthing in detail. i will be very thankful to you
answer my every question pleas
Hi rana,
Please refer to my answers to parambir singh.
rgds
Dr Tan
Dear Dr Tan ,
sorry again ask you similiar question, what is the title of p24 antigen ag/ab and HIV 1 and 2 ab/ag? is it the samething ?both of these title look for antigen and antibody right?i did HIV 1 AND 2 AB/ AG MENTHOD ECLIA at 3 week post exposure and p24 antigen at 4 week post exposure and HIV 1 AND 2 AB-AG (EIA) AT 5 week post exposure I forgot ask my dr to explain. i did p24 antigen only not combination test (no include antibody)at 4 week post exposure is it really accurate as you provide p24 ag/ab combination..my dr said really accurate at 4 week ,i forgot to ask him this combination test…he does not said i MUST test again at 3 months ,he only say for peace of mind only…i want your opinion…do you think i MUST test again?
DEAR DR TAN
what is the rapid test and EIA test?both these test at 5week post exposure 99%accurate right? if somone did 24 antigen test at 4 week post exposure and 5 weeK did HIV 1 AND 2 ab/ag EIA post exposure do you think these
TWO test can give me 100% accurate…my DR said 99%for EIA TEST AT 5WEEK,then i show to him my another test p24 antigen 4 week post exposure ,he said very accurate but he does not said 100% because i forgot to ask him the percentage of my test. For your opinion what is the accuracy ?
Hi miao,
There is no need to confuse yourself. P24 antigen test at 4 weeks is conclusive. HIV antibody test at 3 months is conslusive. You really need to accept the fact that you do not have HIV. Your anxiety is getting the better of you. I again strongly urge you to seek a psychiatrist consult to manage your anxiety.
rgds
Dr Tan
Hi Dr Tan,
Can you point us to any online-published studies about the window period accuracy of the FDA approved rapid tests?
thanks so much
Gautam
Hi Gautam,
Every test kit will have a product insert. This is always available online in a PDF format. It contains all the technical details of the test including how is performs in terms of sensitivity and specificity. I am acutally planning to publish articles on various rapid tests and their performance characteristics. I should have the article out soon.
rgds
Dr Tan
Dear Dr Tan
Thank you so much DrTan, now i worried syphilis ,idid VDRL at 5 week post exposure NON REACTIVE, i forgot ask my Dr,do you think i need repeat test for syphilis..
Hi miao,
You should repeat the Syphilis test at 90 days post exposure.
rgds
Dr Tan
DEAR DR TAN
Thanks a lot for your help DR TAN
Thank you very much for clearing my doubt…… this fear has been haunting me for many WEEKS!!!!!YOU REALLY HELP ME A LOT A LOT A LOT!…..You really is a good DOCTOR, no one can replace you..And if u don’t mind I will post my results AT 12week the VDRL TEST …. Now I feel EXTREMELY good ,AND MANY thanks AND I’M EXTREMELY sorry for disturbing…
Hi miao,
I’m glad you are feeling better. Please share with us your VDRL results when you have done it.
rgds
Dr Tan
Hi Dr. Tan, this is my second post to you. You answered my first one successfully.
In my Previous post, I had a unprotect with a female who I found out was HIV+.
I went to Planned Parenthood 40 days post exposure (5.7weeks) and tested negative
With rapid HIV finger prick test, not sure which brand but here in NY, it’s most likely FDA approved.
You told me my results were very accurate, but I’m still scared to death cause I have to go back in a few weeks and retest at my 3 month mark. What are the odds of results changing? Have you seen ppl test negative at 40 days then test positive? They also say that 95% of ppl test positive at 4 weeks, so do I fall in that 95% category? and y do some Dr say 6 weeks for first test and to come back in 3 months for second test if 6 weeks is >99% accurate? Should I worry or should I begin to move on? Also keep up the good work on the replies, it shows that u care
Hi Orlando,
Thank you for the kind words. This issue with the HIV window period is a tricky one. It is actually very difficult to conduct large scale scientific studies to determine the window period for each particular HIV test kit. There are ethical issues as well as the fact that people can very well lie about their sexual history and dates of exposure or maybe they just plain forgot. This added to the fact that nothing is ever black and white in medicine. And you throw in Doctor’s fear of litigation and you end up with a whole lot of ‘by-the-book’ answers e.g. >99% accurate. Why not just say 100%? So this is the low down. Most doctors ask patients to test at 4 to 6 weeks because we all know that the FDA approved HIV tests are all accurate at that period. We tell patients to come back at 3 months for a confimatory test ‘just-in-case’. Hope that helps.
rgds
Dr Tan
Yes Doc, it helps alot, not so worried anymore, thank u.
dr plz u tell me agian that what is window period?
what is maximum time of window period ?3 month or 6 month ?tell me i m very canfused
when i can get 100 percent accurate result ?
Hi rana,
Whether the window period is 3 or 6 months depends on the method of testing. I suggest you ask your doctor. He would be most familiar with the test he is using and will be able to advise you accordingly.
rgds
Dr Tan
dear dr, what is the method name (eclia) is this same as elisa?
Hi devil@jun,
ECLIA is an acronym for electrochemiluminescent immunoassay. ELISA is an acronym for Enzyme Linked Immunosorbant Assay. They are both methods to identify antigens. The ECLIA method is newer.
rgds
Dr Tan
tell me plzzz
i m realy canfused
dr plz u tell me agian that what is window period?
what is maximum time of window period ?3 month or 6 month ?tell me i m very canfused
when i can get 100 percent accurate result ?
why some dr say that window period is 6 month ?
Hi rana,
Please refer to my earlier reply to you. I am also very concerned by your extreme anxiety. Your issues are obviously complex and you have many concerns and worries. These are not issues that can be solved via this forum. You really need to discuss this with your local doctor. I would also advise you to call your local HIV or counselling hotline to speak to a trained counsellor.
rgds
Dr Tan
dear dr, if i test as 7 month can 100 percen move on? the menthod is eclia the doctor say hiv can up to ten yrs! is this true?
Hi devil@jun,
A negative HIV test at 7 months post exposure is defnitely conclusive. Regardless of the method. You must not confuse the window period with progression to AIDS. It takes a HIV infection an average of 10 years to become AIDS. During which time, any HIV test will be able to detect the HIV infection. As long as it is after the initial window period of 3 months.
rgds
Dr Tan
Hi Dr
I would like to share with my result again .
I did p24 combo assay on 21 days and 41 days . It’s all negative .
My Dr said he is confident with the test and is conclusive now . I hope it really conclusive because no of days to carry the first test is different from your recommended days (21 vs 28 days ) .
And I decided went for a second p24 combo on 41 days .
My Dr also said first test is 98% accurate and second test was is just Confirmation test (100%) accuracy . Are you agree this from your exprerience on this line ?
How ever From 7.5 weeks onwards , I found very itchi on my skin and scratch it with my finger on that area . It form a rash . Size of rash is just like cause by mosquito bite . two or three spot in 24 hours.
But it’s come down and goes / gone after few hours or within one day . These sign repeating for 4 days until now .My dr said this not cause by HIV as if it come and develop more quantities rashes in 24 hrs and rashes will not goes within few hours or an hour . It usually take 2-3 weeks to disappear .
So Dr , can you tell me more about this .
Best regards .
Hi KK,
I agree with your doctor. You do not have HIV. From your description of the rash, it sounds like Urticaria. However, you should listen to your doctor with regards to the rash. I really am not in a position to comment on your rashes as this requires a proper consultation and physical examination.
rgds
Dr Tan
Dear Dr Tan,
I have a few incidents of unprotected oral (both receiving and giving)around 25 August 2011. I went for a oralquick this morning (around 6-7 weeks after possible exposure) and is negative.
May i also ask if taking Dexamethasone will produce a false negative result?
I came down with this acute throat infection with high fever (39C)from 29 Spet 2011. The fever breaks on 3 October but the ulcers in the throat only cleared around 9 October.
During this throat ulcers infection, ENT doctor gave me Dexamethsone 4mg from 2-5 October, 2mg from 6-11 October, 0.5mg from 11- 15 October.
Will the medication delay the detectable antibodies? As vast majority will have enough detectable antibodies in 6 weeks after incident, will my test result this morning cover incidents 6 weeks ago?
Thankk you
Hi Chris,
There is no evidence to say that Dexamenthasone affects the accuracy of HIV tests. A negative Oraquick Test at 6 weeks post exposure is very nearly 100% accurate. Of course no doctor is going to stick his neck out and say 100% accurate at 6 weeks. But really you are very much in the clear.
rgds
Dr Tan
Hi Dr Tan,
Greatly appreciate you reply. Thank you.
Dear Dr Tan,
This morning I borrow my nail clipper to my friend,I don’t know her status. .After 10 minutes she returns to me, then I clipped my finger nail ,I incautions clipped my finger bleeding..I worried hiv infection..please reply
Dear Dr Tan
I have a habit of using nail clipper to peel of scabs on my fingers.which usually results in bleeding, I always share the same nail clipper to my friends DO you think my habit would out me in danger of being infected my HIV.?If she has it? Or am I just being paranoid?please reply. .thanks
hello dear Doctor
i had protected sex with a call girl
after sex call girl start fingring her self . my b some fuild come on his fingers
after that she give me handjob with that had
can i be effected with hiv by fluid on her had can enter in my blood strem through hand job ?
i m soooo worred
i had test after 7 and half week rapied test that come negtive ?
how accurate test at 7 and half weeks ? should i need another test ?
hi dr u r doing such a grest job
i had protected sex with a call girl
after sex call girl start fingring her self . my b some fuild come on his fingers
after that she give me handjob with that had
can i be effected with hiv by fluid on her had can enter in my blood strem through hand job ?
i m soooo worred
i had test after 7 and half week rapied test that come negtive ?
how accurate test at 7 and half weeks ? should i need another test ??
help meee
Hi sammmmmmmmm,
It is rather obvious you, rana and parmabir singh are the same person. All of you have identical writing styles. There is really no need to do this. All you are doing is making things inconvenient for other forum users. Please stop this or I will have no choice but to mark all your mail as Spam. All you need to do is ask your questions and be patient for the answers. Then read the answers carefully. I put a lot of effort into making my answers succint and informative. There is no need for you to repeat your question over and over again. You will get the same answer every time. Please read this carefully 1. Your risk of HIV is extremely low. 2. A HIV test that is FDA approved and conducted by a trained medical person is extremely accurate at 7 weeks post exposure. 3. You still need to get another HIV test done at 3 months post exposure. 4. Speak to your doctor or a local helpline/counsellor about your troubles. What you really need right now is mental and emotional support.
rgds
Dr Tan
Hi Dr. Tan. I am from Malaysia. I went to a massage parlor and deep fingered the lady’s vagina. I don’t remember having any cut on my finger. Probably perhaps a healing cut, if any. Would I be at risk of contracting HIV from this contact with vaginal fluid, assuming if she was HIV +? I got tested at 4,6 and 8 weeks after the episode. All results were negative. Should I retest at 3 months? God bless your for your good work here.
Hi Xherokee,
Thank you for your kind words. There is really no risk of contracting HIV via Hand/Finger with Gential contact. HIV cannot penetrate intact skin (except the foreskin of the penis). You really need to have a deep cut or a gaping ulcer to have any kind of risk at all. Furthermore, you already tested negative at 8 weeks post exposure. I strongly advise you to stop worrying about this and move on. I’m sure you do not have HIV.
rgds
Dr Tan
thank ! dear dr
Hi Doctor,
Can a person get infected if his penis comes in contact with a infected cloth from a infected person.
Hi agni,
No. That cannot happen. HIV cannot be transmitted via fomites (non-living things eg. cloth, door handles, table tops, toilets, toothbrush etc) or vectors (living things eg. mosquitoes, rats cockroaches etc). Understanding this will help all of us overcome th stigma and fear of HIV.
rgds
Dr Tan
Dear Dr Tan,
Thanks for your reply.
I had an incident with a CSW , she just gave me a hand job,I never had penetrated sex with her(Neither Vaginal nor Anal nor Oral).I am fearing that she might have some vaginal fluid on her hand while she was giving me a hand job,although i came to know through internet stuff that HIV virus cannot survive outside body
I got myself tested for HIV after 4 weeks of the incident and tested Negative.
Do I have a Risk??Do I need to get tested again??
Thanks!!!!
Agni
Hi Agni,
You are not at risk. You do not need to re-test. Stop worrying and move on.
rgds
Dr Tan
Thank you Dr Tan,your answers have calmed my mind.
Thanks and Regards
Agni
Hi Agni,
You are welcome.
rgds
Dr Tan
Dear Dr Tan,
There are few doubts in my mind regarding HIV, kindly clear them
I only had mutual masturbation with the girl(she gave me a handjob and i did fingering),
then she cleaned
my penis with a cloth which i guess might be infected with
vaginal fluid.I never had any penetrative sex with her.
I have compiled the whole event which i asked in parts in the earlier mails.
kindly judge my risk for HIV.
Sorry i’m bothering you again.
Kindly reply.
Thanks!!!
Agni
Hi Agni,
There is no chance of contracting HIV via your exposure. You really should stop worrying. If you need peace of mind, then go get the HIV test done. It is the best way to close off this chapter.
rgds
Dr Tan
Thank you Dr Tan.
God bless you.
Hi Dr Tan,
I had the following tests : HIV ANTIBODIES, SERUM-Enzyme Immunoassay (Rapid) after 52 days of exposure(>7weeks).
The results came out NON REACTIVE.
As you said before that i had no chance for HIV transmission.
Can i move on with my life believing that this is conclusive since i had no risk
and HIV test is also negative after 7 weeks.
And leave this all HIV thing behind.
Kindly reply
Thanks and Regards
Agni
Hi Agni,
Yes you can.
rgds
Dr Tan
Hi Dr Tan,
Just for peace of my mind i got myself tested at 86th day from exposure.
The result came out to be NON-REACTIVE.It was HIV 1 & 2 Antibodies Test.
But it fell short by 4 days from the 90 days mark.Is test at 90 days conclusive??should i get re tested as the test fell short by 4 days.
Thanks
Hi Agni,
Why didn’t you wait another 4 days? Wouldn’t it be easier just to wait a few days more instead of now having doubts about the validity of your test? I do not think you require a retest.
rgds
Dr Tan
Hi Dr Tan,
I had the following Test:
HIV ANTIBODIES, SERUM-Enzyme Immunoassay (Rapid)
After 3 months from Exposure the test
results came as non-reactive.
Thank you doctor for your time and advice
GOD Bless You
Thanks
Agni
Hi Agni,
I’m glad you are OK and free of HIV. Please stay safe from now on.
Rgds
Dr Tan
Hi Dr Tan,
What is the duration of window period for HIV Antibody Testing.Is it 3 months or 6 months .
Because some Testing centers claim that window period is of 6 months and one can get satisfactory result only after 6 months.
I had a HIV ANTIBODIES, SERUM-Enzyme Immunoassay (Rapid) Test after 3 months and the result came out to be NON Reactive.
Do i need to retest after 6 months.
Thanks
Agni
Hi Agni,
We have moved the forum over to http://www.askdrtan.com
Please post your questions on http://www.askdrtan.com
See you there!
Dr Tan
DEAR DR TAN
I called to my Dr to answer ,he blamed me PARANOID..then he answered my que tion..was there blood on the nail clipper?IF YES, HIV outside of the body die within few second to minutes.Hiv needs direct access to enter the bloodstream and nail clipper do not provided that opp ortunity,.Thi is NO risk hiv trasmission..is it TRUE??
please answer me. Thanks
Hi miao,
You doctor is absolutely right. The very fact that you are even worried about this tells me that your anxiety levels are still too high. You can refer to my reply to agni for more information. Aside from unprotected sex, sharing needles and blood transfusion, it is near impossible to get HIV from any other way.
rgds
Dr Tan
Hi, Dr. Tan
I posted a link for the people that have questions
on different test and window period.
This should be helpful.
http://www.hivguidelines.org/wp-content/uploads/characteristics-of-hiv-tests-posted-01-03-2011.pdf
Hi Orlando,
Thank you very much. I hope more people take your lead in contributing to this forum so that we can all learn more about HIV and STDs. Education is the first step towards helping fight fear and stigmatisation. Kudos to you.
rgds
Dr Tan
hello. I had an unprotected oral sex 4 weeks ago, and just went to get tested for HIV and it came back negative. Im not sure what HIV test is used (i went to the health center pathlab Malaysia) but how reliable is this results? i did not swallow the cum, spitting out a few seconds after the ejaculation, and gurgle my mouth, however i may have swallowed some pre-cum. i experienced some diarrhea and lack of appetite, however i do not have fever nor swollen lymph nodes, but i assume the diarrhea could be from a food poisoning, and the lack of appetite is due to the stress and a slight depression i have on the possibiilty of a HIV infection.
Hi Luke,
Unprotected oral sex has a very low risk of HIV. Swallowing the semen does not increase HIV risk. A HIV test at 4 weeks is >90% accurate even for the more primitive tests. If it was done in Pathlab it was probably the HIV ELISA test. I completely agree with you that your symptoms do not suggest HIV. I think overall the chance that you have HIV is absolutely miniscule. You should stop worrying and get tested again at 3 months post exposure just to be 100% sure.
rgds
Dr Tan
I’ve read that HIV some may show diarrhea symptom. May I know how severe the diarrhea is and how long it last?
Hi Luke,
That is exactly the problems with the internet listing ‘HIV Symptoms’. The fact is the diarrhea, fever, sore throat, rash etc that are so called ‘HIV Symptoms’ cannot be differentiated from many other illnesses.
rgds
Dr Tan
Hello Dr. Tan,
9 weeks ago i have engage in an unprotected oral sex. today i got back my results from a rapid hiv test and it turns out negative. is this reliable enough? i only use my mouth to stimulate the penis, and he jerked off the rest.
Hi Moon,
The risk of HIV via unprotected oral sex is very low. A negative test at 9 weeks is extremely accurate. However, the recommended testing window period is still 3 months. It is best to have another test at 3 months just to be sure.
rgds
Dr Tan
hello dr
sorry
plz forgive me
dr today i go local dr clnic
dr told that my risk is low because hive die when it come in conect with air
and dr told me that 6 month window period is outdated
. after 3 month i can get 100 percent ture result
dr tan u tell is this all truth ?
today is 10 week over and 11 week start ?
when i goo for test ?12 week after or 90 days after?
is their any need of test after 3 month ?because 20
after i m going to marry . is their risk ?i m very worred ? is 3 month repote tell me final result? sugesst me ?
thanks a lot? is their need protected sex if my repote was negtive after 12 weeks ?
Hi parambir singh,
Your doctor is absolutely right. Test again at 12 weeks. Once you have tested negative at 12 weeks it is conclusive that you do not have HIV. I wish you a happy and blissful marriage and many many healthy children.
rgds
Dr Tan
Hi DOC,we are greatful for the wonderful work you are doing.my worried is this,i had unprotected sex with a flirting girl and after 4 days of that exposure,i went to the hospital for a test and the result was negetive.i started having dry cough,rashes,ichy palms and feet meanwhile during all these experiences,i still had unprotected my faithful partner.for about 30days all the cough and others are gonne but i started to have persitent headach and rashes on my chest which i am so worried about.Doc,it has been 115days after my exposure to that flirt and i decided to for another test and the result is negative.pls help me.Are these test enough for me say i am HIV negative?
Hi NEVER,
Thank you for your kind words. Your test at 115 days post-exposure is enough to be 100% sure that you do not have HIV. If your symptoms persist you really should see a doctor to find out what’s going on. The one thing we can be 100% sure of right now is that you do NOT have HIV.
rgds
Dr Tan
hi doctor
after unprotected intercourse with my room partner . i got boil under my chin after 2 weeks i squeezed it and used tooth pick to out the pus .boil was huge and golf size ball..whele using tooth pick i got sudden chills and fever and after i wake up in the morning my neck swallon very badly and got fever as well . i feel very dis comfortable after taking antiboties my fever and sweeling gone but still fell uncomfortable and then i searched on internet it shows this the sign of early hiv infection and after thats my life changes ifeel very low every day ..feel very week day by day losing my weight and my neck got stiff . my skin comes dry but after 30 days i did hiv antibody serology test which got negative .and then still i was not satisfied went for other test after dna pcr after 5 days . result i got NOT DETECTED for hiv 1 and 2. are these realiable and accurate result. i m still very worried .cant move with my life . stay home all day and crying..kindly help me what to do now..
i found that DNA PCR PROVIRAL test gives accurate result after 28 days ..however i m waiting for my p24 antigen with antibody test after 6 weeks…i will get my result on monday.
Hi yuvraj singh,
You do not have HIV. A DNA PCR test done after 28 days is conclusive. It sounds to me this might be causing you some clinical depression. You should see your doctor or a counsellor about this.
rgds
Dr Tan
In regards to the HIV DNA PCR test. Is 26 days splitting hairs. I had a high risk exposure on dec 8th and had HIV DNA PCR test done on jan 3 results on the 5th came back negative. I have some swollen glands in my neck and I can barely control my emotions I keep walking in circles. Thank you for all your great work.
Hi john,
Yes it is splitting hairs.
rgds
Dr Tan
THANKS A LOT DR
ITS MEAN
I DONT NEED ANNOTHER TEST AFTER 12 WEEKS ?
YOU MEAN 12 WEEK RESULT 100 ?
MAY B ANTIBODY TAKE LONE TIME THAN 12 WEEK IN MY CASE ?
IS THEIR NEED PROTECTED SEX AFTER 12 WEEK ON MY WIFE ?
HOW MUCH CAN I TRUST ON 12 WEEKS TEST ?
I SOOO CANFUSED ?PLZ HELP ME
IS THERIR NEED PROTECTION FOR MY WIFE AFTER 3 MONTH TEST IF NEGTIVE ?
REPLY PLZ
Hi parambir singh,
A HIV test at 12 weeks is conclusive. I have answered this same question 3 times for your already. You really need psychological help. I strongly recommend that you see your doctor or a counsellor about your anxiety issues immediately.
rgds
Dr Tan
Dear Doc.Tan,
I had an unprotected sexual contact with sex worker about year ago(Sep 2010). I had taken ELISA test exactly after a year on Sep 22 2011. The result was negative.
My ELISA value was 0.094 and cut-off range was Negative < 0.463 < Positive.
Would like to know if this one test is conclusive or do i need to taken furthur tests.
Kindly advice
Hi Pras,
In my experience, ELISA tests are always reported qualitatively i.e. Positive or Negative. A ELISA test negative for HIV at 1 year post exposure is most certainly accurate and you do not need any more tests.
rgds
Dr Tan
Hello Dr. Tan,
About 3 weeks ago, I had unprotected oral sex and the guy ejaculated in my mouth. Tomorrow, I will be taking the HIV DNA Test by PCR With HIV Antibodies by ICMA. Additionally, tomorrow is the 22nd day since exposure. Is 22 days sufficient enough to get an accurate result? Also, contracting HIV via oral sex is a small risk, right?
Hi Candice,
Contracting HIV via oral sex has a theoretical risk of 1 in 20,000. In fact, in some medical circles, doctors feel that it is impossible to contract HIV via oral sex. So your risk is really small. At 22 days post exposure I would think a HIV RNA PCR will be more appropriate than a HIV DNA PCR. You might want to discuss this with your doctor before proceeding.
rgds
Dr Tan
I purchased the test via STDExpresstest.com. So when should I take the HIV DNA PCR? The representative said there is a good chance at 21 days, however, it’s better at 28 days. Do you agree?
Hi Candice,
You purchased aHIV DNA PCR home self test kit? I find this rather unusual and will be sceptical about the reliability and accuracy. I tried to go on STDExpresstest.com but could not find the website. Could you send me the URL? A HIV DNA PCR test should be done at 28 days for maximum accuracy.
rgds
Dr Tan
Sorry about that, it’s http://www.stdtestexpress.com/hiv/ Thank you for your help.
Hi Candice,
oic. It is a home sampling test rather than a home test kit. That makes much more sense. You should stick to 28 days for maximum accuracy.
rgds
Dr Tan
Hi Dr. Tan,
I took the test on the 25th day…I was stressed badly!!! How accurate is the DNA PCR test at 25 days?
Hi Candice,
It is very accurate. Usually for DNA PCR I wait till day 28 for maximum accuracy.
rgds
Dr Tan
Hi dr tan
I had just been diagnosed with active tuberculosis. From the website, i knew that pple with hiv are more prone to tb. I am now warded in the iso ward and am suddenly asked to do a hiv test yesterday. I have sex with licenced sex workers (always with condom) i also need to add that my bmi is always ard 14 since i was a child (ie before exposure) and i had major heart valve surgery done last dec. Are my chances of hiv very high? Please help. I m more worried about my hiv status than my tb now.
Desperate
Hi Jack,
It is not likely for young and healthy people to get TB. There is usually something that is suppressing their immune system. HIV is one possibility. Another possibility for you is that you could be taking quite a few medicines to suppress your immune system after a valve replacement surgery. Or you could have been exposed to the TB bacteria for a porlonged period of time. From your exposure history (i.e. always condom use with licensed sex workers) we can conclude that your risk of HIV is low. I have to be honest with you that because you are a young healthy person with TB, I would also be worried about your HIV status. But I think you will be OK. Please share with us the results of your test.
rgds
Dr Tan
Hi Dr. Tan, quick question, I read that it is 50% less likely for a circumcised man to contract HIV from female to male transmission and that it’s inefficient to transmit HIV from female to male. Please enlighten me on this subject.
Hi Orlando,
It is acutally closer to 60%. i.e. Circumcised men have 60% decreased risk of contracting HIV. This is because the foreskin which is rich in Langerhan Cells, is literally a magnet for the HIV virus. Circumcision removes the foreskin and hence reduces HIV risk.
rgds
Dr Tan
Hi Dr.
I had one minute of penetrative unprotected vaginal sex. I am the female. I had an antibody test at 35 days and was negative. The guy said he was clean as well, but you can never be to sure about his testing time and window period. I tested negative for syphillis, gonnorea, and chlamydia.
I am doing a full STD screening including the antigen test. I’ve read that this antigen test may no longer be accurate, so if its not at this time (6 weeks) does that mean the antibodies would FOR SURE be in my blood?
please help, worried sick.
Hi Anne,
1. You had a negative antibody test at 35 days post exposure 2. You have no other STD. These 2 facts tell me that your risk for HIV is miniscule. In fact, I would go so far as to say there is no way that you have HIV. The P24 antigen test at 6 weeks is no longer accurate. The new generation HIV antibody tests are all accurate at 6 weeks post exposure. Of course depending on what country you’re from, the health authorities will have different recommendations. In Singapore it is 3 months. But this is just health policy. So do not worry and share with us the results of your 6 weeks HIV test. I am sure beyond the shadow of a doubt that it will be negative for HIV.
rgds
Dr Tan
Thanks for the information. Would an RNA and DNA test for HIV be accurate at 6 weeks?
Hi Anne,
Yes. Both will be.
rgds
Dr Tan
Also, in your experinece, do healthier people develop anitbodies quicker than sick people? Or is that impossible to tell?
Hi Anne,
It is impossible to tell.
rgds
Dr Tan
Negative for ALL std’s at 6 weeks and 3 days!
Would re-testing at 3 months tell me anything different or just be advisable for conclusivness?
Thank you doctor!
Retesting for HIV I meant
Hi Anne,
I’m very happy all your results are OK. You need to re-test for HIV and Syphilis at 3 months to be 100% sure. However, the chances that the 3 month test telling you anything different is almost 0.
rgds
Dr Tan
Hi Dr Tan, Thank you for your quick responses.
I am curious as to why you believe me being positive at the 3 motnh mark is close to 0…
1. Is it becasue of the briefness of the encounter? (Would you consider one mminute, one time LOW RISK?)
2. Is it becasue I didn’t contract ANY other STD’s?
3. Is it because I had a negative antibody test at 5 and 6.5 weeks?
4. Is it because healthy people would start to fight off infection earlier than 6 weeks?
If you could please let me know why you and other doctors believe six weeks WOULD likely show a positive result?
Thanks for your time and consideration.
Hi Anne,
Yes to all of the above. Because clinical and scientific evidence shows it to be so.
rgds
Dr Tan
I also wanted to add I have had zero symptoms the entire 6.5 weeks. I understand that a lack of symptoms isnt enough to be sure of a negative result, But mixing that in with everything I have told you, does that further lead you to believe I am, and will remain HIV negative?
(Please answer all questions)
Thanks
Hi Anne,
Yes. And please do not write things like ‘Please answer all questions’. I make great sacrifices both in terms of time and resources to run this forum free-of-charge. I think it is my perogative to answer whatever questions I feel are relevant. By writing things like ‘Please answer all questions’ you sound like I am compelled to do this for you. I would be very happy if you could show a little appreciation and not take this for granted.
Dr Tan
Dr Tan
I am recovering from Dengue Fever. Dengue was confirmed by lab test on Oct 1st and I began feeling better on Oct 7th. I need to do an HIV test for work and was wondering is Dengue fever (recovering from) can cause a false result from an HIV test.
Thanks in advance
Worried
Hi Worried,
Dengue will not affect the results of the HIV test.
rgds
Dr Tan
Hello doctor, one of my friend got white coated tongue and slightly swollen glands on neck from past 2 months and he said to me that, he has licked a lady nipple before 2months…Because of this fear he did the Anti HIV1/2 rapid test after 9weeks of possible exposure and the result came back as Negative..is it conclusive?? Is there any possibility to get infected by this way? Any other STD will form the above mentioned symptom?? Doctor, I am kindly waiting for your reply,..thank you…
Hi Dev,
HIV is found in breast milk. If the lady was actively lactating at the time then there is a small HIV risk. A test at 9 weeks is very accurate but cannot be said to be conclusive. A repeat test at 12 weeks is recommended. There are many diseases that can cause the symptoms. It is outside the scope of an online discussion. Your friend should see a doctor to be properly examined and treated.
rgds
Dr Tan
Thank u doctor, thank u very much for your reply, doctor is there any possibility to change from negative to positive on 12th week?? He said there was no lactating at that moment….he is already scared and stressed…because their family is forcing him to do the marriage at this critical suituation…how accurate the 9th week result in % basis…can he go for marriage with this result?? Kindly anticipating your reply….
Hi Dev,
It is certainly possible but not probable. Whether or not to proceed with the marriage is a very personal decision and I really cannot comment on that. I can just say that the likelihood that he has HIV is extremely low.
rgds
Dr Tan
Thank u doctor, Me & my friend are really thankful to u…I informed to my friend already about our conversation on his problem…he would like to take the test again on 24weeks from the date of exposure. Hope he will come out of this worries soon…Dr. I let u know about his test result on 24th week…thanks a lot once again…and one more final question in your experience, did u see any people got the test result negative on 9th week turns into positive on 12th week? and what is the accuracy of 9th week Anti HIV1/2 rapid test on blood samples??? Thanks®ard.., Dev
Hi Dev,
No. I have not seen anyone test negative at 9 weeks and positive at 12 weeks. I think the FDA approved rapid tests are fully accurate at 6 weeks post exposure.
rgds
Dr Tan
Thank u doctor, thank u very much for your immediate response on all of my doubts…you r doing a great job..I am very very glad to meet u…from the past 10 weeks my friend was out of the world. He decided himself that he got infected with HIV and always worrying about his life and about his family…your great replies gave him a new faith on life…now only I can able to see smile on his face..Thank u very much once again… Thanks&Regards, Dev
Good morning doctor ,
Thank you for replying. one last question can i relay on dna pcr test so do i need any more test ? moreover i will go for counselling today. may be it will help to me. once again thank you doctor for helping me…
regards
yuvraj singh
Hi yuvraj singh,
A DNA PCR test at 28 days post exposure is conclusive. You do not need any more tests.
rgds
Dr Tan
thank you doctor TAN.i really amazed and wonder hw fast you are answering our queries. i have no words and i really thankful to the work you are doing.any how if i can help kindly let me know..thank you
warm regards
YUVRAJ SINGH
Hi yuvraj singh,
Thank you for your kind words. I’m glad I was able to help.
rgds
Dr Tan
is Duo test conclusive after 38 days? thank you
Hi jad khoury,
Yes it is.
rgds
Dr Tan
Hi Doctor,
I had unprotected anal penetration sex with a hiv+ person and a week before that a different partner gave me rectal chlamydia. I went to the doctor 5 days after exposure so thats how I was diagnosed with chlamydia, which would increase my chances of getting hiv the following week, as I have read. I took a Oraquick rapid hiv antibody (prick finger) test at 31 days and it came back negative. I also took a p24 antigen test and am waiting on results. How reliable was the rapid test? And how reliable will the p24 test be?
Hi Sean,
An Oraquick test at 31 days post exposure is extremely accurate. In the region of >99%. The P24 test done between 3 to 6 weeks post exposure combined with a negative rapid test is as good as conclusive. Unprotected anal sex is high risk. I would strongly urge you to use a condom. Stay safe always.
rgds
Dr Tan
HI doctor TAN sorry to distrub you again
i got my report for antibody combo test with p24 antigen…i got result NON REACTIVE….result shows….
index value ——- 0.10
result ——- non reactive
INTERPRETATION
index value = 1.00 provisionally reactive
end
i hope report should be fine…
what does provisionally reactive means ??
kindly help to understand the report
regards
YUVRAJ SINGH
SORRY I DID MISTAKE…
THE ACTUAL REPORT IS LIKE THAT…
HI doctor TAN sorry to distrub you again
i got my report for antibody combo test with p24 antigen…i got result NON REACTIVE….result shows….
index value ——- 0.10
result ——- non reactive
INTERPRETATION
index value = =1.00 provisionally reactive
end
i hope report should be fine…
what does provisionally reactive means ??
kindly help to understand the report
regards
YUVRAJ SINGH
Hi yuvraj singh,
It means you do not have HIV. Provsionally reactive means MAYBE you have HIV but they are not sure. This does not apply to you.
rgds
Dr Tan
once again heaps thank you….
Hi yuvraj singh,
You are welcome.
rgds
Dr Tan
Hey Dr tan
Thanks for the great info.
Just received the results and it came back negative! I was so relieved!
And thanks also for the listening ear.
Sincerely
J
Hi Jack,
You are welcome. I’m really glad to know you are fine. Stay safe always.
rgds
Dr Tan
Hi doctor Tan!I just wanted to inform you that the test after 81 days with a rapid test -negative.For hepatitis B and C also negative.For syphilis do not have any symptoms and this probability falls after so long.I am very happy and I think it was all!Thank you very much for your expert opinion, was very helpful and comforting in these tense moments!I wish you success in professional and personal level!!!
Hi Johny B,
You are very welcome. I too wish you success in every one of your endeavours. Stay safe always.
rgds
Dr Tan
Hello Dr. Tan,
Thank you for your response. to describe you briefly, i had protected sex with a female with 1 minute unprotected oral sex. 1 week later i tested positive for chlamydia & i took the treatment. then after 38 days i got tested for HIV (DUO test, p24 antigen + Antibody) result came out negative. i live in lebanon & we have latest technologies in the medical field. they told me that it is conclusive after 38 days. is it right because i am a little bit anxious. thank you very much
Hi jad khoury,
Hello to you in Lebanon. Greetings from Singapore. The details of your exposure does not matter. The fact is you tested negative on the DUO test at 38 days post exposure. It means you do not have HIV. That is all you need to know. You can stop being anxious.
rgds
Dr Tan
Dear Dr. Tan,
Does many HIV infected people shows signs of symptoms? Majority or minority only shows flu-like symptoms for HIV?
Hi Luke,
About 30% show no symptoms.
rgds
Dr Tan
Hi Dr
Thanks for your reply . I feel great now.
If you don’t mind, for my last and repeated question : in order to understand in detail on your comments ,may I say that p24 combo assay and HIV 1&2 did on 21 days and 41 days with negative resilt is 100 % conclusive and I do not need anymore test on this exposure again .
Regards
Hi KK,
Yes. The tests are conclusive. You can stop testing.
rgds
Dr Tan
Good morning Dr.,
does the Duo test is the same (ag p24 + Antibody anti HIV (1+2)
thank you,
Hi jad,
The term ‘Duo Test’ freqeuntly refers to a test that tests for both the HIV P24 Antigen and the Anti-HIV Antibody.
rgds
Dr Tan
hello dr tan.
If i have a test after 3 months of exposure, is it conclusive?
Hi Maggie,
A HIV test done at 3 months post exposure is conclusive.
rgds
Dr Tan
Dear doctor, it’s almost 12th week to my friend after possible exposure…but yesterday he got one more additional symptom, that is runny nose,slight fever and body pain. Is it related to HIV?? But his 9th week status was negative as u know already…and he feels muscle twitching all over his body from past 8weeks…is it showing any abnormalities in body condition?? Waiting for ur kind reply…thanks in advance…
Hi Dev,
The presence or absence of symptoms, aside from causing great anxiety, does not change the analysis of the risk. Symptoms of acute HIV infection are just too non-specific to be helpful. Your friend’s chances of having HIV are still extremely low. Next to zero.
rgds
Dr Tan
Hi Dr.
After a session of unprotected anal and oral with a lady of unknown status i got UTI. I felt afraid and I went to a Dr and he helped me cure the UTI. Then I felt afraid again and traveled to my country and took HV1 & HV2 AB /P24 test and it came back negative 46 days after exposure. Is this enough i am terribly scared! I feel so much afraid to test again and i am convincing myself that this test will cover either the antigen and antibody so at anytime it should be 100% accurate..i got a family and i live in dubai where HIV+ people are deported. Regards
Hi Toomuchthinking,
The P24 antigen test at 46 days post exposure is not accurate. However, the HIV antibody test at 46 days post exposure is very accurate. However, you should repeat the HIV antibody test at 12 weeks post exposure. Even though I recommend this, I must say that the antibody test at 46 days post exposure is extremely accurate and it is highly highly unlikely you have HIV. Although you have likely gotten away with it this time, I must stress to you that unprotected anal sex carries with it a very significant risk of contracting HIV. You really should use a condom. Protect yourself and stay safe always.
rgds
Dr Tan
thanks Dr for the promp reply…
I am just afraid the results gona change and psychologicaly i feel afraid to repeat the test. Need your help badly on that..how much % you really believe that there is a possibility that this gona change?
Regards and thanks again
Hi Toomuchthinking,
The test results are not going to change. You can post your results here to prove that I was right.
rgds
Dr Tan
I appreciate all your devotion to us Dr. I forgot to tell you two things. 1-the test report that came back as negative also has another word in the result “out of range”..what does this mean.
2-I called the hospital and they told me that the test they did uses chemiluminescence tech. What does this mean?
Best regards sir have a nice day
Hi Toomuchthinking,
1. Out of Range means it is either too high or too low for the machine to detect. Since your test was negative, I assume it was too low. 2. It is the testing method they use.
rgds
Dr Tan
Dear Dr,
Thank you very much for your prompt response .
I’m feeling very good now .
Your extra effort spending on this forum is really appreciated and information is very helpful .
Best regards
Hi KK,
Thanks for the kind words.
rgds
Dr Tan
hey doc
you say that transmission of hiv through oral sex is very unlikely. can you explain why is it so? CDC says it is tranmittable, or is it because CDC doesn’t want to take any risk, hence place a stern finger in oral sex and hiv?
Hope this may help you.
http://www.medhelp.org/user_journals/show/154498/Can-I-get-HIV-through-oral-sex
Hi Shawn,
Thank you. I’m sure the other forum users will find this very useful.
rgds
Dr Tan
Dr Tan,
I understand that you are very professional in STDs.
I rather know that you are very busy in clinic and you don’t have time to answer
theoritical questions.
The article is just purely to share out with peoples who are being anxiety to oral sex.
Dr Tan, Do you consider to change the layout into forum?
Your blog is very informative but the content not really manageable.
Sorry if I offended. Yet, I guess you are the first doctor to have free questions open to public regarding STDs problem in Singapore.
I personally respect to your contributions
Hi Shawn,
You must have misunderstood me. I am not offended at all. In fact, I greatly appreciate you sharing the link with us. As the Chinese saying goes ‘There is always a higher mountain’. I am always interested in learning more about HIV and STDs and I think all of us can learn a lot from each other. I am a doctor and have no knowledge in IT matters. I appreciate your input about the layout. I will talk to my website designer about changing it into a forum. Thank you for your kind words.
rgds
Dr Tan
Hi Dr. Tan
I’m scared to death, if u read my first post, I had a high risk exposure with a HIV+ female and tested negative 5.7 weeks or 6 weeks post exposure. But I’m still scared cause I have to retest and I don’t want results to change. Need a lil reassurance
Hi Orlando,
I have never seen anyone test negative at 6 weeks then positive later. The 12 weeks test is really a ‘just-in-case’ test.
rgds
Dr Tan
So u think I should b good?
Hi Orlando,
I’m sure you’ll be ok.
rgds
Dr Tan
if a 4 weeks test negative, den 12 weeks ltr positive, is it commonly seen?
Hi Luke,
Not common but definitely possible. A rough estimate would be 5%.
rgds
Dr Tan
dear dr 7 month test negative is that 100 percent no hiv?
Hi devil@jun,
Yes. Defnitely conclusive.
rgds
Dr Tan
Hi Dr Tan,
I noted that you mentioned testing at 6 weeks a couple of times. How safe am I if I had some exposure: unknown woman licking (not sure if she had mouth ulcer) my ear and face (there was a pimple there) and I did oral OraQuick testing at 5 weeks with neg result?
Hi nattokun,
First of all you have absolutely no risk of catching HIV. I know you will probably say ‘what if she had an ulcer? what if i had a small cut on my face? what if her saliva went into my ear? etc etc’ But the fact remains you are at NO risk of HIV. The only reason you should test is for your own peace of mind. For that reason, test at 12 weeks post exposure.
rgds
Dr Tan
dear dr ,7 month really no need to retest ? is this 100 percent clear? pls help me dr !
Hi devil@jun,
Your first post was at 8:56pm and you re-posted at 1135pm. Presumably because I have not responded. I work hard but not that hard.
rgds
Dr Tan
Hi Dr Tan,
is a HIV rapid blood test done at exactly 4 weeks accurate?
Hi .,
No it is not.
rgds
Dr Tan
Isn’t a Oraquick rapid hiv test at 4 weeks accurate?
Hi Sean,
It cannot be presumed to be 100% accurate at 4 weeks post exposure.
rgds
Dr Tan
So what do I need to do now? Do more test or wait until 2nd month?
Hi .,
Repeat a test at 3 months post exposure.
rgds
Dr Tan
Should I do a p24 duo test? Today is 32 day. How much is it?
Hi .,
A P24 Antigen/Antibody DUO test at 32 days post exposure is conclusive. It costs $200 at my clinic.
rgds
Dr Tan
Hi Dr Tan, I have done the determine duo rapid blood test. Result is negative. Do I need to do any more antibody rapid test later on?
Hi .,
At what point post exposure did you do the Duo test?
rgds
Dr Tan
I did the duo test on Day 32.
Hi .,
That is conclusive. You do not need to re-test.
rgds
Dr Tan
Hello Dr.,
i tested negative with the Dual test at 5 weeks. should i repeat the test at 3 months? thank you
“DUO Test”
Hi Georges,
A DUO test at 5 weeks is good enough. There is no need to repeat the test at 3 months.
rgds
Dr Tan
hey doc.
i saw the post u say that u have never seen anyone came in negative at 6 months, positive in 12 months. so, my exposure after 9 months, cam back negative, is it okay for me to start moving on with my life?
Hi Moon,
3 months post exposure is good enough. 9 months is much more than necessary. You should really forget about HIV and move on.
rgds
Dr Tan
thank you doc. I keep hogging on the mind of continue to pursue my career in medicine, but HIV held me back whether i should or not. I guess it is safe for me to conclude my path is cleared again to pursue my dreams.
Regards
Hi Moon,
A medical career is not an easy one. It is full of challenges, very hard work and the remuneration can never compare with bankers and businessmen. However, the rewards are also unique. I wish you all the best in your endeavours.
rgds
Dr Tan
Dr. Tan,
How accurate is a RNA PCR HIN-1 test at (8)weeks post exposure? Are RNA PCR have a history of false positives?
Are any RNA PCR test available for HIV-2?
Which test is more accurate and accountable; RNA PCR or DNA PCR? If you had a patient who was recently expose to HIV which PCR test would you give?
Thanks, Ocean
Hi Ocean,
A HIV-1 RNA PCR is conslusive at 8 weeks post exposure. Just like every medical test, it has a possibility of false positives. Yes, RNA PCR is available for HIV 2. Every case is unique. I cannot comment on which test is most appropriate unless I have had a formal consultation with the patient.
rgds
Dr Tan
Thank you Dr. Tan,
I wanted to ask you about HIV-1 RNA PCR test of any history of false negatives at 8 to 10 weeks testing?
Regards, Ocean
Hi Ocean,
No there isn’t. A HIV infected person will have literally millions of copies of the virus in his/her blood at that time that can be easily picked up on the RNA PCR.
rgds
Dr Tan
Hi Dr. Tan, I went for my 10 week test today and results r negative. Dr said she doesn’t think I need to restest. So I close this chapter of my life. Thank u for your help.
Please post that link I posted about minimum window period for different tests. I think that will help with alot of your comments.
Also my Dr. Said she believes in the 6 week window period but has to stick with CDC rules n regulations. she said 97% will test pos by 6 weeks but they have to account for that 3% that may take longer to seroconvert, so that’s y it’s 3 months.
Note: to anyone reading this comments, this applies to U.S. clinics
Hi Orlando,
I have already posted the link you provided. Thank you very much. Your Doctor is very candid and I absolutely agree with her. I’m glad this ordeal is over for you and wish you all the best for your future. Stay safe always.
rgds
Dr Tan
My question is if HIV test on a pegnant women is accurate? I got tested after 7 months after the last exposure, and at three months pregnant with the father of my baby who was virgin. It came out non reactive should I re test
Hi Vv,
Pregnancy does not affect the accuracy of the test. A negative test at 7 months post exposure is conclusive. You should not think about it anymore and you certainly do not need to retest. Congratulations on your pregnancy.
rgds
Dr Tan
Good morning Dr,
i went for a test 5 weeks post exposure & the result came:
ELECTROCHIMILUMINESCENCE
Ag p24 + Anticorps anti HIV (1+2): Negatif
i thing its the duo test.
do i need to retest ?
it looks for p24 & antibodies. The professor in the Laboratory told me its conclusive after 5 weeks & no need to retest.
Hi Georges,
A combine P24 antigen and antibody test at 5 weeks is conclusive. You do not need to retest.
rgds
Dr Tan
Hi Dr,
i asked the laboratory now & they told me that the test detect the p24 antigen + antibody & its very accurate & i may retest at 3 months if i want to relief my anxiety.
hi dr,
Every test that detects p24 Antigen + Antibody anti HIV is very accurate after 5 weeks?
sorry for bothering
thank you
Hi Georges,
Yes. Presuming it is an approved test. Of course the same cannot be said about fake tests.
rgds
Dr Tan
Hi,
I did an ELISA antibody and antigen HIV test at 9 weeks after exposure. I also did hep b elisa test at 9 weeks after exposure. Both negative. Do I need to repeat any of these tests? The lab technician informed that a repeat at 12 weeks is needed for peace of mind.
Thank you.
Hi Worried,
The lab technician is right. You need to repeat both tests at 12 weeks post exposure to be 100% sure.
rgds
Dr Tan
Hi Dr Tan,
I went to a KTV lounge about 11 weeks ago. The girl licked the inside of my ears and I kissed her boobs. I also fingered her and think I ate a sweet after that without having washed my hands. I also shared a cigarette with her. We also kissed on the lips for a brief moment without frenching. 2 weeks ago, (about 9 weeks post-exposure), I had a fever with body aches and a sore throat. The fever and body ache cleared up after 2 days. My sore throat was fine after 2 days too but there was swelling in my throat for about 1.5 weeks. Am I at risk of HIV? I am really worried.
Sorry doc for bothering. I forgot to mention that I sucked her nipples.
Hi Worried,
Doesn’t make a difference.
rgds
Dr Tan
Hi Worried,
I see this nick used a lot. I think you are the 3rd or 4th different person to identify himself as ‘worried’. Regardless of your symptoms, you are not at risk of HIV. Since you are so worried, I suggest you go for a HIV test just to clear your head. I have no doubt the test will show you do not have HIV.
rgds
Dr Tan
Hi,
I had a relationship from June to July end. The relationship involved unprotected oral (always) and unprotected vaginal (2-3 times out of 14-16 times). My gum is in good health. But, it very rarely bleeds while brushing a bit hard. I have no ulcers in my mouth also. I took duo (blood withdrawal) at 5.5 weeks after intercourse and turned out negative. However, two or three weeks before I took the test, I engaged in vaginal fingering for a couple of times with the same partner. I might have even licked my finger in one of the episodes. I have not exhibited any symptoms like rash or fever. But, even if I feel the slightest itch in my throat I am freaking out!
I also did another DUO test at 9 weeks after last intercourse and at 30 days after the fingering episode. This was also negative. I also tested negative for hep b at 9 weeks after intercourse and 35 days after fingering episode.
Do I need to be worried?
Thank you for the forum and reply.
Hi Very worried,
Again you have chosen a popular nick. Your nick should now change to ‘Very Relieved’ because I am sure you do not have HIV. A DUO test at 5.5 weeks post exposure rules out the intercourse episode. A DUO test at 30 days post exposure rules out the fingering episode. Instead of worrying about Hep B I suggest you just go get yourself vaccinated.
rgds
Dr Tan
Dr. Tan,
Whats the percentage accuracy of a OraQuick ADVANCE Rapid HIV-1/2 Antibody Test 31 days post exposure?
Hi Curious,
I would put it at >95% accurate.
rgds
Dr Tan
Hey Dr,
i saw some post that made me ask you a question please. as i told u before i did Combined Antibody Anti HIV + p24 antigen test using ECLIA method 38 days after exposure. Is this method approved? the test was done in the best & certified laboratory in the country.
should i forget the matter & go on with my life?
thank you so much
Regards from LEbanon
u know it cost me $ 20 for the test in Lebanon
Hi jad,
That’s cheap. Things are very expensive in Singapore. Can you imagine that a small Japanese car can cost more than $100,000 in Singapore?
rgds
Dr Tan
Hi jad,
The fact is a combined HIV P24 Antigen and Antibody test done at 38 days post exposure is enough to conclude that you do not have HIV. Don’t bother about whether it is approved or not. That is just policy decided by politicians and does not make a difference to the results.
rgds
Dr Tan
i will go on with my life now. thank you for your support Dr. wish u a great life.
Take care
hello dr
dr 10weeks 4 days after i ask call girl fir test we go to lab
and rapied test come negtive of call girl . i m very worred may b her window period are going ?
plz tell me is their any risk to me hiv ?
tell me how accurate test at `10 weeks and 4 days ?
may be that call girl dont have hiv ?may b she is in window period ?
i have low fever thats why i m sooo worred
help me plz
12 days left in my marriage help me plzzzzz
Hi parmabir singh,
At least she tested negative and not positive. The results of her tests do not make any difference to your current situation. She tested negative and that’s that. There is no point wondering if she is in the window period or not. What good would that do except make you even more worried?
rgds
Dr Tan
sir i m very worried because only 12 days left in my merrage and . its my 12 week going .and i test for thypode and malaria my dr say every thing is ok now but still i feel low fever after mid day
. dr plz suggest me is their any need of any more test in my case ? because of calll she is still negtive ?can i dooo sex with my wife if my test was negtive on 12 week ?
is their any risk of hiv to my wife from me ? is antibotic make effect on my test repote ??????????may b my body can take more than 3 month to make enogh anti body for detection ?
tell me plzzz
Hi parmabir singh,
Please go see your local doctor or counsellor for psychological support. It sounds to me you are suffering from Clinical Depression and Generalized Anxiety Disorder. These are serious medical conditions that can adversely affect your life. You need professional medical help right now.
rgds
Dr Tan
Doctor Tan,
Just share with u my experience with the very well known Beauty Centre that I visited on June. Their spokespersons are those superstars.
Since I’ve paid few thousands (probably 5 digits including the products) so I visited this one stop beauty centre again on 20 Oct.
I did slimming massage treatment on tummy and other parts this time. I noticed the hands of that 20 something chinese therapist who massage my tummy are full of pimple-like red spots from the expose part( I guess more than 30?).
Of course I complaint this issue to the branch manager. But I’m very disappointed of her attitude. Because she said some people will have this kind of red spots. It’s normal =.=!!!
But 3 of her staff said :-
(I did the fact finding first b4 making the complaint)
The therapist herself 1- allergic to food
Other therapist 2 – because of (1) allergic to thier own products
Other therapist 3 – (1) is allergic to air =.=!!!
So at the end the manager claimed that Doctor also dont know what happened so it could 3 of the reason above. But she assured definitely not skin disease! =.=!!!
They keep telling lies!!!
For whatever reason they shouldn’t let the therapist 1 has any skin contact with the customer. Am I right?
Thanks Doctor Tan
Dr. Tan,
How accurate is a 32 day Western Blot Test?
Hi Ummm,
A Western Blot test should not be used as a screening test. It is only used as a confirmatory test when screening tests e.g. ELISA, ECLIA tests are positive.
rgds
Dr Tan
hi doctor
first sorry for my English language !
I had protected sex before 4 month , then i had a negative test after 8 weeks and a negative test after 13 weeks
so do you think i must re-test after 6 month because CDC recommended test after 6 month ( what is type of people recommended to test after 6 month ) ?
best regards
Hi Amr,
It really depends on what tests you are doing. The newer HIV tests are all accurate at maximum 3 months post exposure. It is only the very old tests that require up to 6 months. The only other situation where we test up to 6 months is after prescribing PEP. Furthermore you had protected sex which places you at an extremely low risk of contracting HIV.
rgds
Dr Tan
thank you doctor my test is Elisa (3rd generation )
Hi Amr,
In that case 3 months post exposure is more than enough to be 100% sure.
rgds
Dr Tan
Dr. Tan,
How accurate is a Wester Blot Test taken at 32 days?
Dr. Tan,
How accurate is a Western Blot Test taking at 32 days?
Hi Sean,
Seriously? The same question at 4:16am, 5:34am and 6:10am? I am truly flattered you think I either work 24 hours a day or wake up at 4am to start work. The Western Blot is a confirmatory test. It is not, and should not be used as a screening test. A Western Blot result is meaningless without a positive screening test e.g. ELISA result.
rgds
Dr Tan
dr i dont understand the mening of
At least she tested negative and not positive. The results of her tests do not make any difference to your current situation. She tested negative and that’s that. There is no point wondering if she is in the window period or not. What good would that do except make you even more worried
… plz tell me mening of this
Hi parambir singh,
If you cannot understand than there is a language barrier. Anyway this forum is of no help to you anymore. What you need is to see a psychiatrist. Go see your doctor straight away before you do anymore harm to yourself.
rgds
Dr Tan
dr what u mean by Please go see your local doctor or counsellor for psychological support. It sounds to me you are suffering from Clinical Depression and Generalized Anxiety Disorder. These are serious medical conditions that can adversely affect your life. You need professional medical help right now. i dont understant tell me plz
. do i need retest afret 3 month test negtive ?
Hi parambir singh,
I mean you need to see a psychologist right now. Please do that right now. Go and see your doctor immediately. Tell him you need psychological help. This forum cannot help you anymore.
rgds
Dr Tan
ok thanks a lottttt drrrrr
u r realy greattttttt
dr tell me last me is their need re test for hiv after 3 month negtive ?
tell plz this is my last post plz tell me
Hi parambir singh,
A HIV test done with an approved test kit by a trained medical professional is conclusive at 3 months post exposure. There is no need to re-test.
rgds
Dr Tan
“It really depends on what tests you are doing. The newer HIV tests are all accurate at maximum 3 months post exposure. It is only the very old tests that require up to 6 months. The only other situation where we test up to 6 months is after prescribing PEP. Furthermore you had protected sex which places you at an extremely low risk of contracting HIV.
rgds
Dr Tan”
doctor my test is Elisa 3rd generation ?
Hi Amr,
ELISA is conclusive at 3 months post exposure.
rgds
Dr Tan
Dear doctor, the white coated tongue can cause swollen glands on neck? and also there is something like mucus is present in stools accompanied with constipation…the white coated tongue is recurring after some times of last cleaning and the throat is very painful…is this the symptoms of primary HIV infection?? And one more thing is my mouth can’t produce enough saliva..it’s frothy, sticky…can I consult with ENT specialist or gastro specialist? I am very confused…please give me some idea…I am on real panic about HIV…because most of the symptoms I faced but my test result at 9th week is negative..I am really scared to take the next test…. From Dev’s friend…
Hi Dev,
You can read about my comments on early symptoms of HIV here :http://www.drtanandpartners.com/hiv-symptoms-%e2%80%93-early-symptoms-of-hiv/. There is no way to tell if someone has HIV or not from symptoms alone. You should see your local GP about your symptoms. He will be the best judge as to what further medical management you require.
rgds
Dr Tan
Dear Dr Tan,
My previous post shows i have tested for HIV negative 4 months after possible exposure of HIV through oral sex. I have shown no symptoms as i could recall and tested negative for other STDs. Can I move on with an ease in mind that i am not infected?
Hi Luke,
A negative test for HIV at 4 months post exposure is conclusive. Please forget about it and move on.
rgds
Dr Tan
Im sorry doc, i meant 4 weeks. can i move on?
Hi Luke,
4 weeks is accurate but not 100% accurate. Repeat the HIV test at 3 months post exposure.
rgds
Dr Tan
but is 4 weeks after exposure enough information for me to move on?
Hi Luke,
What test did you do at 4 weeks? I need some context. There are just too many posts for me to remember details.
rgds
Dr Tan
ELISA test. i mean, im jus asking whether 4 weeks post exposure is enough for me to say im negative?
Hi Luke,
4 weeks on an ELISA test is not sufficient to be conclusive. You should repeat the test at 3 months post exposure.
rgds
Dr Tan
Dear doctor Tan,
Iam a 21 year old mother of 2, I had unprotected vaginal sex on August 19th the incounter was no longer then a minute and there was also no ejaculatei then had a minor rasg on my face around 2weeks after. I then tested at a private clinic with the hiv1/2 duo and p24antigen test at (19th Sep) 30days witch came out Negative ever since I’ve been gettin scared still I then realised I had a pain on 1 side of lower pelvix area so desided to do the hiv rapid test at my local sexual health clinic on the 18th October which aalso came out negative. I now have a very dry scalp with somewhat and aalso a small hard bump behind my right ear which may be a swollen lyymph node.(23 Oct) Iam terrified that the tests may. Not have detetected the virus please help me am I just scared? And how accurate are the tests I’ve done? Also can lymph nodes swell due to stresss?..
Thank you for your time please reply as soon as you can
Hi frightend 2 death,
There are 2 seperate issues here 1. HIV 2. Your sypmtoms. You cannot confuse the 2 issues. 1. You tested negative for HIV at 2 months post exposure (18th October). This is as good as 100% conclusive. I am obliged to tell you to re-test at 3 months post exposure but the chances of that test result being any different is close to zero. 2. Your symptoms of pelvic pain and swollen lymph nodes could indicate other infections such as Chlamydia, Gonorrhea and Syphilis. It is very very important for women to get screened for these diseases as they can often be asymptomatic and cause a lot of serious problems if left untreated. Of course your symptoms may not be related to STDs at all. In conclusion 1. Your HIV tests are close to 100% accurate. Repeat the test at 3 months post exposure to be 100% sure. 2. See your doctor about the other symptoms. This is much more important than worrying about your HIV right now.
rgds
Dr Tan
Sorry may I correct my self I ment to ssay on my left ear not my rrigght.
Thank you doctor, u didn’t mention how accurate the hiv duO annd p24 antigen was at 4 wweeks and 2daays please can u do so. Thank you
Hi frightend 2 death.
A HIV DUO test at 4 weeks and 2 days is also conclusive.
rgds
Dr Tan
I ssaw my doctor and she said it was a tiny sweliing and that it was due to what’s happeninn in my scalp, she also said it has nothing 2 do with a hiv symptom and I should resr my mmind.
Dr tan,
Press on because many other patients who are at risk of HIV needs you to give them sound and professional advices on what to do next. I believe many people found a peace of mind after your word of advice so don’t give up Eh!
Netizens, pls allow dr tan to have enough time to reply your questions. This is a voluntary service and he is not obliged to do this, so show some appreciation.
Btw dr, do you, by any chance, know the hiv test used for pre-ORD medical and how long will the drawn blood be kept before they use it for the test? Thank you! Feeling confident abt the results but can’t help thinking grrr
Hi Regretful,
Thank you for the encouraging words. The test used for pre-ORD is the ELISA test. The test is usually conducted on the same day or the day after the blood is drawn. It really makes no difference. The fact is you do not have HIV.
rgds
Dr Tan
Thanks for the comforting and reassuring words doctor!
Hi Regretful,
You are welcome.
rgds
Dr Tan
Hi Dr Tan
I had a sex with a woman of unknown status in the UK & got myself panic stricken with fear of infection. I developed mild folliculitis on my upper arms at 4 weeks and a sore throat at 7 weeks. I tested at 30 & 50 days with a duo (p24 & antibody) test, and determine rapid tests at 70 & 80 days. All negative. Can I move on from this now? It was unprotected oral and protected vaginal. Thank you.
Hi alwaysworried,
Your DUO test at 30 days and Determine rapid test at 80 days post exposure are both conclusive. You do not have HIV. Forget about this and move on.
rgds
Dr Tan
Thank you for your reply Dr Tan. I have also tested negative on a rapid Determine test at 115 days. Can you tell me the accuracy of these rapid tests? Are you certain no more testing is needed?
Thank you again.
Hi alwaysworried,
A rapid Determine test at 115 days post exposure is absolutely 100% conclusive. You definitely do not need anymore HIV tests. My suggestion to you is to accept that fact that you are free of HIV and move on with life.
rgds
Dr Tan
Hi Doctor Tan,
i like to enquire, at post exposure 2 weeks i notice that i been feeling itchy and small dots (some dark color) (mostly skin colour) have been appearing on my skin. what could this be due to?
Hi itchy,
Making a diagnosis on a rash is a very visual excercise. Even amongst doctors we find it difficult to describe a rash properly to each other. We have to be aware that there is a good chance the rash has nothing to do with your exposure. You really should see a doctor to get the rash properly diagnosed and treated.
rgds
Dr Tan
Hi Dr.Tan,
I used the same nick three days ago and had the following post:
I had a relationship from June to July end. The relationship involved unprotected oral (always) and unprotected vaginal (2-3 times out of 14-16 times). My gum is in good health. But, it very rarely bleeds while brushing a bit hard. I have no ulcers in my mouth also. I took duo (blood withdrawal) at 6 weeks less two days after intercourse and turned out negative. However, two or three weeks before I took the test, I engaged in vaginal fingering for a couple of times with the same partner. I might have even licked my finger in one of the episodes. I have not exhibited any symptoms like rash or fever. But, even if I feel the slightest itch in my throat I am freaking out!
I also did another DUO test at 9 weeks after last intercourse and at 30 days after the fingering episode. This was also negative. I also tested negative for hep b at 9 weeks after intercourse and 35 days after fingering episode.
I have two concerns:
- The lab technician said that i still need to repeat the test at 12 weeks for conclusive result. do i need to? I read that even that the 12 weeks test is 99.9% accurate it is considered conclusive whereas the DUO which is 99.9% accurate at 28 days requires a retest. So what is the reason behind the retest of DUO?
- I did not understand you reply to my hep b question. I did an ELISA test (i believe anti body and antigen) after 9 weeks of the intercourse case and was negative. Do I need to repeat the test? The lab technician said that after 5 weeks there is no need to repeat.
Thank you very much.
Hi Very worried,
Lab Technician? Isn’t there a doctor to interpret your results for you? “99.9% accurate” is a term favored by people who are either not confident enough in their knowledge to commit to 100% or afraid of litigation. Please quote the source from which you read this. Is it from a reliable authority on the subject? I was clear enough in my previous reply. Your tests for HIV are conclusive. I am sorry but I really do not feel that I need to jusitfy my answers just because a lab technician told you something different or you read something from an unkown source. You can choose to believe me or not. The choice is yours. As for your hep B, what I meant was you do not have hep b and you do not need to repeat the test but you should get vaccinated against hep b.
rgds
Dr Tan
Hi Dr Tan,
Thank you for your reply. I did not mean to question your response, it just that I am very anxious. I believe that now I am very relieved. Thank you very much.
Regards,
Dear Dr.Tan
24 days ago I was intimate with a boy with whom I had no vaginal, anal or oral sex, but on occasion he touched my vulva with the tip on his penis and there might have been some precum on it. After that we did mutual masturbation. Three days later we both got tested for HIV (third generation antibody test for HIV1+2), HbsAg and antiHCV and we both turned out to be negative. I need to mention that I am from Macedonia but we got tested in a modern private lab which is under regular monthly external control from EQAS in the USA (To make this sure I talked to the the lab owner, a medical biochemist). The boy claims that he hasn’t had sexual contacts of any kind for more than a year. Still, I am very paranoid and anxious and scared and want to get tested again, better sooner than later.
So the question is: Which one is more accurate- a Fourth generation antibody test at 4 weeks after exposure or third generation antibody test 6 weeks after exposure? How big was the risk of contracting HIV in the first place even if the boy was HIV positive?
I study medicine but I have difficulty focusing on my studies… I will really appreciate your help.
Thanks in advance
Hi GirlWithObsessiveCompulsiveDisorder,
Very unique nick. Greetings to Macedonia from Singapore. First of all your exposure carries with it a very small (some doctors would even say zero) risk. The volume of inoculum (precum) is extremely low. Furthermore, it was exposed to keratinised skin (vulva) as opposed to mucosa (vaginal wall, cervix). All this is assuming that your partner has HIV in the first place. I tend to feel more secure with a HIV antibody test at 6 weeks compared to a P24 Ag/Ab test at 4 weeks. This is because there is more scientific literature on the HIV Ab test as opposed to the Ag test. Your risk is so miniscule I don’t even see a reason for you to be worried. All the best in your medical career.
rgds
Dr Tan
Thank you a lot Dr.Tan! I decided to overcome all of my fears once and for all and I promise to be more objective in the future
Greetings to the Cleanest City in the world 
Hi GirlWithObsessiveCompulsiveDisorder,
LOL! I’m glad we have such a good reputation in Macedonia. You have great strength of will. I’m sure you will become a brilliant doctor.
rgds
Dr Tan
Hi dr.Tan
I did the combo test at 28 days and the result came out as non reactive (<0.9 COI). The exact value was 0.373 though I guess it doesn't matter, right? I'm ashamed for having so little patience and for being so scared. I just had to share this with you doctor. Thanks again
Hi GirlWithObsessiveCompulsiveDisorder,
A Combo test at day 28 is as good as conclusive. You should stop worrying.
rgds
Dr Tan
Hi Dr Tan,
I had unprotected sex on September 14 and 17. I got bad muscle aches and a fever on September 26 and it went away in 3-4 days. I was negative for the flu and I went to Planned Parenthood and did the OraQuick rapid test 34 days after exposure..it was negative. I did the OraQuick finger prick today and it was negative (5 weeks 5 days). I’m 7 months pregnant so I’m VERY concerned and worried.
Hi Scaredtodeath,
First, your symptoms have nothing to do with HIV. Secondly, an Oraquick test at 6 weeks is very nearly 100% accurate. Last, congratulations on your pregnancy. I’m sure both you and the baby are HIV free.
rgds
Dr Tan
The lady at planned parenthood told me that it was too early to find out and to come back in 3 months. Why do some people seroconvert after 6 weeks?
Hi Scaredtodeath,
That is just how unpredictable the human body is. There is no specific reason.
rgds
Dr Tan
Hi doc, i had a the test at 7.5 weeks post exposure.
hiv DNA by PCR= not detected
hiv 1/0/2 abs index value<1.0 non reactive
Rna real time PCR
Hiv RNA not detected
are theese test acurrate or shoul i retest at 12 weeks.
Thanks
Hi rickaguirre,
You have 2 tests there which are 100% accurate at 7.5 weeks post exposure 1. RNA PCR 2. DNA PCR. No more tests necessary.
rgds
Dr Tan
Dear Dr.Tan
I allowed a lady to perform oral sex on me, and removed her mouth before ijaculation. i also inserted my finger for few seconds. I had no wond or cut in my finger. after arround 35 days and 50 days, i did my test for ELISA HIV I/II and both the time found negative. Your reply, “You are being more anxious than you need to be. First of all, oral sex and finger-genital contact has miniscule risk of contracting HIV. Secondly, an ELISA test at 50 days post exposure is 99% accurate. Just repeat the HIV test at 3 months post exposure and stop worrying so much”. Now i will doing my 90 days test HIV I & II antibodies (EIA – ELISA) 1st week of November. Few questions i have.
1. do i require in between one more test for HIV I & II?
2. Is it required to test for STD also? advice based on my exposure.
3. If STD test is requied what are the test I have to do?
please advice
Hi ravi,
Do you mid letting me know which country you are writing from? 1. No you do not require any HIV tests from now till November 2. Yes. You should test for Gonorrhea and Chlamydia.
rgds
Dr Tan
hi, my guy friend trying to have sex with me by putting him penis into my vaginal but i pushing and struggling him hard away.. so in the end nothing happen, but i still feel scare that he may manage to insert in during i am struggling. do u think possible? if may he manage to insert once ( just in n out) will u think i should go HIV test? thanks u
Hi eve,
I’m very sorry to hear what happened to you. Although from your description of events it sounds to me like your risk of HIV is extremely low, it will still be prudent to have a HIV test. You should also be aware of other STDs like Chlamydia and Gonorrhea.
rgds
Dr Tan
thank u dr tan. do u think i should go for hiv test ?
this incident just pass 2 weeks ago.. i very worried and have been crying a lot. what u think of the risk of this event?
Hi eve,
Your risk of HIV is close to zero. I recommend HIV testing merely to be overly cautious. The event must have been very traumatic for you. You should consider confiding in your family and friends. If not, there are counselling hotlines by AWARE Singapore for women who have been victims of sexual assault. You can check them out on: http://www.aware.org.sg/support-services/counselling/
rgds
Dr Tan
Hi eve,
To be safe, yes you should.
rgds
Dr Tan
thank u very much. so can i do oraquick test at 4 weeks?
Hi eve,
Yes you can.
rgds
Dr Tan
Hi doc, I done HIV ag&ab test at 22days at mount alveria hospital . can I have ur further advise ?
Hi Eve,
The combo test at day 22 post exposure is very near 100% accurate. What did your doctor at Mt Alvernia say? You should follow his/her advice.
rgds
Dr Tan
Hi, doctor I don’t dare to say anything about the incident to mount Alvernia hospital so they didn’t give me any advise. From the report then I saw is written
” HIV ag and ab screen – negative “. u say is nearly accurate I really feel like cry as finally I become less worried . So what is ur further recommend ?
Hi Eve,
You just need to repeat an antibody test at 3 months post exposure. I’m glad you are feeling better.
rgds
Dr Tan
Hi doctor may I ask u based on my risk n my combo test result on 22 days how the 12 weeks result be?
Hi Eve,
Your ‘exposure’ was not really an exposure. Furthermore, a combo test at 22 days post exposure is near 100% accurate. It is highly likely that the 12 weeks results will be ok.
rgds
Dr Tan
Thank you so much for answering my question it really help me to get over the incident soon.
Thank you so much for answering my question it really help me to get over the incident soon. As u r right this incident affecting me and I have lot of nightmares due to over worry of the HIV risk.
Hi Eve,
You will be OK. Soon this will be all behind you.
rgds
Dr Tan
Hi doc , this incident pass about 4 weeks 3 days if I do the HIV ag & ab test again will it be final ? As I want to let it all behind soon. Or any test I can get a final answer ?
Hi Eve,
You can either do a HIV Ag/Ab test or a HIV DNA PCR test. Both are conclusive.
rgds
Dr Tan
Hi doc, I just done HIV ag & ab test is NEGATIVE ! How should I thank u for giving me so much advise? I really have to thank u so much. Need to re test again in 12weeks?
Hi Eve,
Congratulations. You do not have HIV. I am very happy for you. You do not need a re-test at 12 weeks. Please enjoy your newfound freedom.
rgds
Dr Tan
Dear Dr.Tan
Thank you for your quick response. I will do the test in Nov and share the report with you.I am from India. I would like to know the test for Gonorrhea and Chlamydia. please let me know.
Once again thank you for your response / reply
Hi ravi,
Greetings to India from Singapore. Gonorrhea and Chlamydia is best tested with PCR via a first catch urine sample or urethral swab.
rgds
Dr Tan
Hi Dr. Tan. I had condom protected sex with a commercial sex worker last night while under influence of alcohol. I know it was stupid, and it will not happen again. It was only condom vaginal sex and nothing else. However, I am worried because I have a small patch of dry skin at the base of my penis and it is sometimes itchy. I have it for a quite sometime already but it does not bother me much. It is not bleeding or painful. Just dry and flaky sometimes. If this area of my skin came into contact with hiv vaginal fluid during intercourse, would it be a risk for me? I appreciate your advise in this matter. Thanks.
Hi Nick,
Regardless of the patch of dry skin, your risk of HIV is still low. However, it is still a risk and you need to get tested for HIV at 1 month and again at 3 months post exposure.
rgds
Dr Tan
Thanks for the quick reply doc. Just would like to clarify, is it low risk because of the dry skin or is it low risk anyway because I had sex with a commercial sex worker, with or without the skin factor?
Hi Nick,
The dry skin does not affect risk assessment.
rgds
Dr Tan
Deeaar doctor Tan,
I haven’t been tested for any otherr STDs but will be going tomorroow but I still feel scared aboout v even though ii teseted negativive with a Hiv DUO &p24 antigen at 4 weekks and 2days and also a hiv rapid test at 2months. I told you that. I found a swollen lymph node behind my ear and my doctor sed it was due 2 my scalp and I’ve now been playing with my nodes on my jaw line and think 1 may be swollen… Dooes this sound likke hiv? I’m soo worried and gettin completely stressed out. Is it possible to get swollen lypmh nodes due too chylmydia or gonnerrehia? Please reply back… Thank you for your time.
Hi frightened 2 death,
Yes. Gonorrhea and Chlamydia infections can cause swollen lymph nodes. There is no need to worry. It will not change the final result. It is what it is. Just get tested and treated if necessary. Why are you still worried about HIV? Are you not convinced that the P24 test is accurate at 4 weeks and 2 days? You must trust the test. If you don’t have HIV then you don’t have HIV. If you start to question the accuracy and validity of the HIV tests then it will be a never ending circle of worry for you.
rgds
Dr Tan
I appreciate all your devotion to us Dr. I forgot to tell you two things. 1-the test report that came back as negative which i took after 45 days of exposure (HIV 1 &2 ABs P24) also has another word in the result “out of range”..what does this mean.
2-I called the hospital and they told me that the test they did uses chemiluminescence tech. What does this mean?
Best regards sir have a nice day
Dear Dr.Tan
Thanks for your advice /reply and greetings. I will do this test too with the 1st urin along with the HIV test. is Gonorrhea and Chlamydia curable? if yes, how long it will take?
what are the symptoms of Gonorrahea / chlamydia?
regards
ravi
Hi ravi,
Yes they are curable. Details of treatment and symptoms are too complex to discuss here. Please refer to the post: http://www.drtanandpartners.com/std-general-info/
rgds
Dr Tan
Dr. Tan
thanks for your reply. I have gone through the details it was extreemly good. Eventhough the symtomps are visible, i would like to do the testing for STD.
thanks for your reply
Hi ravi,
You are welcome.
rgds
Dr Tan
Thanks Dr Tan for helping peoples who are paranoid with HIV.
I’m here to describe my exposure.
This was my first time having extramarital sexual event, I had a erotic massage at Thailand.The masseur performed protected oral sex and I ejaculated in the condom. Yet, I had fingered her without inserting my finger. I was just rubbing outside the vagina about 15 seconds.The vagina fluids is contacted with my finger. When I back to hotel, I found my finger had hangnail which was swelling and reddish.
I had started fear of contacting HIV virus. I posted my exposure in medhelp forum, 2 of the STD doctor Dr Garcie and Dr Hunter were answer my question and they told me my exposure was risk-free. There is no documented case shown than HIV is spread by hand to genital contact or fingering because the composition of finger is much different with genital.
To have peace of my mind I get tested at Singapore with oraquick HIV1/HIV2 at close to 8 weeks after exposure. It came back negative.
I have a doubt to my test result because I had taken some food 8 minutes before the oral swab. The swabbed fluid is contain some food sauge and my mount was dry. Does food and dry mount affected the test result? and should I go back for conclusive test?
Thanks in advance
Hi Shawn,
You are certainly being much more worried than you need to be. First of all you cannot catch HIV from your kind of exposure. Second of all, you have to trust the medical personel who did the test for you. I’m sure if there was any reason to doubt the validity of the test at all he or she would have flagged that out. Lastly, the Oraquick has a control line built in to ensure a self-check on the validity of the result. You really should forget about HIV and move on.
rgds
Dr Tan
Thanks Doctor, you are very knowledgeable in STD.
I should trust the doctor who did the test for me but somehow I always being anxiety to think more in negative and worried about exceptional case. I caught the cold at weeks 11 that was the reason I came back to be paranoid. I know the cold symptoms are not the typical symptoms for ARS and delayed seroconversion at 11 weeks is extremely rare. Only peoples who are poor in immune system will undergo late seroconversion.
I should trust the scientist. Thanks Dr Tan for answering my question. Your reply is much appreciate and helpful to me.
Hi Shawn,
You are welcome.
rgds
Dr Tan
Hi Dr Tan,
Im from Malaysia.I just want a second opinion.I and my sex partner with unknown health status had sex with condom on 30 July 2011.We also doing oral sex. Later that its makes me wonder either she is clear or not because of the oral sex we had made.I took on HIV test at clinic on day 62,75,87 using Retrocheck HIV WB from India and all the results are negative.what do u think about my situaion ,doctor?am i clear?do i need to do another hiv test?
Hi very worried person.
Oral sex has almost no risk of transferring HIV. I am unfamiliar with the Retrocheck WB and cannot comment on its accuracy. I suggest you see a doctor and have a proper HIV test done to clear your mind.
rgds
Dr Tan
for your information doctor, i have check about the Retrocheck HIV – WB is a third generation, rapid, self performing, qualitative, two site, sandwich immunoassay for the simultaneous detection of antibodies specific to the HIV 1 and HIV 2 virus in serum, plasma or whole blood.
doctor , is it a ELISA method test?
Hi very worried person,
Yes it sounds like an ELISA test. However, what is more important is the performance characteristics. Every HIV test will come with details of its performance characteristics i.e. how it compare with standard ELISA tests in terms of accuracy, window period, detecting HIV in people with other disease etc.
rgds
Dr Tan
hi doctor
for the additional information this retrocheck HIV is the 3rd generation ELISA test that can detect the presence the HIV 1/2 antibodies after 4 weeks exposure and its 100% senstivity.1 take 3 times test and all of them are negative
what is your opinion doctor?
Hi very worried person,
I have yet to come across an ELISA test that claims 100% sensitivity at 4 weeks. It makes me a little sceptical. Of course statistically it is extremely unlikely you have HIV but to be 100% sure, I would still advise you to repeat a ELISA HIV test at 3 months post exposure.
rgds
Dr Tan
Hi Dr. Tan,
I had sex with sex worker almost 5 years back i used condom that time.
But after my sex i saw some sticky liquid on my condom , i dont know it was her vaginal liquid or ma condom got broke.
But after 5 years when i Test myself with 1) Hiv Trio-dot 2) Hiv Elisa antibody 3) Hiv Elisa Antidody / antigen. all came back NON REACTIVE
Also my
White blood count is 5.00 mm3
Lymphocyte count is 1.92 mm3
But my main concern is
1) can hiv antibodies stay such longer period in body?
2) 5 years period ok for hiv antibody test?
3) do i need CD4cout test?
4) According to my CBC Report can i consider my immune system is fine and my body have capacity to produce antibody?
5) Can we can predict CD4 count on basic of lymphocytes count? ( I HEARD SOMEWHERE THAT CD4 COUNT IS ALMOST HALF OF YOUR LYMPHOCYTES COUNT)
PLEASE AND MY ALL ABOVE QUESTIONS DR. TAN.
I AM VERY SCARED.
THANKS AND REGARDS
Hi Vikas,
Your exposure was 5 years ago. There is no doubt that your HIV antibody test now is 100% accurate and completely conclusive. There is no need to consider the Lymphocyte count or CD4 count. You do not have HIV. There is no need to think of anything else.
rgds
Dr Tan
Dr, tan ,
I have checked all your forum but did not got ans ?
Only one person asked test after5 years?
But you can see my douts , please help me sir?
Thanks and regards
Dear Dr, when I checked my 4weeks Elisa test for HIV…the result came as negative as u know already…during that time the lymphocyte count was elevated from the normal range, that is 52%..the normal range in that report was mentioned between(20-45%). When I took my Anti HIV1/2 rapid test at 9weeks, I have not focus to check the lymphocyte count…is there any relation between increased lymphocyte count and HIV? I just remember it now because some one mentioned the lymphocyte count in their question….Dr please clear my doubt..thanks in advance..am so sorry to disturb you again…
Hi Dev,
The lymphocyte count has nothing to do with HIV. A negative HIV test at 9 weeks post exposure is as good as conclusive.
rgds
Dr Tan
Dear Dr Tan,
I am very thankfull for your prompt reply.
But could please explain me we can predict CD4 count on basic of lymphocytes count? ( I HEARD SOMEWHERE THAT CD4 COUNT IS ALMOST HALF OF YOUR LYMPHOCYTES COUNT)
And
According to my CBC Report can i consider my immune system is fine and my body have capacity to produce antibody?
I know that u are quite busy with ur work but please ans me these questions Dr.
I hope u understand me.
Thanks and regards
Hi Vikas,
There is no way to accurately calculate the CD4 cell count from the lymphocyte count. The CBC report cannot be used to determine is your body is capable of producing antibodies or not. In reality, if your body was not capable of producing antibodies, you really would have been very very ill a long time ago from multiple other diseases. The question to ask is : why are you so concerned about your immune system?
rgds
Dr Tan
Dr. Tan,
Coz i know that my all three results are no- reactive .
Now i am thinking that my if my body dont have antibodies coz i already pass 5 years.
I was little ill twice in last 6-7 months but gone in 3-4 days .
Sometime i see white coating on back of my tongue disappear when i use Mouth wash..
But when i took my 3 results in five -six month i was totally fine now also very healthy but scared coz got ill twice may be due to climate change
As you said There is no way to accurately calculate the CD4 cell count from the lymphocyte count .
But can we at least predict that i have minimum CCD4 count to produce antibody from my lymphocytes count which is 1900 .
please ans sir.
Thanks and regards
Hi Vikas,
If you are that worried about your CD4 cell count why don’t you just go for a CD4 cell count test. I really can see no reason for your worry. You are actually worried that your body is unable to produce antibodies and therefore your tests are not accurate? That thought is so absurb I do not even know how to start to answer it. If you do not have the ability to produce antibodies you really would either be in hospital or worse by now.
rgds
Dr Tan
Dr. Tan,
Very thanks for reply.
when some one cant produce antibody it means it very very last stage of aids.
And that person cant even walk and cant do normal routine life work. Right
My weight was 84kg few moths back and now its 87 i have put on 3 kg
i do all my routine work , and that why i guess all pathology in charge told me my result is 100% accurate im am very healthy .
Right sir .
Thanks and regards
Hi vikas,
Yes that’s right. You are well and healthy. Do not worry anymore.
rgds
Dr Tan
dear dr tan ,i had unprotected sex with sex worker 5 time with same person is almost 5 month ,i test 4 time the result (no reactive) the menthod is call eclia is that me 100% hiv free? or i nid to retest? pls reply me dr thank !
Hi zj,
Was any of your tests at least 3 months after the final exposure? If it was then you are 100% HIV free.
rgds
Dr Tan
hi dr hiv test 3 month is that sure can move on?
Hi mim,
Yes. 3 months is good enough. The test is conclusive. Please move on.
rgds
Dr Tan
I had a test done on my 12th week and 82nd day and it was negative, but was on recently one antibiotics (stopped the use of clyndamycin) 2 days prior to the test. would this effect the test result?
the clyndamycin was inaccurately prescribed for “strep throat” which turned out to only be an aptos ulcer. Now I have thrush, could this be from the antibiotic?
Hi WWT,
No. Taking antibiotics will not affect the HIV test results. A negative test at 12 weeks post exposure is conclusive. Yes. Taking antibiotics can defnitely cause thrush.
rgds
Dr Tan
Dear Doctor,
From what I remember, a while ago, there was only PCR test for HIV 1 available in Singapore. You mention in one of you comments here that there is a PCR for HIV 2. Is it the same test and tests also include for HIV 1, O and 2, or are there a few different tests? If there are a few different tests, or just one test, how can I find out the cost of taking them?
Thank you!!
Hi stressguy,
As far as I am aware, only RNA and DNA PCR tests are available only for HIV 1 in Singapore. To screen for HIV 1 and 2, we usually use the rapid tests or ELISA tests. HIV 2 is almost unheard of in Singapore.
rgds
Dr Tan
Dr. Tan
What are the chances of my negative 6 week Oraquick test changing to positive at 8 weeks and 12 weeks?
Hi Worriedd,
As good as zero.
rgds
Dr Tan
Hello Dr. Tan,
How does a swollen lymph node looks like? I have a bump on my pelvic area, above the penis. I’m not sure if it is one or not.
Hi Luke,
Its very difficult to explain. Doctors spend a long time studying the anatomy of lymph node chains and practicing and learning feeling for lymph nodes and how to tell normal apart from swollen or fixed or immobile etc etc. I really cannot summarise all this learning into one short paragraph. If you are worried about swollen lymph nodes you really should see your doctor.
rgds
Dr Tan
Dear Dr.Tan,
I am a regular visitor of your forum and found you are very helpful to users irrespective of your busy schedule in the clinic. It is a great kind of online service you could provide and we all really have no words to be thankedwith for your kind service.
I would like to post my concerns and as usual, i am expecting your response.
I am from India, working abroad. On about first week of March 2011, i had my last sex with a prostitute in Dubai which was protected only.But she gave me unprotected oral sex for about less than 1 minute.
I did my complete medical check up for another abroad assignments on 12th May from India (after 2 months possible exposure)which includes urine,blood (malaria,micro filaria,FBS,LFTS,Creatinine,ELISA(HIV-1/2,HBs Ag,Anti HCV),VDRL),BMI,Other tests includes Systemic Exam, Respiratory system,Gastro Intestinal,Venereal Diseases,CNS,Hernia,Helminthes,Giardia,Salmonella etc etc..
All medical results were fit, but clinic told me to do confirmatory test for VDRL, which is TPHA as they doubtfully seems reactive in negligible count. Then i consulted our doctor & he said it might be wrong report from lab and did VDRL test in a super specialty hospital where he is working. VDRL shows non-reactive there. Then i tested again in the clinic where my earlier medical tests done and they confirmed that it is non-reactive (either may be with TPHA or repeated VDRL).
Then after 1 month, I joined for my new job in abroad and as a procedure for work permit i did all medical checkup again (which is after 100th day of possible exposure)which includes ELISA & VDRL as mentioned above.result was fit.
After 2 months (5+ months possible exposure) found 2 pimple type points over public hair area.Then i consulted doctor and she gave me some medicine then it gone disappeared soon & she explained it is a minor infection.
I am not worried about HIV actually, because i have gone through many forum includes yours and found that 3 month ELISA test is conclusive enough.My case i have tested at 2 month , 100th Day both were fit and i never lost weight but instead increased 3KG
and i believe strongly that for work permit related medical test, test equipment will be of modern type with advanced technologies and ministry have strong guidelines to avoid fault results.
But from the explanation above, i would be much thankful to you if you could give ur opinion, since i am bit worried about the reason that pimples which were occurred and suddenly treated with medicine and past VDRL result (though it seems a fault result or confirmed non reactive with TPHA).
Hi Prabath,
Thank you for your kind words and extremely detailed history. I completely agree with you that you do not have HIV. It was unfortunate that you had a false positive VDRL which I think is the course of all your concerns. There are many causes of a false positive VDRL that is why we always conduct the TPHA as a confirmatory test. I am equally certain you do not have Syphilis. The most common cause of ‘pimples’ in the pubic area is folliculitits (infection of the hair follicles). This can happen to anyone especially if you are working in a warm or dusty area. It has nothing to do with HIV, Syphilis or any other STDs. It is a red herring and really is no cause for concern. It has nothing to do with you false positive VDRL. In summary: 1. You do not have HIV. 2. You do not have Syphilis. 3. You had a minor case of folliculitis which responded well to the treatment given by your doctor. 4. You have no reason to worry.
rgds
Dr Tan
Dear Doctor,
I am sorry to take one more chance.
May i know from the above test description i did for abroad job, does it covers most of STDs? i am not familiar with medical terms. Just typed d names of test frm d medical report which i have.
Any other STDs do i need to test for, which is having beyond 3 month window period? d above said tests were done at 100th day..do u suggest me to do test for any STDs which have /have not covered above and having window period more than 3 month.
Hi Prabath,
For comprehensive STD testing you need the following: 1. Physical examination for warts, molluscum, scabies and lice 2. Blood taken for HIV, Syphilis, Herpes 1, Herpes 2, Hepatitis A, B and C tests 3. Urine or urethral swabs for Chlamydia, Gonorrhea, NSU, Mycoplasma, Ureaplasma, GBS and Yeasts tests. 3 months is more than good enough for all the tests.
rgds
Dr Tan
Let me conclude here that i should not be worried as I am. I have passed medical fitness for abroad job which is after 3 months of possible exposure. That too did 2 times as explained above. (after 2 month and 100th day). from India & in Middle east. Both the countries are highly advanced in medical field. both the test covered at least malaria,micro filaria,FBS,LFTS,Creatinine,ELISA(HIV-1/2,HBs Ag,Anti HCV),VDRL).As u said above, in the comprehensive test description i could only get informed that I did HIV 1/2, Syphilis test, other things i dont know whether covered in above test items or not due to lack of knowledge in medical field. I presume that most of the STDs checks they might have covered as ministry of India & foreign ministry have strong regulations in this regard, specially employment purpose.
doctor, does pregnancy count as a suppressed immune system disorder and will I be able to test accurately like everyone else? thanks
Hi Ashley,
That is an absolutely brilliant question. It is the first time in my career I have ever been asked that. Very intelligent indeed. As you probably already know, antenatal HIV testing has become common place all over the world. Even here in Singapore it is an opt-out test for pregnant women. There is actually a lot of information on it. The fact is with regards to pregnant women, doctors are more afraid of false positive results rather than false negatives. There is about a 0.5% chance a pregnant woman will be false positive on the screening test. The confirmatory Western Blot would then show a negative result for HIV. For a few really unlucky women, the Westen Blot might even be indeterminate. However, the for women who test negative on the screening tests, we will accept the result as accurate provided the window period has been reached. So in summary, yes, you will test accurately like everyone else subject to the same window period.
rgds
Dr Tan
I tested negative on the rapid oraquick test 7 weeks after an exposure.
Hi Ashley,
That is good enough. You are HIV negative.
rgds
Dr Tan
Hi Doctor Tan,
thank you for your time, about Rapid hiv blood test i notice you mention that testing 6 weeks after exposure if its negative, usually thats conclusive am i right to assume that? or how long is a better gauge scientifically speaking?
Hi rapid test,
Yes. 6 weeks has been found to good enough, scientifically speaking. But according to some country’s HIV testing policies, 3 months is still recommended. The more progressive countries like some states in the US, has already changed their policy to reflect a 6 weeks window period.
rgds
Dr Tan
Hi Doctor,
so the 6 weeks conclusive result is base on a Rapid Blood Antibody test or a Rapid Blood Antigen & Antibody Duo test?
Hi rapid test,
Antibody test. The P24 is inaccurate after 6 weeks.
rgds
Dr Tan
Dr Tan.
I had a risky exposure prior to August 3rd 2011. I got blood tested through an online lab service where I was required to visit a Lab Corp location, this was on October 19th 2011. Are these tests ordered via online accurate, and is the time frame ok, it ends up being exactly 11 weeks.
Thank You,
DP
Hi DP,
What did the online lab people say? It really depends on what kind of test they conducted so I am unable to comment on its accuracy. The window period also depends on what test they did but the rule of thumb is 12 weeks.
rgds
Dr Tan
Dr. Tan,
What is more likely.. a false negative or a false positive. Will a flu shot have an impact on the results.. If so how long should I wait.
Thank You,
DP
Hi DP,
For screening tests there is a higher rate of false positive than false negatives. No, a flu shot will not have any impact on the results.
rgds
Dr Tan
Hi Dr Tan
I had an weak positive Dengue IgM test while I was experiencing acute dengue type symptoms 3 weeks ago. I have read where the acute phase of dengue can resemble ARS or acute HIV. I recovered from Dengue after 7 days as my platelet count was going back to normal levels at this time. I had a low probability exposure to HIV 11 weeks ago. Can ARS appear that long (8 weeks) after a possible infection? If this was ARS and not Dengue, what is the recommended test to take three weeks post ARS? Does Dengue affect HIV tests?
Thanks
Hi Concerned,
Many things can resemble ARS even run-of-the-mill cough and colds. 90% of people who suffer ARS symptoms experience it at 3 to 4 weeks post exposure. 8 weeks is a little too long to have ARS symptoms. If you are still worried about HIV I would suggest you take rapid antibody test.
rgds
Dr Tan
Hi Dr,
I fingered a girl on 23th Sept 2010, i have my finger covered with condom but after some time, i feel her “liquid” on my hand, and there a some heat rush on my hand which got into contact with her “liquid”. i washed my hand with running water and soap right after that. the whole thing lasted 10 mins.
I tested using oraquick on the 25th day, and 38th day, result is neg, is this okay? conclusive? Do i need to retest again?
Thank you,
Worried
Hi Worried,
First of all your exposure wasn’t really an exposure at all. Secondly, an Oraquick test at day 38 is very near 100% accurate. But if you are that worried about HIV you should retest at 3 months post exposure.
rgds
Dr Tan
Hi Dr,
I retested on 7 week and result is neg. Do you think this will be concludsive?
So far, test i have done 4 test:
1. Full package blood test that include free HIV testing on the 3 weeks + 4 days. ( the document written able to detect HIV in 4 weeks)
2. 4 week
3. 5 weeks + 3 days
4. 7 weeks(49 days).
The last 3 test is done using OraQuick. The Doctor did told me that i am fine but i am still worried. Do i have to go for another test? i hope to go for another on this week ( 8th week)
Recently i feel cold, having pain in my join and some discomfort in my hand and leg. And i visited my family doctor, but he did not detect anything wrong as well.
And i dare not have sex with my wife. Can i do it?
Thank you for reading.
Hi Worried,
An Oraquick test at 7 weeks is really as good as conclusive. I know the official recommendation by the Ministry of Health is to repeat the test at 3 months. But if you look at the performance characteristics of the test, you will find that 6 weeks is actually enough. I really do not think your symptoms have anything to do with HIV. I will tell you that you do not have HIV, do not worry and please go ahead with relationships with your wife. Officially however, I need to tell you to retest at 3 months.
rgds
Dr Tan
Hi Dr Tan,
Thank you for your reply. I got tested today, which is 8 weeks. Result is neg. I have been feeling pain on my hand and sore throat now. would it be related? I hope this will be final and hope I can go back to my normal life again.
I will still go for another test on 12 weeks to confirm. would you foresee the result be the neg as well? and would i need to go for 6 months again?
Thank you.
Hi Worried,
A test at 8 weeks, in my mind, is as good as conclusive. I’m sure your 12 weeks test will also turn out well. You certainly do not require a re-test at 6 months. I’m sure your symptoms have nothing to do with HIV. If your symptoms persist, you really should see a doctor to have it sorted out.
rgds
Dr Tan
Hi Dr,
Thanks for your reply.
i have done total 4 test after this incident.
first is done at 3 week+ 5 days which is a blood test which include free HIV test.
Next, i done a few oraquick ( mouth swab)test.
I done it on 4th week, 6th week and 7th week.
all test result is neg.
May i know is it conclusive? do i still need to retest again?
Recently, I have been feeling cold, weak feet. Is it due to me being too worried?
I also dare not have unprotected sex with my wife as i am worried.or can i….
is oraquick ( mouth swab) test good and can this be conclusive?
Thanks again Dr Tan
Hi Worried,
Is this a repeat post? Apologies, I am in Taiwan attending the Asia Pacific Congress on Sexual Medicine so my replies may be slower than usual. I have answered your previous post, please refer to that.
rgds
Dr Tan
Hi Dr Tan,
Thanks for your above reply. i am replying here as not able to click on the reply link above.
Feeling better after you explained for my 8 week test.
Have consulted family Dr for my flu symptoms for some times and hope it will be over soon.
Thank you
Hi Worried,
You are welcome.
rgds
Dr Tan
dr if i 3 month test negative can i have unprotec sex with my wife?
Hi mim,
Yes you can.
rgds
Dr Tan
Can taken the medicine Valacyclovir (Valtrex) for Herpes II infection have effects / interfere with a HIV RNA PCR VL test?
Hi Ocean,
No, Valtrex will not affect the HIV RNA PCR test.
rgds
Dr Tan
Dr. Tan
I read on a web site that the HIV RNA PCR Real Time VL test can have a undetectable VL <20 copies/mL even if a person is HIV+ due to during seroconversion or just after seroconversion. Is this infomation accurate? As I was under the impression the first few months the majority of people have high dectectable HIV Viral Loads. I tested with the below test through Labcorp,
COBAS® AmpliPrep/COBAS® TaqMan® HIV-1 Test, version 2.0 (v2.0) is an in vitro nucleic acid amplification test for the quantitation of Human Immunodeficiency Virus Type 1 (HIV-1) RNA in human plasma using the COBAS® AmpliPrep Instrument for automated specimen processing and the COBAS® TaqMan® Analyzer or COBAS® TaqMan® 48 Analyzer for automated amplification and detection. The test can quantitate HIV-1 RNA over the range of 20 – 10,000,000 copies/mL. One copy of HIV-1 RNA is equivalent to 1.7 ± 0.1 International Units (IU) based on the WHO 1st International Standard for HIV-1 RNA for Nucleic Acid-Based Techniques (NAT) (NIBSC 97/656).
Hi Ocean,
Are you saying that at seroconversion the viral load drops to undetectable levels? I have never heard of this. Can you forward the URL on which you read this to me? Thanks!
rgds
Dr Tan
Dr. Tan
See below URL. I will also email you the URL and my test results.
It seems that with the modern tests a VL should be detected in a recent infected person post 14 days if the person is not on any anti-HIV medication treatment.
http://www.aafp.org/afp/990800ap/535.html
http://www.infoabouthealth.com/hiv/rna/hiv_rna_pcr.html
http://www.thebody.com/Forums/AIDS/Labs/Q214465.html?ic=2003
http://www.medhelp.org/posts/HIV-Prevention/HIV-1-DNA-RT–PCR-With-HIV-Antibodies-test/show/1348330
http://californiahiv.com/default.html
Dr.Tan
on 50 days of exposure, my negative test result in HIV I/II antibodies (EIA – ELISA) is 99% accurate as per one of your comment. which are people falls under balance 1% left out. I am going to do my 90 days test in next few days. I am worried.
Hi ravi,
Very unlucky people. There is really no need to worry. The statistics are in your favor.
rgds
Dr Tan
hi Dr,
Duo test is done usually with taking a Blood sample right Dr.? & result will take four hours to be determined right?
as i told you before i had negative Antibody/p24 Antigen at 38 days post exposure. can i move on with my life?
thank you
Hi Gemini,
Yes, either with drawn blood or a finger prick. The turnaround time depends on the test. There are rapid P24 tests that can give results in 20 minutes. A Combo test at 38 days post exposure is good enough. You can stop worrying and move on.
rgds
Dr Tan
Hello Doctor,
84 days ago i went to a massage parlor and got a hand job after the massage. I did not kiss nor penetrate the lady.
The night after i felt a sore throat. Then a i had the flu for 5 days.
After that about 4 weeks on i has itchy skin with no visible rash.
At my eleventh week i got mouth sores and a herpes outbreak on the lip (Always had those).
I did combo tests at 14, 24 and 41 days all negative.
Today i did it again at my 84th day.
Should i be worried?
Thank you!!!!!
Hi Mastodon,
First of all your exposure wasn’t really an exposure at all. Secondly, you have multiple tests that conclude you do not have HIV. You need to stop worrying and forget about this.
rgds
Dr Tan
Thank you sir for your help. So if today my results are negative i can forget this episode completely?
Hi Mastodon,
Yes you can.
rgds
Dr Tan
Hi Dr Tam
I wanted to ask if it’s possible to experience ARS symptoms 8 weeks post exposure to HIV. Also if this is the case what is the appropriate test to take at the three month marker. That is, 4 weeks after ARS was seen.
Thanks for your response in advance
Hi Information please,
It is possible but extremely unlikely. I have seen ARS symptoms persist till 8 weeks but the onset is usually much earlier at about 4 weeks. The presence of ARS symptoms do not change the type of test required. At 3 months the best test to do is still the HIV antibody test.
rgds
Dr Tan
Hi Dr Tan,
Had a 10 week post exposure Oraquick test — negative
Would you say this is completely definitive?
thanks
Hi gautam,
You need to repeat it at 3 months post exposure to be 100% sure.
rgds
Dr Tan
Hello doc i am also pregnant and am wondering if it takes pregnant women longer to seroconvert or does the six week window period apply to them also if taking a rapid test
Hi Concerned,
The 6 weeks window period still applies. If anything, pregnancy increases the chance of a false positive test rather than a false negative test.
rgds
Dr Tan
hello dr,
my questions are as follows
1.is it possible for two different HIV antibody test kit to show two different results from the same sample: say an oraquick test kit showing negative and first response test kit showing positive?and i must add that the first response test kit has a high percentage of sensitivity than the oraquick whereas the oraquick has a high specificity than the first response.and if such tie occurs which of the two test should you should you pick assuming they are all licensed in your country.
2. i had an unprotected sex with a female who happens to be HIV+, 61 days post exposure and my antibody rapid test is negative, again i must say that i have never experience any form of illness.what is my chance of coming clean after 12 weeks testing?
thank you.
Hi halloween,
1. Yes it is. Different test kits use different antigens to bind HIV antibodies. I would pick neither. Any positive rapid test has to be confirmed by a Western Blot. 2. Near 100%. Statistically, rapid test kits are actually 100% sensitive at 6 weeks post exposure.
rgds
Dr Tan
Hi Dr.Tan,
A week back, i spent some time with a CSW. We tried to have penetrative sex and I tried to penetrate and since she is drunk, I didn’t want to continue and left that. But i did finger her, kissed her etc. All acts were done with my condom on. I removed my condom without washing my hands and washed my penis. Is there any chance for me to get STD or HIV??
Hi duminy,
We have to consider HIV and STDs seperately. Your risk of catching HIV is miniscule. You risk of catching STDs like Syphilis, Herpes, Chlamydia Gonorrhea is significant depending on what ‘etc’ is.
rgds
Dr Tan
Hi Dr.Tan,
I didn’t have any penetrative sex but I did involved in the act of kissing, cuddling, fingering and rubbing my penis against vagina with condom on.
Do I need to undergo any testing?
Hi duminy,
Yes. You need to test for Herpes, Syphilis, Gonorrhea, Chlamydia and NSU.
rgds
Dr Tan
Hi Dr.Tan,
I just kissed her in the lips and involved in no oral sex..so can STDs be caused without oral sex?
Hi duminy,
STD is a term and ecompasses about 15 unique diseases. It is very difficult to make blanket statements that cover all of them. You should see your doctor for a proper consultation onyour precise risks and what tests you need to do.
rgds
Dr Tan
hi Dr. Tan,
I’m thinking to visit your clinic, im on my week 3 after risk exposure with unprotected oral and protected vaginal. I already check for anti HIV on week 2 and 3 which came out negative. and several STD check.
when do you think is the best time to come? coz i live in other country.
is viral load is the same with PCR RNA HIV test that you mentioned for week 3 test? let me know, thanks
hi sorry, since i live in other country. before visiting singapore, how many days is the result for pcr test and p24 ? thx
Hi john,
The turnaround for the PCR test can be up to 2 weeks. The P24 test we can do rapid with a 20 minute turnaround time.
rgds
Dr Tan
Dear Dr Tan
Does it make a difference spot test for hiv p24 and the blood sample sent by overnight or the next day courier. Assume exceed 144 hours (6 days). sorry again ask you this question, promise you this is the last question. i am waiting your answer .
THANK YOU..
My country did not spot test for hiv p24,elisa,etc.Usually blood sample sent by courier the next day,after 1 week can received the result..i am afraid the blood sample store too long may effect the result.
Hi miao,
The result will be affected if the sample is stored in improper storage conditions for 1 year. You really cannot be looking for reasons to discredit the tests you did. This will lead you down a very slippery slope.
rgds
Dr Tan
Hi miao,
6 days is not long enough for P24 to degrade to a level to affect the accuracy of testing.
rgds
Dr Tan
Hi john,
The best time to visit for a comprehensive STD screen is 1 month post exposure. However, you will still need to repeat a HIV and Syphilis test at 3 months post exposure. Yes, HIV RNA PCR measures the viral load.
rgds
Dr Tan
Dear Dr Tan.
Thanks for the quick response. I’m still a little bit confuse with my risk exposure date. I had a protected vaginal and unprotected oral on october 10th. And protected oral and vaginal on october 14th. Should i start counting it from 10th or 14th? Thx.
Do i need to make an appointment?
Dear dr Tan.
And is it right if i can do the test today. Let say my last risk exposure date is october 14th. So im taking pcr RNA test? Thx
Hi John,
Yes that’s right. For the PCR test please come in the moening before 1130am.
rgds
Dr Tan
Hi John,
You should start counting from the date of latest exposure i.e. 14th October.
rgds
Dr Tan
Hi Dr Tan,
Because i can’t wait too long. On 18 days after exposure i had another test in my country.
HIV (antigen+antibody)EIA
CD4
HIV RNA
And the result
ELFA (antigenP24) non reactive
ELFA (antibody) non reactive
Rapid 1&2 non reactive
And CD4 absolute is 548.
Do you its normal with the cd4 count? Thx
Hi John,
You should ask your doctor to interpret the CD4 cell count for you. Your lab might have different reference values. I do not see the HIV RNA result.
rgds
Dr Tan
Dear dr Tan ,
And the test was taken at 7pm. Does it make any differences? Thx
Hi John,
It makes a difference in Singapore. I am not sure about your country. If taking the blood at 7pm would affect the results, your doctor should have and would have pointed this out to you.
rgds
Dr Tan
Hi Dr Tan,
I’m still waiting for the PCR result. it takes about 2 weeks. I’ll post the result as soon as I get it.
what makes the difference to take CD4 at night?
and is oraquick test u mentioned on other subject is available overseas and pharmacy? or have to be in the clinic? thx a lot
regards
Hi john,
Most clinics do not have the proper facilities to store blood samples overnight. This might lead to degeneration of the sample and thus affect the results. In Singapore, all rapid HIV tests including the Oraquick has to be conducted in clinics. I am not sure of the situation elsewhere in the world.
rgds
Dr Tan
Hi dr Tan,
Im thinking to do the comprehensive STD screen test at your clinic, how long does it take to get the result? Because i dont live in town.
Do you think the best time to do the screen test is on 4 weeks post exposure or wait until 6 weeks post exposure?
What if i already did gonorhea and chlamydia swab test on 2-3 weeks post exposure, do i still need to do the same test?
Thx
Hi John,
It takes about 1 week to get results. I usually screen for STDs at 4 weeks post exposure with the caveat that HIV and Syphilis tests are repeated at 3 months post exposure. You do not need to repeat the Chlamydia and Gonorrhea tests.
rgds
Dr Tan
Hi Dr Tan
The test i took in my country is HIV antibody +antigen EIA and the test result is ELFA
Is it the 3rd or 4th generation? And is it the same with P24 test? Thx
Hi John,
It is the same as a P24 Antigen combined with HIV antibody test.
rgds
Dr Tan
Hi Dr Tan,
I have a flu symptom, fever and sore throat today. Do you think CMIA combo ag/ab is good for week 4 test ( day 26 or 27. Thx
Is flu and fever medicine i took will effext hiv test? Thx
Hi John,
You cannot be jumping at every symptom. The combo test at 4 weeks is very accurate. No, flu and fever medicine will not affect the test.
rgds
Dr Tan
Hi Dr Tan,
Now i m really afraid. Never been flu and fever more than 2 days for couple of years. But suddenly i have fever , flu and sore throat
But i have long time uncomfortable with my throat ( dry/ small cough)
Should i also test for VDRL+RPHL?
Thx. Regards
Hi John,
You should see a doctor and have your symptoms properly diagnosed. The doctor will recommend the appropriate tests for you.
rgds
Dr Tan
Hi Dr Tan,
Thanks a lot for the reply. Im planning to visit your clinic nextweek or in 2 week after PCR RN result. Do i need to make an appointment? Thx
Hi John,
No you do not. We are a walk in clinic.
rgds
Dr Tan
Hi Dr tan.
Sorry for the last silly question. Do you think 26 days post exposure or 35 days post exposure its ok to do the 28 days duo test? Or the 28 days test with cmia duo must at exact 28 days. Thx
Hi John,
The P24 starts to rise at 3 weeks peaks at about 4 weeks and declines rapidly. It is a smooth curve and there is not one ‘perfect time’ to do the test. Its all about statistics and probablities. Furthermore, we cannot predct the precise reaction in every individual human. So the answer is: No, it does not have to be exactly at 28 days.
rgds
Dr Tan
Hi Dr Tan
I tested week 2 with ELISA non reactive
Week 3 P24 non reactive
Week 4 CMIA combo non reactive
Swab tested for chlamidya, GO, gram on week 3 also negative
Week 1-2 tested for herpes I Ig M, anti herpes I Ig G, anti herpes II IgG, anti herpes II IgM, anti chlamidia IgG, anti chlamidia IgM
Still waiting for PCR result that tested on week 2-3
But now i really have bad sore throat and a little bit fever.
What do you think? Should i just wait to week 6 and do the rapid hiv and std screen?
Thx
Regards
Hi John,
I think you already have had too many tests. Why are you so convinced your sore throat and fever are due to STDs? Go see a doctor and get yourself diagnosed. Maybe all you have is a throat infection.
rgds
Dr Tan
Hi Dr Tan,
Yeah i’ve been to doctor and he gave me antibiotic which is i still have the sore throat.
I think i’m really paranoid about the hiv and std. Wanted to make sure and move on.
Thx for the help doc. Its really been helpfull
Regards
thank you very much Dr.Tan
35 Days Ago,i had unprotected 10 seconds vaginal intercourse for 2 times (same day ) with the same sex worker,then i put the condom,3 days after exposure i begin having like nettle rash that appear and disappear in dif parts of the body(minor) , and now i’m having like headache and lose of energy,i’m so worried,please help me,is it possible to be contracted ? ?
can i make the HIV blood test in the Lab now ?
Hi raven,
There is really no point getting worried over your symptoms. Just go and have a HIV test. The test is rather accurate and 35 days post exposure.
rgds
Dr Tan
hi Dr.Tan,
I had intercourse 1year4months before.After 10 months of my post exposure i tested STD test & i got HCV that also less than 15 range.. doctor told me it will cure automatically because its in negative range. now i checked for hcv its came negative. last month i did hiv1&2 test its negative only. now 15 days before i did western blot test its also negative.what is the window period for hiv? some of them telling that window period will be 3 to 5 years.now iam safe or not… i was worried a lot… please help me…..
Hi Ramesh,
The window period for HIV testing is 3 months. You certainly do not have HIV. Please stop worrying.
rgds
Dr Tan
thanks a lot DrTan….. one dought… in my western blot test it shown that hiv1 under 9 subtypes like hiv1p24,hiv1p51,hiv1p55…etc my result for that is not detectable and hiv2 also not detectable…
under that in comments -they given westerblot for both hiv1&2 are negative… another one after commands in the heading as Interpretation-they given that Hiv1&2 negative is reported when only controlbandsor controlband with P55/P51 is detected…. interpretation means what ? my test result was ok or not…..
Hi ramesh,
It means you do not have HIV.
rgds
Dr Tan
hi Drtan,
now i feel good thanks a lot….
Hi DrTan,
i was little worried because one doctor told me that we cant able to sure the incubation period it may be 3 to 5 years so u have to check until that period…. but my family Dr said window period is 3 months only..so no need for further test.dont believe 3 to 5years period… now 1year and 4months completed .iam hiv negative only.. iam 100% free from hiv or not? going to get married with in 3 months so only iam afraid….. can i put end for this and move on?..please help me……
Hi ramesh,
I have no idea why this doctor told you the incubation period is 3 to 5 years. He probably means the incubation period before HIV becomes AIDS. I cannot believe he is referring to the testing window period. You can ask as many doctors as you wish and read up as many scientific documents that you can lay your hands on. You will find that your family doctor and I are right on the 3 months window period. If you find that you cannot stop worrying about this I strongly suggest you seek professional psychiatric help.
rgds
Dr Tan
thanks drtan,
my family Dr told that after 1 year and 3months we taken western blot its negative only so no need to worry…go and continue ur normal life….can i put end for this and move on?i am going to get married….
Hi ramesh,
You can ask me this same question a hundred times and a hundred times I will give you the same answer: stop worrying. You do not have HIV. Congratulations on your upcoming wedding.
rgds
Dr Tab
Hi DrTan,
one last question.. 2 years before i had intercourse with a girl….at that time my friend suggest me a tablet to prevent Hiv… i have taken that twice a day for two days after 3 to 4 days or my exposure…i dont know its antibiotic or PEP.. after that 6 months later i had intercourse with a lady…. my last exposure was 1year and 4 months back…now i did
*HIV1/2(ab,p24Ag/serum,Elisa) is Non Reactive and also
* western blot test is negative only….
is this two test is OK to conform 100%?
will antibiotic or PEP extend the window period???????
i was really confused….. help me….
Hi ramesh,
I am extremely concerned that your friend is selling false remedies for HIV. There is no such tablet that is taken ‘twice a day for two days after 3 to 4 days’ of exposure that can prevent HIV. Please tell your friend to stop spreading such malicious lies. It is extremely harmful to you, the community and to our efforts to combat HIV around the world. As for your question: Your tests are enough to be conclusive. You do not have HIV.
rgds
Dr Tan
Hello dr
Sorry it’s my last question really, if I had tested 24 days less than one year it’s also finish& done?
Hi Peg,
It is absolutely accurate. In fact it only takes 3 months for the test to be accurate.
rgds
Dr Tan
Hello dr tan
It’s mean I am HIV free & can I get married?I don’t need retest? Thank you dr youre the best dr in the world thath I ever seen. I hope every body have a lucky chance to know you, God bless you!
Hi Peg,
No you do not need a retest. Please forget all about HIV and go get married. Thank you for your kind words.
rgds
Dr Tan
Dear Dr. Tan,
Thank you for your time and energy answering my questions!
I had a unprotected sex with a guy on July 28th, 2011. ( p.s. I had never that experience before, just because I was drunk then , I do not know his HIV stutus, he said he did a lot oral sex with different guys.) Strictly speaking, we had no sex indeed, just masturbation exch other. He wants to do the oral sex to me , but I refused. I stroked his body and sexual organ, I saw his secretion. Later he touched my sexual organ with his ( p.s. I do not know how he dealed with his secretion , I guess maybe he daubed on his belly. My sexual organ has foreskin. ) Later , I sat on his belly ejaculated. I am very anxious if he put his secretion on his belly and I sat on that place, the virus will go into my body through anal ?
After that experience, about 2 weeks later , I had so mang symptoms,such as diarrhea, dizzy, sour throat,strength, always exhausted, headache,rashes, some times joints hurt and muscles hurt. I had four tests since then, ( 2 weeks later, 6 weeks later , 12 weeks later and 15 weeks later, they all came out negative! p.s. first three tests were ELISA, and the fourth one was RNA PCR with virus load—not detected)
Dr Tan, do you think I am clear about HIV? Do I need further tests? I am SO anxious about it, please let me know. （p.s. rignt now is about 17 weeks , my tongue has some red spots, more and more! According to your experience, have you seen the HIV infectious person, their tongues have red sopts? )
Many regards,
Anxious person
Hi anxious person,
You have only 1 test that we can rely on to be conclusive and that is the ELISA test at 12 weeks post exposure. That is good enough for us to be sure you do not have HIV. Since we have come to that conclusion, there is no need to analyse the exposure risk. Also, we can conclude that all your symptoms are NOT due to HIV. I have given this same advice many times today already: Do not be so caught up in worrying about HIV that your neglect the possibility of other diseases. You should see a doctor to find out what is causing all your symptoms. The one thing we can be sure of is that it is not HIV. In the future please remember to always use a condom and stay safe.
rgds
Dr Tan
Thank you very much doctor! For that issue, there is no doubt that I made a crazy mistake, I will never do that again. Thank you again ! God bless every kind people !!! ( p.s. is EIA the abbreviation of ELISA ? )
Best,
anxious person
Hi anxious person,
EIA – Enzyme Immuno Assay, ELISA – Enzyme Linked Immuno Sorbant Assay. More or less the same.
rgds
Dr Tan
Doctor Tan,
Excuse me for a lot of questions. Strictly speaking, I had
first three tests as EIA ,but not ELISA. ( The latest of
that test was 12 weeks/84 days ). After that I had the
fourth test at the 15th week of RNA PCR, with viral load—
not detected. Anyway I am 100% clear about that issue,
Right?
Please tell me which test you think is the most accuracy,
ELISA? Rapid Test? Western Blod? RNA PCR ? DNA PCR ? or
P24 ? What are their window periods? Thank you!
Best,
Your friend
Hi anxious person.
Each and every HIV test has their own uses in different situations. There is no such thing as which test is ‘most accurate’. You can find information with regards to all these tests on http://www.drtanandpartners.com/hiv-testing/
rgds
Dr Tan
Hi Dr. I had sex with sex worker before 3 months back. i tested for HIV antibody after 3 months and got negative. But still i have some white patch on tongue. Still i am worry about HIV. what are the rare case of turning positive after 3 months. please suggest
Hi milind,
Modern HIV tests are all accurate at 3 months. You do not have HIV. You should see your doctor with regards to the white patches on your tongue. It could be a lot of things but the one thing it cannot be is HIV.
rgds
Dr Tan
Thanks. even I have tested for STD.syphils got negative.waiting for other result.Also i forgot to mentioned. i also got painless ulcer on inside cheeks.
Hi milind,
I hope all your other results turn out well. Do not attribute all symptoms to STDs. Having a white tonge and painless ulcer on your buccal mucosa might indicate other diseases. You should speak to your doctor about that.
rgds
Dr Tan
Thanks alot.. you are doing great job.
Hi milind,
You’re welcome. Thank you.
rgds
Dr Tan
One more question, PCR test done on day 15 is conclusive? some site say that after 28 days is conclusive? I did pcr test after 15 day and got negative.
Hi milind,
Depends on which PCR. An RNA PCR at day 15 is conclusive. A DNA PCR is not.
rgds
Dr Tan
Hi Doc,
As I am negative after 3 months.. I do not have HIV. But still i am facing problem like weight loss(Initial was 81Kilo and now its 78.6Kilo). If some one is having HIV so after 4 month what will be percentage of loss of weight is expected? My mind is always thinking about 6 months window period. worried alot still.
Hi milind,
There are many causes of weight loss aside from HIV eg thyroid disease, cancer etc. I suggest you see a doctor and find out what exactly is causing your weight loss. Weight loss in HIV infection usually occurs late in the infection when the patient develops AIDS i.e 8 to 10 years from infection. Do not be so caught up in worrying about HIV and leave whatever illness you have that is causing your weight loss undiagnosed.
rgds
Dr Tan
With latest ELISA, Is there any case known as 3 month negative turned positive at 6 month in clinical history?
Hi milind,
No there isn’t.
rgds
Dr Tan
Dear Dr, how much the STD test cost for Herpes, Syphilis, Gonorrhea, Chlamydia and NSU in your clinic??
Hi Dev,
A full STD screen including tests for Syphilis, Herpes 1, Herpes 2, Hepatitis A, B and Cm Chlamydia, Gonorrhea, NSU (Mycoplasma, Ureaplasma), Streptococcus, Yeast and General Culture will cost $390.
rgds
Dr Tan
Hi Dr Tan, Thanks in advance for spending time in this forum.
I had unprotected sex with a sex worker in KTV two months ago. I did my P24 combo assays in one of the Clinic and blood sample sent to Gribbles Malaysia on 21 days and 40 days post exposure and the results came back both negetive.
The clinic” Dr told me that with both tests result are negetive,i am HIV free and move on with my life .no matter what ever symthom i have from the result date.
As i noticed from your reply to others , You are also very confident with P24 combo assays too like my Dr.
Dr Tan ,may be you can give me an advise or explaination .
(1)Is the window period will apply differently when a different type of testing method is using like P24 combo assays?
(2)said in P24 combo assays ,what is the window period ?
(3)Is it conclusive for my test after these two tests ? or do i need anymore test after 12 weeks again ? waiting time for result is really killing me. we need 1 working week on the P24 combo assays result in malaysia.
Hi Jack,
1. Different HIV tests have different window periods. 2. The P24 test must be done between 3 and 6 weeks post exposure 3. You do not need anymore tests. I completely agree with your doctor that you do not have HIV. Its time for you to forget this and move on.
rgds
Dr Tan
Hello doc,
So sorry to bother you. I just wana ask, i have unprotected receptive oral sex with a guy (having the guy’s penis in my mouth) weeks ago, and i have a blood test 4 weeks later. It was a 3rd Generation ELISA test. It came back negative. It is heard tat infection through oral sex is extremely low, combined with sources indicating 3rd Gen test at 4 weeks post exposure is around 95%, can i rely with these results? Plus, before the exposure i have chickenpox, and recovered during the exposure.
Hi Luke,
Do not mix up the 2 issues. Risk stratification and testing accuracy are 2 different things. Having low risk does not increase the accuracy of the tests. The fact remains a ELISA test at 4 weeks post exposure cannot be deemed as 100% accurate. You need to repeat the test at 12 weeks.
rgds
Dr Tan
sorry doc. i perfectly understand even the risk is low will not improve accuracy of the testing. but is it likely for me to be positive post 12 weeks exposure?
dear doc,
9 weeks ago, I had anal sex with a boy. we started off using condom, but he could insert it into me, and he saw some blood, indicating i was hurt. he took it out, and took off the condom. he tried to insert it into me again, maybe he did, but after struggling for 5 seconds, he gave up and we have mutual masturbation. is it likely he transmitted hiv to me? i mean, he didn’t insert it more than 5 seconds.
sorry doc. mistaken abit here. my encounter was at 5th of july. i went for a HIV ELISA test on the 11th oct (about 98 days?) and it came back negative. so am i risk free?
Hi Cw,
Thank you for adding this extremely important part of the history. I was actually getting rather worried for you. But the fact that you had a negative HIV ELISA test at 98 days post exposure tells me you are free of HIV. Please stop worrying. The test is good enough for us to conclude that you do not have HIV. In the future please stay safe and remember to use protection.
rgds
Dr Tan
Haha. I’m so sorry doctor. At first i was scared too, because my memory was a bit blurry and I can only be sure the event took place before he left overseas at 23rd Sept. Then, after browsing through my chat history, i found out the date was exactly 5th Sept, because it was a spontaneous appointment and we meet in a rush.
Hi Cw,
No worries. I’m just glad you are OK.
rgds
Dr Tan
Hey doc. during the 3 months, i had chickenpox infection. will it affect the window period?
Hi Cw,
No it will not.
rgds
Dr Tan
Hi Cw,
The duration of insertion does not affect the risk. Receptive anal sex is a high risk sex act coupled with the fact that you noticed bleeding which suggests that there was a tear in the rectal mucosa which increases the risk further. If this boy has HIV, then I am afraid your risk if definitely significant. If this happened within the past 72 hours, you should see your doctor about possible PEP treatment.
rgds
Dr Tan
Dr. Tan,
I had unprotected sex on May 1, a week later I found out I got Chlamydia from the guy. I had a oraquick rapid saliva test that week, and again at 76 days (around 10 weeks). Both were negative. Am I in the clear or should I go back for another test?
Thanks
Hi angiebabe,
You should have another HIV test at 12 weeks post exposure to be sure. You should also have a re-test for Chlamydia after you have had treatment to make sure its gone. You also should screen for other STDs such as Syphilis, Gonorrhea, NSU and Hepatitis B.
rgds
Dr Tan
hi DrTan,
will stomach ulcer affects the window period?
Hi ramesh,
No it would not.
rgds
Dr Tan
Dear Dr, is thrush can spread alone from one person to others through oral contact?? Or which occurs only due to immune compromised disorder such as HIV and cancer?? because of this fear only,I got tested for HIV at 5weeks and 9weeks.. Can thrush curable?
Hi Dev,
Thrush usually only occurs in people who are immune compromised. Thrush is curable.
rgds
Dr Tan
Which means, still I have the chances to become HIV positive on my upcoming test Is it??
Hi Dev,
It is certainly possible but not probable.
rgds
Dr Tan
Hello, Dr. Tan,
My name is Jivan. I had protected sex, with a sex worker on September 25th, 2011. I used a condom and had oral and vaginal sex. I have since been panicking and having anxiety attacks and cannot function normally. I went to get a rapid test done 3 weeks later in October and it came out negative. I thought everything was ok until i started having some diarrhea nad started feeling sick. I went to a doctro last week and they took blood samples and stool. I lost some weight within that time period and was worried to death I might have some illness, particularly hiv. I am still worried. Just yesterday, November 2nd, 2011 I went back to get a rapid test done, both tests were finger prick. I beilve it has either been 5-6 weeks since that time I had sex. The test thank God came back negtative. I’m still worried since i’m having some diarrhea and worried if the blood results come different from the rapid hiv test results? Who should I believe? How accurate is the rapid finger prick test within 5-6 weeks? Thanks.
Hi Jivan,
You are being much more worried than you need to be with regards to HIV. Your exposure risk is extremely low since you used protection throughout. Furthermore, a rapid HIV test at 5 weeks post exposure is very close to 100% accurate. I’m sure your blood test results will show the same. I think you need to forget about HIV and focus on finding out what is causing your diarrhea.
rgds
Dr Tan
Dear Dr.
Will STD (excluding HIV) impact the CD4/CD8 ratio?
Is Cd4/CD8 ratio used for HIV deduction?
Hi ravi,
No it would not. CD4/CD8 ratio cannot be used to diagnosed HIV.
rgds
Dr Tan
hello Doc,i took a rapid test 18days after uprotected sex.it was negative.can tghat conclusive with rapid test?
Hi worried,
I’m afraid a HIV rapid test is nowhere near conclusive at 18 days post exposure. You need to repeat the test at 6 weeks post exposure.
rgds
Dr Tan
Dear Dr. Tan,
Will recently cured from chickenpox before exposure will effect the window period?
Hi Andrew,
No it will not.
rgds
Dr Tan
dr ,is 12 week can 100%clear? i come from malaysain and the malaysian dr say the hiv window period is 2 years is this true ?help me pls! how long i nid to wait to clear it?
Hi vincent,
A negative test at 12 weeks post exposure is conclusive.
rgds
Dr Tan
Dr Tan,
I had unprotected vaginal sex with a female on 26 October 2011. She tested negative for HIV approximately a week prior on 17 October 2011. She had the HIV Duo test.
I appreciate the risk of HIV infection is very low:
1 – she is almost certainly not HIV positive
2 – I am circumcised and am told the risk of HIV infection is significantly reduced
3 – the chances of infection from one time vaginal sex are low?
I am thinking of taking the HIV DUO test – is that the best test and at what point would the test produce an accurate result?
What about the HIV PCR test? How accurate is that test and at what point can that test be taken?
Many thanks
Hi Adam,
You have 3 choices 1. HIV RNA PCR test at 12 days post exposure – 100% accurate 2. HIV P24 Ag/Ab Combo Test at 28 days post exposure – 100% accurate 3. HIV Rapid Ab test at 1 month post exposure and again at 3 months post exposure to be 100% accurate.
rgds
Dr Tan
Dr,
Many thanks for your response. I have a follow up question.
How accurate is the combo test 21 days post exposure?
Many thanks
Hi Adam,
Not good enough to be 100% conclusive.
rgds
Dr Tan
Dr,
Thank you for all your help and advice.
May God bless you.
You are an angel in human form.
Hi Adam,
Thank you for you kind words.
rgds
Dr Tan
Dr,
As stated in my previous posts I had sex on the 26th of October.
Today (17th November) I have been to the sexual health centre for a test.
The doctor said the test used is a 4th generation assay which tests for antigen and antibodies. I assume it is the duo/combo test (he did not use either of those two words). He stated that the antigen test can be taken 2 weeks post exposure but then went on to say that the manufacturers state the test is conclusive 6 weeks post exposure.
However, importantly, it was the doctor who suggested I take the test today rather than wait another 3 weeks. I am finding it difficult to reconcile the words spoken by the doctor with his actions (ie taking a sample of blood today instead of advising me to return in 3 weeks time).
I note you stated that the combo test is not 100% conclusive after 3 weeks. However, please note that my personal circumstances are such that I had to take the test today. How accurate is the test 22/23 days post exposure?
I would also like to ask how long the HIV virus can ‘survive’ outside of the body?
Many thanks
Hi Adam,
Did you ask the doctor why the discrepancy between advice and action? A antigen antibody test is a combo/duo/4th gen test. They all mean the same thing. I would put the combo test accuracy at 22/23 days at 99.9% accurate. HIV is a virus so technically it is not ‘alive’ so technically to ask how long it can ‘survive’ really cannot be answered. What you should ask is how long it can remain infectious outside the body. This then depends on the conditions of storage. In blood stored in a blood bank, HIV remains infectious for months. In a syringe filled with blood, it will be minutes. When exposed to air, it depends on what kind if surface it is on (longer in porous and shorter in non-porous), the ambient temperature and several other factors. Overall, most scientists believe it is in the manner of seconds that HIV loses its infectivity when exposed to air.
rgds
Dr Tan
Dr,
I am kicking myself for not being more forthright, but not all doctors have a nice bedside manner.
The doctor was not the talkative type. In any event, I sensed a clear reluctance to commit himself to saying the test result will be so highly accurate. I think he will have simply repeated the comment re manufactureers stating 100% conclusive after 6 weeks, NHS policy would have dictated he say as such.
The test was on the NHS and therefore free of charge. Common sense would dictate that he would be confident of the accuracy of the result otherwise he would have asked me to return in 3 weeks time rather than waste NHS resources.
If negative, I assume, given the 99.9% accuracy, that I will not need to retest?
PS – how are the days calculated? Did I take the test on day 22 or day 23?
Many thanks
My apologies for being a nuisance.
Hi Adam,
No apologies necessary. Your questions are very relevant and your conclusions very insightful. I absolutely agree with you about NHS dictating what your doctor says. We have the same problem here with our Ministry. Often, science and policy are mismatched and doctors are caught in the middle. According to the current science, a combo test at 3 weeks is good enough to be conclusive. However, because the P24 is not an ‘officially’ recognized screening test, many doctors are reluctant to commit themselves. We generally take the day immediately following exposure as Day 1 (regardless of the hours). There is however no need to go down into minute details like how to calculate days. This is because like all things in medicine, the rise of the P24 antigen in the body is a smooth curve so changes by the minute. Days are used simply because it makes statistical analysis easier.
rgds
Dr Tan
Morning Dr Tan,hope you can remember our previous conversation , just want to know is ulticaria related to HIV infection ( after 11 weeks post exposure) ? I still have this itchi spot on my body . Two or three spots in 24 hours,
Can skin problem will persist until 11 weeks from exposure once infected by HIV ,
For your info again , I had negative result on my 21 days and 41 days p24 combo tests from gribbles Malaysia.
Do I need re test and now is 77 days from exposes . And what test u recommend if needed ?
Best regards
Hi KK,
You do not need to re-test. You do not have HIV. You should see a doctor to have your Urticaria properly diagnosed and treated. Urticaria can be associated with auto-immune diseases and can become chronic.
rgds
Dr Tan
Dear Doc,
4 weeks ago, i gave a man a blowjob and he came inside me. 4 weeks later (about 32 days) i went for an ELISA HIV test, and it came back negative. I’m going to take anothr HIV test in 3 months post exposure, should I be worried if it might be positive? Based on your own knowledge and experience, how likely is the results positive post 3 months exposure?
Hi Worried,
The risk of catching HIV via oral sex is extremely low. Furthermore a ELISA test at 4 weeks post exposure is already rather accurate. The likelihood of your 3 month test being positive is miniscule. Very close to zero I would say. You really need not worry.
rgds
Dr Tan
Dear Doc,
If i have other STDs, will my risk increase? During the ELISA test, I also did a VDRL and THPA and something called a Rheumatoid Factor. all came back negative though
Hi Worried,
Yes, your risk will increase if you have an STD that causes ulceration or inflammation in your mouth or throat. The usual suspects are Syphilis, Herpes and Gonorrhea.
rgds
Dr Tan
Does the test I’ve taken shows I’m negative for STDS?
Hi Worried,
No. VDRL and TPHA are both tests for Syphilis. Rheumatoid factor is a test for Rheumatoid Arthritis. All the other STDs are still not tested for.
rgds
Dr Tan
So, including the elevated risk if there is presence of STDs infected during exposure, i have a few question:
1. Is it only the factor of ulceration and inflammation on the throat increases the risk of transmission?
2. Will i be able to feel these ulceration or inflammation if i have it?
3. What will be my overall chance to be tested positive 3 months post exposure?
Hi Worried,
1. No. Anything that compromises the mucosa e.g. cuts and lacerations will also increase risk. 2. Most likely yes. But some ulcers like those due to Syphilis are painless. 3. There is no way to precisely determine.
rgds
Dr Tan
Okay. One last question then. Based on your expertise and experience on your cases, will I be positive post 3 months exposure?
Hi Worried,
No you will not. If I was a betting man I would even be willing to bet on it.
rgds
Dr Tan
Thank you Dr. Tan. I appreciate every piece of advice and reassurance, and patience you have gave me for the past 3 days. I hope it will be good news for me by 3 months. Thank you
Hi Worried,
I’m sure you’ll be OK. Please share with us the good news.
rgds
Dr Tan
Dear doc, even with my increased risk from other possible std infections? you’re sure i’ll be fine?
Hi Worried,
Do not scare yourself with all these considerations. It serves no other purpose than to worry you even more. The fact is your risk is miniscule. You’ll be fine.
rgds
Dr Tab
Hi Dr. Tan,
Is a 6 week rapid HIV test that comes out negative a sure bet? If I retest within 2 months, could it come out positive?
Hi Jivan,
I’m afraid nothing is medicine is a ‘sure bet’. Statistically speaking results at 6 weeks is as good as 100% accurate. Of course they is always a possiblity that you can test positive later but the probability is not high.
rgds
Dr Tan
Thank you Dr Tan..(*_*)
hi DrTan,
5 months before i tested for Hepatitis c its positive and the quantitative of viral load was less than 15 range only…doctor told me it will cure automatically if that viral load not increases again..last two months i tested for Hepatitis c its negative…..it means??? iam cured or not… there is any chance to get positive again???
Hi ramesh,
This is a HIV forum and really not the right platform for giving advice on Hepatitis C. You should listen to your doctor’s advice.
rgds
Dr Tan
Hi DrTan,
thanks a lot
Dear Dr, I have 2 queries..1. if I need to test for HIV in anonymous testing center like yours clinic, do I still need to give my NRIC,ID card, address proof or anything else? 2. Incase the test result become positive(even after the confirmatory test), what will be the next action you should take?
Hi Dev,
No. We do not need any form of identification for anonymous testing. For details please see: http://www.drtanandpartners.com/anonymous-hiv-testing-at-our-clinic/
rgds
Dr Tan
greeting from america. i had a unprotected episode, i know very careless of me, but i was giving a oraquick antibody test 2 1/2 weeks, and 3 months after possible expose both test were negative. i wanted to ask u that the doctor pricked my finger for 1 drop of blood. was that enough? because on some websites i see where they say a few drops of blood is required for accurate detection for hiv antibodies.
Hi erica,
Greeting from Singapore. The Oraquick test actually requires even less than 1 drop of blood. I believe your doctor used a plastic loop to pick up the drop of blood and place it in the bottle of test fluid. As long as this loop was filled, that is enough blood. It takes a fraction of a drop of blood to fill the loop. I’m sure if it was not enough, your doctor would have repeated the test for you.
rgds
Dr Tan
actually the doc didn’t administrate the test, one of the counselors did. i was at a point of care site, not a hospital, and how sure is a accurate negative antibody result with symptoms?? i have had weight lost, neuropathy in both hands and feet and a rash. all these symtoms had lasted well over 3months is it possible that both my test was wrong. how do i know if the antibody test i took was the latest generation please help me out doc
Hi erica,
We cannot rely on symptoms to diagnose or rule out HIV. There are many possible causes of your symptoms. Do not presume everything is related to HIV. I cannot comment on which generation antibody test was done for you as I was not the one that conducted the test. You should clear these doubts you have with the counsellor. You also need to see a doctor and find out what is causing your symptoms.
rgds
Dr Tan
Hey Doc,
I had protected sex with a Sex worker.But my problem is that Doc,she was very wet all the time we had sex for 3hrs. And alot of fluids were around ma public hair,my balls and unprotected part of my rocket.2 wks later i have developed patches like rashes.What my chance of being infected if she was positive.Thanks Doc.
Hi Never again,
Your risk is extremely low. Let me explain why. You had a condom on. Which means that the areas that are at risk of HIV entering the body (i.e. the foreskin and urethral opening) are covered and protected. HIV cannot penetrate intact skin. So although there was vaginal fluid that possibly contained HIV virus on exposed skin, the HIV virus cannot penetrate the skin and cause an infection. Also, 2 weeks is a little too early for ARS symptoms so I am sure your rashes are due to something other than HIV. There is really no reason for you to be overly worried about HIV. However, you need to be on the lookout for other STDs.
rgds
Dr Tan
hi dr tan..
what diluent made from and does it dangerous to us if it expose to our skin?
Hi very worried person,
By ‘diluent’ are you refering to the Chase Buffer that is used to run the Determine test? If so, then it is completely not toxic. You can refer to the Material Safety Data Sheet on the Determine Chase Buffer which is readily available for public access on the internet.
rgds
Dr Tan
hi dr tan
bit curious…
yesterday i take the rapid test kit EZ-trust HIV 1&2
after about 25 minutes the results is negative, after that i accidently scrathes the place that reading line appear.is it ok?can i get infected hiv??
this the link for dr tan to refer what i mean
http://www.hivtest.com.my/product.php
Hi very worried person,
I highly doubt it as these tests only use antigens and not the whole virus. If you are in doubt I suggest you contact the company you bought the test from.
rgds
Dr Tan
hi dr tan
what is antigen?
can i get affected hiv with these antigen?
Hi very worried person,
Antigens are bits of protein. You cannot get infected with HIV by being exposed to HIV antigens.
rgds
Dr Tan
Hi Doc
3-4 days ago (2 Nov and 3 Nov), I had unprotected oral sex with another man whose status I do not know. I was the receiving partner (he was performing), and the whole thing lasted maybe < 10 s with no ejaculation. Also at some point he placed his fingers in my mouth, could not tell what was on them but quite sure it wasn't blood.
Based on this, what do you think my risk for HIV is?
Also, what other STDs do I need to get tested for, and when can i take the tests?
Thanks..quite worried now..
Hi j,
Just to make sure I got it right, you were the receptive partner and he was the insertive partner? i.e. you used your mouth on him? This is an important detail before I can give you my opinion.
rgds
Dr Tan
no, sorry..i got the terminology mixed up. He used his mouth on me.
Hi j,
Your risk of HIV is extremely low. Almost as good as zero I would say. You really need not worry. You are however at risk of urethritis which can be caused by Chlamydia, Gonrrhea, NSU (Mycoplasma, Ureaplasma), Streptococcus etc.
rgds
Dr Tan
Thanks doc, I feel somewhat better now.
I guess I am a bit more concerned about the part where he put his fingers in my mouth, as i was not sure what was on them.
The past few days I was stressing about whether or not to take the PEP, but decided against it in the end.
anyway, thanks so much for your advice
Hi j,
Even if there was blood on his fingers, your risk of HIV is still low. Even if you saw a doctor it is very likely that he would have advised you NOT to take the PEP.
rgds
Dr Tan
can’t seem to reply to the last message, so replying here.
thanks doc .. you have helped me feel a lot better .. thanks especially from replying so promptly and on a public holiday as well/
Hi j,
You are welcome.
rgds
Dr Tan
hi doc,
i am from india…
i got tested after 102 days in our government sponsored testing centre …result was negative both hiv1 and hiv2…
it was a finger prick test ….i got results within 5 minutes ….. the testing kit brand was some SD BIOLINE FOR HIV 1 and HIV 2 …. the counsellor told u have to reconfirm at 6 months …… do i have to reconfirm or 102 months is enough …..
thanks and regards …..
Hi fromindia,
I am unfamiliar with the accuracy of the SD BIOLINE. I suggest you follow the recommendations of the counsellor.
rgds
Dr Tan
hi doc….
SD BIOLINE is a 3rd generation rapid test finger prick type kit …..
i got a negative result on 102 days ….
what will be the accuracy ??
thanks and regards ….
Hi fromindia,
Every HIV test has its own statistics on sensitivity and specificity. Not all 3rd gen tests are identical. I suggest you pose your questions to the medical personel who conducted the test for you.
rgds
Dr Tan
Hey doc.
Last time in a gay bar, i met a man and we did mutual masturbation. Later during the activity, he say I got insert my penis in his anal, which i don’t recall of, but if we did, it was very brief because we came on each other’s chest by masturbation. 4 weeks later i did a 3rd gen ELISA test, and it came back negative. Do i have HIV?
Hi Help,
Mutual masturbation has no risk of contracting HIV. However, if you did practice unprotected insertive anal sex, then you are definitely at risk. All this is assuming your partner is HIV positive. A 3rd Gen HIV Test at 4 weeks is very accurate but unfortunately we cannot presume it to be conclusive. In summary, I think the chance of you having HIV is extremely low but you will still need to do a repeat test at 3 months to be 100% sure.
rgds
Dr Tan
Dear doc,
Is a 30days post exposure ELISA 3rd Generation a good indicator of someone’s HIV status?
Hi Carl,
Yes it is a very good indication but cannot be presumed to be conclusive. If negative, a repeat test at 6 weeks in needed. If positive, a confirmatory western blot is required.
rgds
Dr Tan
Doctor, about 41 days ago, i received protected oral sex from a lady and the condom didn’t break. And 3 days later i went to had chlamydia and gonorrhea urine test and was found to be negative. About 16 days and 38 days later i did a Rapid Fingerprick Blood HIV-1/2 P24 Antigen/Antibody Combo (HIV Duo Test) on both, and was also found to be negative. And recently, my penis the duct seems to hurt after one occasion of masturbating with moisturizer which seems silly. Do i need to do any more gonorrhea or chlamydia testing and should i repeat one more hiv testing though i know my risk is very low. Do advise me doctor
Hi Andy,
First of all you do not have HIV. So please put that out of your mind. Secondly, pain in the duct of the penis could indicate urethritis. I suggest you repeat tests for Chlamydia and Gonorrhea and also test for NSU (Mycoplasma, Ureaplasma), Trichomonas, Yeast and Streptococcus. You might also require a Urine FEME and General Urine Culture. This is because Urine Tract Infections (non-STD related) can also cause pain in the Urethra.
rgds
Dr Tan
Thank you doctor, just wondering do u know whether DSC provides such services (urine testing) cause i couldn’t find such services in polyclinic. Doctor one last question, what is enlarged lymph node at the groin area?
Hi Andy,
Any GP clinic and certainly DSC has this service. There are lymph nodes along the groin line know as the inguinal chain of lymph nodes. If these lymph nodes are swollen for any reason, it becomes an enlarged lymph node.
rgds
Dr Tan
thank you!
Hi Andy,
You are welcome.
rgds
Dr Tan
Hello
I am worried about herpes and warts.
How can women be tested for them and when – can herpes be tested for in blood- can warts be tested for in blood – how soon after sex would i show symptoms?
I have a tingly feeling in my genital area – top part of genital area not on my vagina – what is the cause of that?
Hi Steph,
Herpes can be tested from the blood at about 6 weeks post exposure. Appearance of symptoms can be extremely varied. It can take a week of even months to show symptoms. Warts cannot be tested for. However, cancer causing HPV can. Warts can take years to appear after infection. For women, infection from cancer causing HPV is far more important that infection with warts causing HPV. There are numerous causes for your symptoms. Both STD and non-STD related problems can cause a tingling feeling in your genital area. It is impossible to make a diagnosis without a proper consultation, physical examination and maybe some tests. You need to see a doctor. If you wish to see me, I will in at my clinic at Robertson Walk this week except Tue and Thur mornings. For more info on HPV please see: http://www.drtanandpartners.com/should-i-take-a-hpv-vaccine/ For more info on herpes please see: http://www.drtanandpartners.com/herpes/
rgds
Dr Tan
hi doc ,
RAPID FINGER PRICK TEST KIT “SD BIOLINE” INFORMATION IS AS FOLLOWS …..
3rd Generation Method (Direct Sandwich Method, Ag-Ab-Ag)
Serum, Plasma, Whole Blood
Detects all antibodies including Subtype “O”
Highly sensitive, even to IgM during early infection stage
Differentiation of HIV-1 and HIV-2 by clear 3-line formation.
Sensitivity: 100%, Specificity : 99.8%
Capture Ag: HIV-1 (p24, gp41),HIV-2 (gp36)Ag
Evaluated by WHO (Sensitivity 100%, Specificty 99.3%)
Procured by WHO,UNICEF, etc.
Long shelf life: 24 months at Room Temperature
please tell me the accuracy it has in 102 days ……
i tested negative on 102 days …..
thanks and regards …..
Hi fromindia,
Thank you for the information. But as you can see, there is no mention of comparison to standard seroconversion panels. I am really unfamiliar with this test. Instead of asking me, I think the most logical thing to do is to ask the medical personel who conducted the test for you. He will be most familiar with the performance characteristics of the test. I really do not see why you are so reluctant to do this.
rgds
Dr Tan
Dear doc,
I heard that the CDC claims most people will show up positive an average of 25 days after infected on a 3rd generation test? Personally and based on your years of testing, have you ever witnessed anyone tested negative after 4 weeks of exposure, but positive the next time using a 3rd generation test? Don’t get me wrong that i am challenging your expertise or anything. I have no intentions of doing so.
Hi Luke,
The CDC is absolutely right. I personally have never seen anyone test negative at 4 weeks and positive later on. In fact, in several states in the US, the recognised window period has been cut to 6 weeks. However, since I practice in Singapore, I am still bound by guidelines set by our Ministry of Health which recognises a window period of 3 months. As doctors, we fight a constant battle between science and policy. So although the science shows that a 6 weeks window period for a 3rd gen test is more than enough, I am still bound by the policies of the Ministry to advise a repeat test at 3 months. It is far from an ideal situation but it is what it is.
rgds
Dr Tan
I see. I’m really sorry if i had offended you in anyways in terms of your profession advice. It is because my family is quite traumatised by the activites that i had done and do not allow me to do another test post 3 months. The only test i did was only 4 weeks post exposure. According to the guidelines in the health center, they claim it takes 3-4 weeks for the antibodies to produce detectable levels. So, my family claim the event has over.
Hi Luke,
I see. No worries. I am not offended at all.
rgds
Dr Tan
Dear doc,
have you seen people showing positive results post 4 weeks of exposure before then?
Hi Luke,
I have seen quite a few people show positive results within 4 weeks of exposure.
rgds
Dr Tan
HI DOC ,
WHILE TAKING THE FINGER PRICK TEST IF THE FINGER WHICH IS PRICKED TOUCHES THE SAMPLE COLLECTING POINT (SAMPLE WELL), IS THERE ANY PROBLEM OF HIV ….?
THANKS AND REGARDS ….
Hi fromindia,
You need to check the caps lock on your computer. No. You cannot get HIV this way.
rgds
Dr Tan
Hello Doctor,
First of all, I thank you for this great service.
I’ve had a relatively high risk exposure recently by having unprotected vaginal sex with a prostitute. The vaginal intercourse itself lasted for at most a minute before I realized my foolery and put on a condom. I was highly inebriated at that time.
Following the exposure, at 2 weeks, I did an OraQuick test which came out negative. From what I’ve gathered, the antibody test at 2 weeks will pick up infections for about 50-60% of infected patients, so to say the least, I am somewhat reassured.
I’ve not had any specific ARS symptoms yet, although it feels like my neck has some glandular swelling, as well as pea-sized lymph nodes appearing under my armskote (just one), and on the left side of my neck (just one too). I’ve been feeling fatigued, and my body temperature seems to be fluctuating, but I’m attributing it to ARS because there is yet to be a ‘fever’. Perhaps it is anxiety, I cannot be sure.
This thursday will mark my 3 week post exposure. I’d like to ask if a Rapid Fingerprick Blood HIV-1/2 P24 Antigen/Antibody Combo (HIV Duo Test) will be accurate at this point? The private clinic I contacted told me it would be a 96% accuracy, but I remain skeptical.
Do you think I should proceed with this test for a peace of mind?
Kindly advise sir.
I meant *armpit. It seems my national service stint has greatly influenced me haha!
Hi Dan,
I understand and empathise.
rgds
Dr Tan
Since my question is still under moderation, I’d like to add some more points, if you don’t mind Doctor. Feel free to delete/edit any posts you feel isn’t informative or educational to other forum readers.
I’ve gathered some points from many medical forums on the internet specializing in HIV prevention. These forums are attended by professional doctors (Medhelp, Mybody, just to name a few) who claim that clinical field experience in their day jobs should lend credibility to their responses as they look after HIV patients.
There are several conflicting information that is being passed around on these forums and I’d like your evaluation on these points if you’re so kind as to oblige Sir.
I’ve researched their archives.
1. It seems that heterosexual intercourse is considered a low risk activity as opposed to other routes of transmission, yet it is the most prevalent in most industrialized countries, including Singapore. Experts estimate a 1/2000 probability for an insertive penile-vaginal exposure, assuming that the couple is indeed discordant. The risk doubles when the male is uncircumsized, and increases if a con-current STD is present.
My questions:
i. The probability stated at 10 in 10 000 exposures simply means that per 10 000 acts of sexual intercourse, there are 10 reported cases of infection. But each sexual act is independent of each other, and as far as I know HIV transmission risks does not compound on top of each sexual act. Meaning an individual sexual act is as risky as the next, and having multiple exposures simply increases the risk due to the number of incidences as opposed to the odds of infection itself. If this is so, why is it still considered low-risk? Are the odds of 1 in 1000 truly accurate for such an account?
ii. If one were to have a history of STD as opposed to concurrently be infected with one during an exposure to a HIV+ person, are the risk increase the same, slightly less, or different? Personally, I’ve had a urinary tract infection before from a sexual exposure, but it has healed since although the groin lymph nodes still persist. I do not have any other symptoms apart from the enlarged lymph nodes.
Is UTI an STD? I did not observe any penile discharge.
iii. It was reported that it was very, very unlikely that patients report a positive infection after ONE unprotected sexual encounter. In your experience, have you treated any patients in similar circumstances that tested positive despite the low odds?
So sorry for these questions Doctor. My anxiety levels are off the charts and my mind is going absolutely berserk.
Thank you so much for your time, and for this service too.
My best.
Hi Dan,
Your posts are excellent. You have obviously done comprehensive research and your questions are very insightful indeed. I do enjoy such academic discourses very much. As for your questions:
1. Different scientific studies quote different risks. It usually ranges from 1 in 1000 exposures to 1 in 10,000 exposures (US CDC). You are absolutely right that each sex act is an independent risk event. So the risk if NOT compounded. i.e. if a person has 10,000 sexual exposures, it is NOT a 100% that he will contract HIV. But each sexual exposure is a roll of the dice. Although each role has the SAME probablity of infection. The question is how many times can you roll the dice and come out lucky?
2. Unforutnately, you cannot lump all 15 unique diseases into an all-encompassing term ‘STD’ and make general statements about them. STDs that cause ulceration eg Syphilis, Herpes, Chanroid increase the risk of HIV tranmission by breaking the protective skin barrier. The interesting thing about Herpes is it also changes the characteristics of our immune cells making them more susceptible to HIV infection even WITHOUT active herpetic ulcers being present. Also, Syphilis increases the viral load in HIV positive people making them more contagious. Chlamydia and Gonorrhea causes inflammation that increases the concentration of immune cells thereby giving more targets to the HIV virus. Although it has been argued that this is more significant for women than men. As you can see, this discussion is a long one and can go on for quite a few pages. As for your unique condition: I assume when you say UTI you mean Cystitis. Cystitis is NOT an STD. There are NO studies to show that Cystitis increases the chance of catching HIV. UTI can also be used to mean Urethritis which IS an STD and DOES increase the risk of HIV.
3. The odds are 1 in 10,000 as previously described. And, no, I have personally never seen anyone catch HIV from a single encounter.
You need to take a deep breath and calm down. The statistics are in your favor. You’ll be OK.
rgds
Dr Tan
You’re a real gentleman. Thanks for obliging with the encouraging responses.
I will most certainly attend your clinic to have my P24 Ag/Ab Combo test. Meanwhile, I’m still struggling mentally with my situation. I understand the odds and I am able to rationalize to a certain extent, but a man feels no safety in numbers after such an exposure. Can you believe it was actually my first visit?
I was diagnosed with Urethritis shortly before I started my national service. This was well over a year ago. I’m no longer suffering from any symptoms, but as I’ve mentioned before, the lymph nodes that swelled during my infection remain swollen. It may or may not be indicative of an uncured infection.
My last question:
Does having a history of urethritis increase my risk of HIV transmission even when I’m no longer suffering from its symptoms?
My best wishes to you and your service. I’d love to meet you up for a short chat when I visit your clinic.
Hi Dan,
Not having symptoms does not mean there is no inflammation. And inflammation does increase the risk of HIV. Having a past history of urethritis that has been adequately treated does not increase the risk of HIV. So the key is really to ask if there is active inflammation or not. The lack of symptoms suggest that there isn’t but there is really no way to be 100% sure.
rgds
Dr Tan
Hi Dan,
First of all you should not worry about symptoms. Symptoms are just too non-specific to be of any help. A DUO test at 3 weeks is very accurate but certainly not conclusive. Doing the DUO test at 4 weeks is much better.
rgds
Dr Tan
I notice there are 2 types of DUO tests. The one I’m referring to is the rapid finger prick one. Do you offer this at your clinic?
How often is it that patients test differently from 3 weeks?
Regards
Hi Dan,
Yes we offer the Determine P24 Ag/Ab Combo rapid test. It is done with a fingerprick sample. Are you asking the accuracy of the combo test at 3 weeks post exposure? I would say it is very good but not conclusive.
rgds
Dr Tan
Hi Doctor,
Just to be clear about the terminology, is this particular test also known as a 4th Generation test?
I’d still like to get tested at 21 days, I think I’d take my chance at the ‘fairly accurate’ probability. I’ve been suffering from sleepless nights.
Hi Dan,
am currently handling queries from many patients. I am in the process of re-directing this to a forum to allow better follow up of individual cases and it also makes it easier for people like yourself to find the relevant information that you need. As for your question, I really am unable to remember the details. Which test are you referring to?
rgds
Dr Tan
Dear Dr.Tan,
I had protected sex 4 weeks back. I want to know if i am at risk and what test do you recommend at this stage? Please let me know the accuracy of the test you prescribe at this time. I am in a lot of stress and I need your help.
Also i want to know are chances for male to get HIV from female more compared to vice-versa?
Hi Raj,
For the same sex act, females are at higher risk than males of contracting HIV. Do a HIV P24 Ag/Ab test. It is conclusive at 4 weeks.
rgds
Dr Tan
HI DOC ,
WHILE TAKING THE FINGER PRICK TEST IF THE FINGER WHICH IS PRICKED TOUCHES THE SAMPLE COLLECTING POINT (SAMPLE WELL), IS THERE ANY PROBLEM OF HIV ….?
DOES THE SAMPLE POINT (WELL) CONTAIN ANTIGEN OR THE ANTIGEN IS IN THE READING LINE AREA OF THE RAPID TEST KIT?
CAN ANTIGEN IF ENTERED INTO BLOOD STREAM CAUSE HIV?
THANKS AND REGARDS ….
Hi fromindia.
You really need to turn off that caps lock. No you can’t catch HIV this way. And the answer remains the same regardless of how often you ask the question.
rgds
Dr Tan
Doc,
When is the peak time to test for STIs post risk of infection. And why?
Will all STDs show at peak time of testing?
Hope the above makes sense.
Ta
Hi Jacob,
Each STD is a unique disease. Every STD will have its own ideal time to test. In the absence of symptoms, and for convenience to the patient, I advocate screening for STDs at 4 weeks post exposure. This is with the caveat and HIV and Syphilis tests are repeated and 3 months post exposure.
rgds
Dr Tan
How accurate is the OraQuick Advance Rapid HIV 1/2 oral fluid test at post 13 weeks from HIV exposure? Is the oral test at 13 weeks the same as a HIV 3rd generation blood test? I have read online that the above oral test has been known for false negatives.
Hi Larose,
Every medical test will have false negatives. As far as my opinion goes, the Oraquick test using saliva at 13 weeks post exposure is conclusive.
rgds
Dr Tan
Okay doc, This is my final question.
During early sept, I had an encounter with a guy. We started of with mutual masturbating, followed with me Inserting my penis into his anal for awhile, before finishing off with oral. He ejaculated in me during oral, but i did not ejaculate inside him during anal nor oral. I did a 4 weeks 3rd generation ELISA test and it came back negative. I’m going to do another test, same test, 3 months post exposure. How likely am i positive?
My health care center recomended me to test 6 months later. I guess i should wait till then too.
Hi Luke,
I really do not see a need to repeat the HIV test at 6 months unless your centre is using an extremely old test.
rgds
Dr Tan
my center says the window period is 3-6 months. so does it means i get tested after 6 months?
Hi Luke,
You should listen to the advice from your test counsellor as they are most familiar with the performance characteristics of the test kits they use.
rgds
Dr Tan
Hi Luke,
Going by the fact that you testes negative at 4 weeks I would say the chances of you being positive at 3 months is extremely low.
rgds
Dr Tan
is there more than 1 type of 3rd generation tests? or all 3rd generation is the same? my health centre is using the 3rd generation test for hiv 1 and 2 (it is stated in the report)
Hi Luke,
There are many different types and brands of 3rd gen HIV tests. They are not the same.
rgds
Dr Tan
so, although it is a 3rd gen test, the window period is not 3 months? My health center withdraws blood into syringes to be sent to a lab for testing. So, it should be a general ELISA test?
Hi Luke,
This is a question you should pose to the health centre. I do not know what test exactly they use and so cannot comment on the window period.
rgds
Dr Tan
hi dr i want to ask u a question is like that i have unprotec sex with a girl who have hiv + one time already 9 month and i have test 4 time 1week ,6week ,3month and 5month all result come no reative 1,2 time test use the methood is eclia 3and4 i dont know wat methood ,now dr iwant to ask u want me want restest or no 20.11.2011 is my wedding ,can i have normal life and put it end?
Hi wei long,
You do not need to test anymore. You do not have HIV. Please put this all behind you. Congratulations on your upcoming wedding.
rgds
Dr Tan
dear doc,
what exactly is an antigen? is there a difference between HIV antigen and HIV virus?
is it possible from your own personal experience and statistics that a person will test positive after 3 months though being negative before 3 months using the modern rapid testing methods?
and regarding the question i had asked u last time, during the finger prick test the pricked point of finger had touched the sample collecting point …… is that ok?
really sorry if i am pestering u with illogical questions ….. but i need ur kind advice ….
thank u and regards…..
Hi fromindia,
An antigen is a piece of protein. It is not a virus. The window period is dependent on the type of test used. You cannot get infected with HIV by touching a sample well of a HIV test.
rgds
Dr Tan
hi doc ,
let me make my doubt very clear to you …
while taking the rapid finger prick test …
the lab technician first pricked my finger and then instead of using capillary tube to collect the blood, he directly put the pricked portion of my finger which had the blood in it into the sample collection point to collect the blood …. i have heard that the rapid kit contains a membrane which has recombinant HIV 1 & 2 type antigens …..
1.so while touching the sample port is there a possibility of hiv infection ?
2.does the sample port have the hiv antigen in it or it is just in the test reading lines?
3.does hiv antigen exposure cause hiv?
sorry if i am being paranoid and repetitively asking the same question …
i hope u understood my doubt ….
thanks and regards ….
Hi fromindia,
It seems that going for the HIV test has caused you more worry than anything else. If this disturbed you so much, you really should have brought it up to the tester at that point. There is really no point in worrying about it now that it is all over. Anyway there is nothing to worry about, you cannot get HIV from touching the sample well.
rgds
Dr Tan
hi doc,
i was actually worried, since the picked portion of finger which had blood on it had touched the sample point ….
thanks a lot for clearing the doubt…
and finally can u please tell me whether if hiv antigen enters blood stream can cause hiv?
u are doing a great great job doctor…..
god bless u…..
regards….
Hi fromindia,
Antigens alone cannot cause a HIV infection.
rgds
Dr Tan
Doctor Tan,
Hi Paranoid?,
The rest of your message is missing. Please resend.
rgds
Dr Tan
Hi Dr.
I had a negative 5 week Clearview HIV 1/2 test, a negative blood test for HIV 1/2 Antibodies sent to a lab at 6.5 weeks, and had an OraQuick Saliva HIV 1/2 test at 9 weeks.
Risk was unprotected vaginal sex for a very brief period, no ejaculation.
Thank you for your time!
Hi K,
I do not acutally see a question in there. Are you asking me if you are conclusively clear of HIV? If so then the answer is Yes.
rgds
Dr Tan
Thank you, pardon me, that was my question
Would you still advise a 3 month test?
Hi K,
No I would not. You are OK.
rgds
Dr Tan
Thank you so much doctor just one more question if you don’t mind. I understand why policy is 3 months to account for those who won’t develop antibodies for another determined medical reason…So would the fact that I had three separate tests, although in the window period, by the reason you say I am okay?
Have you ever seen anyone turn positive after a 6 let alone 9 week negative?
Much appreciation for you and this site!
Hi K,
No I have not.
rgds
Dr Tan
dr i have unprotec sex with a girl hiv + 9 month ago and i have 4 test all test result come back no reactive the menthod is eclia 1st test at 1 week 2 at 6 week 3 at 3month 4at 5 month dr so i want to restest or no? 20 11 2011 is my weeding pls help me dr !
Hi weilong,
You do not need to retest.
rgds
Dr Tan
hi i sat and read this whole webpage..i am a female and i have herpes type 2 i had protected sex 4 weeks ago but i am still nervous because of all the paranoia behind hiv using the oraquick rapid test at 4 weeks i tested negative…should i still be extremely worried it has gotten to the point where i cant sleep at night
Hi hypochondriac,
I am very impressed with your patience and diligence. You are obviously worried because you read somewhere that having Herpes type 2 increases the risk of contracting HIV. I can empathise. But I can also tell you that the Oraquick test at 4 weeks post exposure is extremely accurate. As far as I can see, you risk of HIV is extremely low for 2 reasons 1. the sex was protected. 2. the Oraquick test at 4 weeks is negative. I think you should stop worrying and get some sleep.
rgds
Dr Tan
HI DOC,
a negative western blot test at 4 months will be 100%
conclusive? what other tests can be taken at 4 months to get a conclusive result?
thanks and regards…..
Hi fromindia,
A Western Blot is not and should not be used as a screening test. A negative Western Blot cannot be used to presume a patient is HIV negative. A HIV antibody test at 4 months is conclusive.
rgds
Dr Tan
Hi Doc;
Thaps from South Africa; i have been with my partner for 4 months now, we had unprotected sex since our relationship, i know i was so stupid, we went for hiv test (rapid test) on 14 October 2011, 4 weeks after exposure, I tested negative and she tested positive, this is so strange how did i test negative, if we were havin unprotected sex, i also went for further testing using Elisa 3 at 6 weeks which came back negative as well, now i just wana know what are my chances of staying negative in my 12 weeks test?
How do i deal with my positive partner, life is no longer the same.
I am also experiencing the symptoms like swollen lympth nodes on my neck and under my armbit, but lasted for 3 days, i just hope is my anxiety causing this symptoms, is it possible for someone to seroconvert at the 7th week?
Hi Thaps.
You really should not presume your symptoms are due to HIV. It is very unlikely for a person to start seroconversion at 7 weeks post exposure. You should see a doctor to have your symptoms properly diagnosed.
rgds
Dr Tan
Hi Thaps,
Your case is a very good demonstration of the fact that unprotected insertive vaginal sex has a very low statistical chance of contracting HIV. An ELISA test at 6 weeks is very accurate and the chance of your 12 weeks test turning positive is extremely low. I am unforutnately not in a position to advise you on how you should proceed with your relationship. However, I can tell you that with proper anti-retroviral treatment and the consistent and proper use of condoms, many sero-discordant couples carry on a healthy sexual relationship without transmitting HIV.
rgds
Dr Tan
Thanks Doc;
I am going to my 8th week test today, i believe and hope all will go well, I will ofcourse let you know of the outcome.
Hi Thaps,
Hang in there. It’ll be all good news soon.
rgds
Dr Tan
Hi Doc;
Iv done my test today on my 8th week, it came back negative, which is good news, however, i had a fallout with my Doctor because he said i didnt have to come and do the test now, i should wait for full three month, i then decided to go to a public clinic, they used LG Quick rapid test, i just dont know the accuracy of this test, again the expiry date of it is 2011/12/15, effectively is left with 1 month to expire, could it be that the near expiry test used temper with the accuracy of the result?
Hi Thaps,
Most medical devices have a safety period built into their expiry dates. In other words, even if you used a test kit AFTER its expiry date, most of the time it is still OK. So as long as it is within its expiry date, even if there is only 1 day left, it is definitely OK.
rgds
Dr Tan
Hi Doc;
Thaps again,
I am going on with my hiv tests, this week i did my 10th week 4th generation, it came back negative, howeve, i also did my blood type group test, of which i was told that i have O negative blood type, my qoestion is that is it possible for O negative blood type not produce hiv antibodies even though infected?
Regards;
Hi Thaps,
You are seriously looking for every single possible reason to worry yourself. Don’t do that my friend. Blood type has nothing to do with antibody production. You have the universal donor blood type. Pleae donate blood if you can. You will save many lives.
rgds
Dr Tan
thanks doc .. you have really helped me alot!
Hi weilong,
You are welcome.
rgds
Dr Tan
Hi Dr Tan,
I think what u are doing on yr website Is amazing.
Thank u for taking the time to help those who
Are scared n worried.
Here is my problem n I hope u can help. I
Had unprotected vaginal/anal sex w a sex worker
While very drunk abt 3 weeks ago. I honestly
Dont remember much at all.
I got a urine test for bacterial STD after 1 week
After exposure. I was giving 1 dose of antibiotics
On that day. Up till then there was discomfort
On my genitals. I peed frequently but there was no pain.
A week later test results came back n I was negative
For bacterial STD. However I still have discomfort
On my genitals n still pee frequently. The doctor I saw
Says not to worry as there could be some minor
Bacteria. He says I don’t need medication n that
To see u after 4 weeks for a blood test for viral
And HIV.
I’m worried. What are my chances of catching
Other STD n HIV? And what test after 4 weeks
Is accurate enough to determine that?
I plan to see u about this and for my test.
Hi Ks,
Thank you for your kind words. Unprotected anal sex is a high risk sex act for contracting HIV. When I say high risk I mean in the region of 0.1% presuming that your partner has HIV. At 4 weeks you can opt for a P24 test or a PCR test. There are many possible causes of your symptoms that may or may not be STD related. But you certainly need some tests (urine as well as urethral swabs) to attain a proper diagnosis so that adequate treatment can be given.
rgds
Dr Tan
Dr Tan,
Thank u for your reply.
It’s still slightly uncomfortable but manageable.
Is the best to wait for 4 weeks before coming to see
You for all the tests?
Also I feel a bit of a flu today… Should I be worried?
I know the odds are in my favor but I am still paranoid.
Hi Ks,
4 weeks is best but come earlier if you develop more symptoms.
rgds
Dr Tan
Dr Tan,
I had vaginal intercourse with 3 sex worker on 19 Oct, 21 Oct and 5 Nov 2011. Condom were used in all 3 intercourse. As i am not circumcised, i fear that fluid from the vagina may come in contact with the foreskin as i did not wash up right after the intercourse. How shall i proceed with the testing?
Hi Roy,
Your risk is not high taking into account that you used a condom. Since your last exposure was on 5th November, you should get a HIV antibody test on 5th December 2011 and again on 5th February 2012.
rgds
Dr Tan
Dr Tan,
I always had some rashes on my scrotum, does this increase my risk? It looked like dried blood spots.
Hi Roy,
I’m afraid unless I can see the rashes, this is an impossible question to answer. If the rashes compromise the skin barrier then yes, it does increase your risk. e.g. Herpes and Syphilis.
rgds
Dr Tan
I think its Angiokeratoma, had it since 20′s, no sores and it runs along the artilery…
Hi Roy,
It is best not to self diagnose. See a doctor and find out for sure what it is. But if you are right and it really is an Angiokeratoma then it does not increase your risk of HIV.
rgds
Dr Tan
Dear doc,
I had unprotected sex with a female sex worker about 5 weeks ago. At 25 days I had an RNA-PCR test. It was a Roche cobas ampliprep/cobas taqman hiv-1 test version 2.0 if that makes any difference. It came back HIV-1 RNA not detected, and the analytical range of this test is 20-10,000,000 copies/ML.
I note that you say that these sort of tests are 100% accurate at this time, however I have seen other sites where they claim that they may not be and followup tests are required. DO these sites say this because of the chances of a false positive with the RNA or are there other reasons I am not aware of? How confident can I be with my negative result?
Hi David,
The story with HIV RNA PCR test is a long and complicated one. I was actually just about to start writing a blog entry on it. The HIV RNA PCR’s primary use is to determine the Viral Load in HIV positive patients. It is useful in the initial diagnosis of HIV in very early infection where the ELISA is frequently negative or in cases of an indeterminate Western Blot. Because the RNA PCR test does not have as robust evidence as HIV Ab tests and because they are not ‘officially’ designated as HIV screening tests by governmental health bodies, most health professionals are reluctant to stick their neck out and say ‘yes, the HIV RNA PCR test is enough’. Also, there is the concern that there might be a point after seroconversion that the body is able to suppress viral replication to such a low level as to be undetectable by RNA PCR tests and thereby making them false negative. This usually occurs between 10 to 24 weeks post exposure and is known as the HIV viral load set point. This set point varies greatly between individuals. As with anything in medicine, there are now people challenging the ‘set point’ theory. So after all that babbling I can say that at 25 days post exposure, if you were infected with HIV, the amount of virus in your blood would be extremely high. Definitely high enough for a RNA PCR test to pick up. So you can be 100% confident of your negative results.
rgds
Dr Tan
Thanks Doc,
I really appreciate the response.
As a doctor, do you find it strange that the official window period has remained the same for decades? Do you anticipate changes any time soon with the advances in testing? And do these advances in testing bode well for our knowledge about the virus and treatments?
Hi David,
You are welcome. As I have said to many contributors to this forum, there is often a gap between science and policy. The science is a lot easier to understand. Policy is made by politicians who have to consider a lot of other factors before putting it forward. I really hope policy will change soon to reflect the advances in science. It will make the work of us physicians much easier. HIV is easily the most studied infectious disease in the world. There are many exciting advances in treatment, vaccines research and early detection. Just like everyone else I am hoping for that breakthrough that will finally give us control over this dreadful disease.
rgds
Dr Tan
Hi Dr, I’m a herpes type 1 carrier and need your advise on my recent exposure.
I had a unprotected sex with a sex worker while I was drunk .
I know the risk is very high. I had two times of p24 Ag/Ab combo tests on the 21 days and 41 days from expose date . Both tests are negative . As from this forum , I noted that the risk of infected of hiv is increase for STD people.
So, Dr , please advise is the tests are conclusive as told by the lab. Or I still need further testing on 3 months later . I noted u mentioned this p24 Ag/Ab is conclusive at 4 weeks onward.
I’m so stressful now !
Hi John,
P24 combo tests done between 3 and 6 weeks post exposure are conclusive. You do not need another test at 3 months. Stop stressing. You are fine.
rgds
Dr Tan
Hi Dr Tan,
I was tested negative for HIV and syphilis 13 weeks after exposure at the dsc clinic. Are the results conclusive since both are rapid tests? Are rapid syphilis tests 13 weeks after exposure conclusive ? I do not have any physical symptoms…. Very worried. Pls advise.
Hi Worried,
I’m curious why didn’t you clear all your doubts when you got tested at DSC? I’m sure the doctor would have either told you the results are conclusive or told you to return for repeat testing. I find it very curious that you can go to a clinic and get tested and still not know whether you have HIV and Syphilis or not. I’m not chastising you, I’m really interested to know why this happened. I would really appreciate it if you can let me know. As for your question: HIV and Syphilis rapid tests are conclusive at 13 weeks.
rgds
Dr Tan
one of the nurses at the clinic insisted me to do another type of syphilis test that will require two weeks for the results to show. But I asked for the rapid type since its 13 weeks after exposure. I was wondering why the nurse wanted me to do the other type of tests that will take a longer time for the results to show. Any difference between the two tests in terms of accuracy?
Hi Worried,
You really should have cleared all your doubts with the nurse or doctor at DSC. I really do not know which test she was referring to. There are many tests for Syphilis including the rapid test, VDRL, TPHA, swab for dark field microscopy etc etc. I cannot comment on the accuracy when I do not know what test she is referring to.
rgds
Dr Tan
Quick question.. does daily use of valtrex affect hiv window period ? Tested negative at 3, 5, and 12 weeks post exposure
Hi jana bell jb,
No it doesn’t. 12 weeks post exposure is conclusive. You do not have HIV.
rgds
Dr Tan
I’m sorry I posted the same question a few times here! Thank you for your answer! You have helped me to feel so much better about my results.
Does daily use of Valtrex affect the HIV window period or cause false negative results? I tested negative with an antibody test at 3, 5, and 12 weeks. Thank you.
Hi JB,
No it does not. A negative HIV test at 12 weeks is conclusive.
rgds
Dr Tan
Will Valtrex affect the HIV window period? If Valtrex is taken daily and I tested negative at 12 weeks, 5 weeks, and 3 weeks is this accurate with an antibody test?
hi drTan,
he told that to take with in 48 hours of exposure… i have taken that after 3 days only……
i dont know wt the tablet name….
1.will it affect or increases the window period ??
2.do i need further testing???
please help…
Hi ramesh,
There is no such medicine. Even the PEP is taken for 28 days and not only 2 days. Since I do not know what medicine you took I am unable to comment on its effects on the window period and whether or not you require further testing.
rgds
Dr Tan
hi drtan,
2 years before i have taken that table…my last intercourse was 1 year 4 months before at that time i have not taken any tabltes….all the time i used condom as saftey… but while last time after finishing intercourse condom came out from my penise while taking out fom her.and its half inserted in her vigina….so only i scared…..
iam now safe or not doctor…
please help me…….
Hi ramesh,
I do not think that this forum can help you anymore. Please go see your doctor for a formal consultation and HIV test.
rgds
Dr Tan
thanks DrTan,
now only i discussed about this to my doctor… he said that is antibiotic tablet .Amoxicillin is used to treat a wide variety of bacterial infections .it will not affect the window period he said… now after 1 year 4 months we taken
HIV1/2(ab,p24Ag/serum,Elisa) is Non Reactive and also
* western blot test is negative
so you dont have hiv he said…..
Hi ramesh,
First of all I completely agree with your doctor. But more importantly, your friend is telling people that taking Amoxicillin for 2 days can prevent HIV. This message is pernicious to say the least. Please tell him to stop doing that before he gets anyone else into trouble.
rgds
Dr Tan
Drtan,
sorry for disturb u again…. lot of things happened around me was too confused me… and it has killing me for these days… after consulting with u and my family doctor i was cleared…and also my family Dr told me to forget about and move on…and no need for further Hiv test.
Hi ramesh,
I am glad you came to the realisation. I wish you a happy and healthy life.
rgds
Dr Tan
Thanks Drtan,
i warned my friend doctor… he told me that he given me for not affecting genital infections urinary infections…
its my misunderstanding doctor….sorry for that…. forgive me…
you are really helpful for the peoples who are mentally affected… like me….
Hi ramesh,
I’m glad that was only a misunderstanding. I wish you well for the future.
rgds
Dr Tan
Dear Dr, if coated tongue(oral thrush) is an initial symptom of HIV, how long it persists? Because I am experiencing that from my 1st week of exposure to till date..now 3months and 20days completed from the exposure..is the ARS can last long like this? Please clear my doubt..I am really freaked out..I am really scared to go for next test..my only faith is your last comments that is, I have extremely low chances of getting HIV…thank u so much in advance…
Hi Dev,
You cannot assume that your ‘coated tongue’ is due to oral thrush. See a doctor and determine if you truly have oral thrush or not. You are jumping to conclusions and scaring yourself. Since its already been 3 months from your exposure the best thing you can do is just go get tested and put this behind you.
rgds
Dr Tan
hi doc,
like i told before in my earlier queries that i have been tested negative after 3.5 months by rapid antibody finger prick test …….and i have been told for a retest after 6 months as per indian government policies and standards …
i have read that immunosuppression drugs are used after organ transplantations so that the body immune system does not counter attack the newly received organ from some other person example in the case of liver transplantation ….so if a person is hiv infected and is using these drugs he may not produce detectable antibodies till 3 months because of the weakened immune system. because of which he might test hiv negative ….. and the antibodies may be produced after 3 months which are detected in hiv testing ….
i had done hair transplantation two years back in which my own natural hair was used …. i am using Finasteride tablets since then ….. which according to my internet study is “a synthetic antiandrogen that inhibits type II 5-alpha reductase, the enzyme that converts testosterone to dihydrotestosterone (DHT). Finasteride is approved for the treatment of benign prostatic hyperplasia (BPH) and male pattern baldness (MPB)”…. in general this drug is used to prevent hair fall and induce regrowth …..
my doubt is whether finastride is a immunosuppression drug??? (because of which i tested negative after 3 months) ….. though i have read everywhere that it is not so …. and immunosuppression drugs are used only when organs are donated from one person to another …. whereas mine was just a hair transplantation in which my own hair was used …. am i getting scared without reason????
please advice doctor,
thanks and regards ….
Hi fromindia,
This is a classic example for partial information being more destructive than no information at all. Finateride is NOT an immunosuppression drug. Stop finding reasons to scare yourself.
rgds
Dr Tan
thank u doc for clearing my doubt ..
regards from india ….
what is the accuracy of an HIV DNA PCR test at around 39 days combined with a Antibody test?
Hi Curious…,
100%.
rgds
Dr Tan
Hi Drtan,
sorry for disturb u again…. lot of things happened around me was too confused me… and it has killing me for these days… after consulting with u and my family doctor i was cleared…and also my family Dr told me to forget about and move on…because antibiotic tablet .Amoxicillin is used to treat a wide variety of bacterial infections .it will not affect the window period he said and no need for further Hiv test.
hello Dr,
1. will window period varies from person to person? if it is how long?
2. taking antibiotic will affect the window period?
3. all round the world maximum window period is how long ?
Hi from india,
1. The window period does not vary. What varies from person to person is the initiation of seroconversion. 2. No. 3. This depends on what test is used.
rgds
Dr Tan
hello DRTAN,
1.The Development of Hiv antibodies in blood serum as a result of infection takes how long?
is it with in 3 months of window period or more than that?
Hi from india,
It is within 3 months unless the patient is severely immunocompromised like during chemotherapy.
rgds
Dr Tan
Hi dr tan
i need some second opinion
On 5/11/11,i take the hiv test using the 3rd generation ELISA.it was the 95th day afer the 1st day exposure and test result come out negative.
1.am i 100% negative?
2.Do i need do another hiv test?
Hi very worried person,
You are 100% negative. You do not need another test.
rgds
Dr Tan
TQ dr tan
Hi very worried person,
You are welcome.
rgds
Dr Tan
Dear doc,
I want to ask, having an insertive anal intercourse (being the top) once does it means 100% hiv transmission? Plus, if i may quote from your previous comments, ”A HIV test at 4 weeks is >90% accurate even for the more primitive tests.” What did u mean by that?
Hi Luke,
No. Insertive anal sex has a risk of about 1%. I mean even for 1st generation tests, the accuracy at 4 weeks is very good.
rgds
Dr Tan
I see. How about frottage or dipping (stimualtion of the penis by rubbing on genitals, and maybe slight penetration, kinda like poking around) on the anal? what is your point of view in this 2 ways of could be possible hiv transmission?
Hi Luke,
It is impossible to have good quality scientific studies to determine the risk of every possible permutation and combination of exposures. It is also very unhelpful. Let me ask you: what is the difference if the risk is 1 in 100 or 1 in 1 million? The fact is there is a risk. Are you going to engage in these activities if the risk is lower than let’s say 1 in 100,000? or maybe 1 in 10,000? Is there a magic number at which you will actually take the risk? Of course not. So there is only 1 question to ask: Is there a risk or is there no risk? In these 2 situations, obviously there is a risk.
rgds
Dr Tan
hi doctor,
HIV1&2(P24Ag/Ab,Serum/Elisa) for this test what is the window period?
wt type of test is this?
Hi from india,
This test is best done at 4 weeks. It is an Antigen and Antibody test.
rgds
Dr Tan
Hello doctor,
After my exposure i have taken an antibiotic tablet doctor. in the 8 months of my post exposure i did 1.HIV1&2(P24Ag/Ab,Serum/Elisa) – non reactive.
2. Hbsab- non reactive.
3. RPR(VDRL)-non reactive.
4. Hepatitis C – reactive.
above these test i got Hepatitis C virus….
*do i need another test for Hiv?
*iam free from HIV or not?
Hi from india,
You said you had a HIV test that was non-reactive 8 months post exposure? In that case you are free of HIV and do not need another test.
rgds
Dr Tan
hello Doctor,
yes i did the test on 8 months post exposure.
1.HIV1&2(P24Ag/Ab,Serum/Elisa)- non reactive.
2.now one year completed again i tested HIV1&2(P24Ag/Ab,Serum/Elisa)- non reactive.
3.will smoking and drinking affects the window period?
4.there is any chance for me to get positive?
can i forget about this and continue my normal life….
Hi from india,
You do not have HIV. Smoking and drinking will not affect the window period. Please forget about this and move on with your life.
rgds
Dr Tan
HI Doctor,
Thanks a lot… u are really helpful to others…
Hi india,
You are welcome.
rgds
Dr Tan
dr
i am very confused -too many different views on the internet
could you please assist me with the following questions –
hiv – at what point is a combo hiv test 100% accurate? 3 weeks or 4 weeks?
herpes – can herpes be tested for in blood? i have seen websites offering herpes blood tests without any symptoms – type 1 and 2 – are they any good? since there is no cure available for herpes are there any benefits in being tested? i have read herpes can be passed on even if a condom is used – so what is the benefit of being tested?
genital warts – i have read of tests which test for 20 subtypes of the warts virus without any visible warts- again any good? any benefits as again i have read that warts can be passed even if a condom is used? is there any way of getting rid of the virus before warts become visible?
what would be the primary benefits of the herpes and warts tests?
thank you
Hi Confused,
HIV – 4 weeks. Herpes – Yes. But you should only have Herpes TSST (Type Sepcific Serologic Testing). I cannot comment on web based test but I would personally be rather sceptical. You are right. I personally tell all my patients that testing for Herpes is purely academic. In other words, it makes no difference if the test is positive or negative. There is no cure and there is no way to 100% prevent transmission to your partners. Some patients however are keen to go on Herpes suppressive therapy which can reduce the risk of transmission. Warts – There is no way to test for HPV in men. In women, the HPV test only tests for the presence of high risk cancer causing subtypes of HPV. There is no way to treat HPV before warts become visible. Vaccination provides good protection and might even help fight off existing HPV infections by boosting the body’s antibody response to HPV.
The primary reason for Herpes testing is when the clinical diagnosis is in doubt. The primary reason to test for high risk cancer causing HPV in women is to monitor for pre-cancer of the cervix.
rgds
Dr Tan
thank you for your reply.
i wish to clarify your response re the warts test -i assume that a vaginal swab is taken from women in order to test – not urine or blood – otherwise there would appear to be no logical reason as to why men cannot also be tested –
i have telephoned the clinic i was proposing to visit – their website is samedaydoctor.co.uk – please visit their website in order to get a better idea of their services – they have confirmed that they can test for warts in men – as have other clinics – i am not in any way questioning your advice – i am simply confused and am keen to avoid infecting others unnecessarily – they have said they take a swab and do a dna test –
you will be aware that clinics in the UK are subject to strict regulation – this is not the only clinic who offer the warts test for men – am i overlooking something?
i repeat i am not questioing the advice you have given – i seek clarification as do not wish to infect others – i also do not wish to spend money unnecessarily
please help
thank you
Hi Confused,
You are right except for one technical point. It is a cervical swab not a vaginal swab. The only time I ever do a HPV tests for men is when they have a history of receptive anal sex. Then I do an anal swab for HPV testing. Again this is a test for cancer causing HPV and not a ‘test for warts’ per se. I am really unaware of any tests that can test for all HPV strains that can possibly cause warts. Furthermore, I do not know what they are going to swab. And if they swab a big area of skin, how is it possible to determine which part actually carries the HPV virus? Perhaps they know something I do not know. I would be extremely grateful if you can share with me and the forum how the test is conducted and the results.
rgds
Dr Tan
as always, a gentlemanly response.
i am heterosexual – i will doublecheck with the clinic as to where they will take a swab – i will doublecheck whether the test is for homosexual men only -
one of the clinics say they can test for over 30 subtypes of the virus –
- the websites contain only limited information and it is very difficult to get to speak to a doctor over the phone – if i do go ahead with the test (subject to what the test involves) i will certainly keep you updated
having read some of the comments above i noticed one comment that suggested that circumcised men have a reduced risk of being infected with hiv – is this correct?
i also wish to ask whether washing immediately after sex reduces the risk of transmission of various stds
does the woman being on top increase the chances of transmission?
apologies if these are stupid questions
thank you
Hi Confused,
Thank you for the compliment and thank you for sharing. Circumcised men have a 60% reduced risk of contracting HIV. This is because the Langerhan cells found on the inner surface of the foreskin are removed. Langerhan cells literally act like HIV magnets. Circumcision is such an effective method of HIV prevention that WHO wanted to use it in Africa as part of their HIV prevention strategy. This plan was abandoned due to obvious logistical challenges. There has been no evidence to suggest washing helps in anyway for both HIV as well as STD prevention. Similiarly, sexual position also has not been found to make any statistically significant difference. What does make a difference is the type of sex act i.e. oral sex, vaginal sex, anal sex. Your questions are not stupid at all. They are very relevant and I’m sure also very useful to other users of this forum.
rgds
Dr Tan
i have contacted the clinic – and have decided not to test for hpv/herpes – you were right!
thank you for your advice/comments
i have another question – if i may – please
as a man does receiving oral sex have the same, more or less risk of contracting herpes and hpv as vaginal sex
thank you
Hi Confused,
Lets look at both scenarios. 1. Mr. X being the insertive partner. i.e. his partner using her mouth on Mr. X. Risk of Herpes – similiar to vaginal sex. Risk of HPV – lower. 2. Mr. X being the receptive partner i.e. Mr. X using his mouth on his partner. Risk of Herpes – Similiar to vaginal sex. Risk of HPV – High. And this can cause throat cancer. There has been a lot of studies on throat cancer in men after they go down on women with HPV.
rgds
Dr Tan
Hi DR tan
Iam little bit scared…
why i am scaring means..now nearly 1yearand 5 months completed Doctor..
at the 4 to 5th month i got fever with loose motion.i recovered on that day its..and by 7th month i got inflammation in my chest ,shoulder and hands….
and also Gastric and digestion problem….. after 2 months later my doctor diagonised told me that iam having stomach ulcer.. he said due Gastric ulcer only ur having digestion problem,heart burn, hand and back shoulder inflammation… its not related to HIV…
And by 1 year and 3 months we take Hiv1 and 2(AB/P24,serum/Elisa) and western blot tests both are negative only…
In my western blot result
1 under nine sub types like P24,P55,P51…etc all are Not Detected
2 Not Detected
Comments:
Western blot is negative for both 1 and 2
Sample Type:
Serum.
INTERPRETATION:
1 and 2 negative is reported when only control bands or control band with P55/P51 is detected.
this the result doctor….in interpretation they mention control band with P55/P51…but P55 and p51 is not detected in my above result. so only i little confused..its related to my result??
But My Family doctor told me that its not applied for u….Interpretation means the process wt they doing its for their reference not for u he said…
my result was 100% ok doctor??
please help Dr….
Hi ramesh,
Please go and seek professional psychiatric help. This forum cannot help you anymore.
rgds
Dr Tan
Hi Drtan,
sorry doctor… u and my doctor telling the same thing……he also warned me that he will send to psychiatric if i was doing like this… doctor i was mentally affected….. i konw that…
iam going to get married so only i scared doctor….
Hi ramesh,
Please follow your doctor’s advice and go see a psychiatrist.
rgds
Dr Tan
Hi DrTan,
Today i met an psychiatric doctor…
he said please stop worring first..u dont have HIV..
u should believe in ur test results and what ur doctor says to u.please dont get confused with ur results.
As long as you do not believe the answer, you will keep on worrying. Its over.
You made a mistake and you have paid for it in terms of worry and tensions.
I am sure you have learnt your lesson and will take care not to expose yourself to infection again.
Relax, accept that you made a mistake and were lucky. You are OK.
Try to get married as soon as possible and enjoy ur new life he said….
Thanks a lot to u and my family doctor…
Because of both of ur advice today i came to the realisation…
I am going to get married doctor.
soon i will mail u my marriage invitation.
Thanks a lot……
ur really great doctor….
Hi ramesh,
I am glad you are OK. May you have a blessed wedding and a blissful marriage.
rgds
Dr Tan
hi doc tan,
thanks for clearing the doubt about finasteride tablets ….
i was also using OXCARBAZEPINE tablets for 2 months after exposure … is OXCARBAZEPINE a type of immunosuppressant drug ?
thanks and regards …
Hi fromindia,
I would suggest you ask the doctor who prescribed you this medicine and for all future medicines you want clarification on.
rgds
Dr Tan
Dear Dr,
What is axsym test kit. My test done with this device.combo test.Elisa HIV 1/2 ,HBs Ag, Anti HCV..test done at 2 & 3 month possible exposure.. all negative. How about this device? what tests are HBs Ag & Anti HCV.?
Hi Doubt,
I have never heard of this test kit. I therefore cannot comment on its accuracy. HBa Ag tests for Hepatitis B infection. Anti HCV tests for Hepatitis C infection. Please do not conduct tests on yourself when you do not even know what its for. This is a very dangerous thing to do. If you do not even know what the tests are for how can you know the implications of a positive or negative results. This really illustrates the dangers and limitations of home testing. Please see your doctor and have proper tests done.
rgds
Dr Tan
Dear Dr,
It was not done at home. actually this was done from a clinic as part of medical fitnes test for abroad work. i just remember they told me about that instrument.
Hi Doubt,
I see. My apologies. I really am not familiar with the test kit and therefore cannot comment on its accuracy. As for the other tests, I’m sure if they were abnormal in any way, the doctor would have brought it up to your attention.
rgds
Dr Tan
Dear Dr,
I would like to give some links about that kit. My case it was done from India and then from abroad -both government approved medical fitnes test center.(it might be different kit, which i dont know), both includes ELISA. I did test at 2 month (frm India) & after 100th day frm abroad. both were fit.
Links-
1.http://www.hivtestingconference.org/PDF/Presentations/Claessens.pdf
2. http://www.cdc.gov/nchs/data/nhanes/nhanes_01_02/l06_b_met_homocysteine_Axsym.pdf
3.http://en.allexperts.com/q/AIDS-339/2009/3/Question-testing-window-testing-1.htm
Thanks for your time and it would be an extended support if you could interpret some thing from that link. It seems the above kit is a 4th gen test kit.
Hi Doubt,
Thank you for sharing the links. I really appreciate people such as yourself who contribute such information to the forum. It helps all of us learn more about HIV and hopefully reduce the fear and stigmatisation. I have gone through your links and have done some of my own research. The AxSYM system by Abbott is an immunochemical automated analyzer. It is bascially a machine that can analyze whatever we want it to analyze. Depending on the operator, it can either just run a HIV antibody test or a combined Antigen/Antibody test. Data on its sensitivity and specificity is very good. However, it does have a significant false positive rate and just like all other HIV screening tests, require a Western Blot confirmation if positive. In conclusion, your test with this system at 100 days post exposure is conclusive. You do not have HIV and you do not require anymore repeat testing. Thank you again for sharing the information.
rgds
Dr Tan
hello dr.tan i find your website very insightful and informative.. here’s my question for you. I’ve read that a person with a undetectable viral load and is under treatment can test hiv negative on a antibody test.. is that true?? would a oral or finger prick antibody test miss a person thats under treatment. please answer if you could
Hi laura,
Thank you for the compliment. As for your question: No that is NOT true. A person with an undetectable viral load will test negative on a PCR test but the antibody test will always test positive given that the window period has been met.
rgds
Dr Tan
Greetings from the States. I’ve just read that only potential case of delayed HIV seroconversion involved concurrent acute hepatitis C infection… Is that still true with modern hiv antibody test? and what generation are the orasure antibody test? I was given one a few months ago. now all of a sudden read where people was given duo-his antibody/antigens test. i was just given the antibody test. was that test sufficient and why most testing sites in america dont give the duo test?
Hi Mike,
Greeting from Singapore. HIV tests that are FDA approved undergo testing to monitor their sensitivity in the presence of ‘Interfering Substances and Unrelated Medical Conditions’. You will be able to find this information easily in their product inserts. These tests are extremely reliable even in the presence of other medical conditions like Hepatitis C. The Oraquick test is 3rd gen. The Duo test is actually a test for both HIV antigen (P24) as well as the antibody. What you had was an antibody test. The antigen portion of the so-called Duo test does not have as rigorous a scientific backing as the antibody test. It is therefore frowned upon by a sizable portion of the medical community. Personally, I would also rather patients undergo antibody tests at 3 months rather than relying on a duo test at 4 weeks. As for you, I assume you are suffering from Hepatitis C and you are worried your HIV test done a few months ago was not accurate because of your Hepatitis C status. My only question for you is how long after exposure was the HIV test done? If it was more than 3 months than you are fine.
rgds
Dr Tan
Dear Dr:
Hello, I have a posible exposure to hiv 4 months ago, I have done the rapid test 3 teams, ( one each month) and in all the result is negative, but i dont know if it is paranoia but i keep feeling like I have something, eventhough I haven have feber or nothing.. I bght the test from labpro, nexus laboratories… EZ TRUST
Hi DANI,
Since you had a negative test for HIV 3 months post exposure, then we can conclude that you do not have HIV. If you have symptoms that are still bothering you then my best advice for you is to see your doctor. Not everything thing is due to HIV.
rgds
Dr Tan
Hi Dr Tan,
I’ve unprotected sex with a sex worker in china about 10 days ago. Today, i’m having a headache, and i’ve found some small pimples like thing on my penis. i’m quite concerned about it. Do symptoms shows up in 10 days? when should i go down to your clinic for a test to be sure? and also is there any cure if i’ve really contracted the disease?
Hi john,
If it is HIV you are worried about then let me say that 10 days is much too short a time for ARS symptoms to appear. However, these ‘pimples’ you have could be indicative of other STDs. For HIV testing, its best to come at 28 days post exposure. Unless you want to do the PCR test then you should come immediately. You should also have your ‘pimples’ checked to make sure they are not symptoms of another STD. There is currently no cure for HIV.
rgds
Dr Tan
Dear Dr.
I had protected sex on August 31,2010 after that after three days i got a severe stomach ache. Then i had another protected oral sex on End of December 2010 or first week of Jan, 2011. But exact date i do not know.
After that i got severe anxiety and had HIV Duo test (Roche combo test) at Feb 7, 2011 which come with negative but still i was wondering about the result and accuracy of the test. So i had another test at June 11, 2011 which i guess third generation ELISA test.
Please give me your suggestion i am really struggling and suffering with phobia severally. In some website and organisation recommend to check at six months. If i calculate i checked at first week of the six months so it enough. Whether i have go for retest. Please explain what is the exact window period i am confused with lot of people.
Hi Kannan,
Your test on June 11 2011 is conclusive of the fact that you do not have HIV. It sounds to me like you need to speak to a counsellor. I suggest you contact your local counselling hotline and speak to a counsellor.
rgds
Dr Tan
Hi
why i need a counseling? what kind of counseling i should go for it? what is the problem for me? Please give me your expert suggestion? I am really in high stress.
Hi Kannan,
I suggested that you need counselling because from your posts, you sound like you are much too stressed about HIV than you need to be. You do not have a problem except for the fact that you are worrying too much . I am worried that if you continue worrying like this, you may end up needing psychological treatment. Before that happens, it helps to speak to a trained counsellor to get your stress and worry under control.
rgds
Dr Tan
dr i have unprotec sex with a girl 3 month and wat test i nid?how long can 100%clear it ? if i test today any methhod also can or wat ?i come from jb pls help me dr !thank!
Hi xiaogui,
Greeting from Singapore to JB. Since it has already been 3 months since your exposure, the only test you need is a HIV antibody test. This can be done with a rapid test. The result will be 100% conclusive. You can come to our clinic at Robertson Walk for this test. It costs $50. Tel: 62387810
rgds
Dr Tan
i had unprotected oral sex (get sucked) with hiv+ guy, i had taken hiv duo ultra IV GENERATION blood test at 23 days post exposure the results came like that, HIV-1 & HIV-2 – NON REACTIVE, AND P24 ANTIGEN – NOT DETECTED IS THIS CONCLUSIVE
Hi kk sharma,
Although many studies and statistics show that a DUO test beyond 3 weeks post exposure (like in your case) is as good as conclusive, personally, I would rather wait till 4 weeks to rely on a DUO test. My professional advice to you is 1. the test you did is at least 99.9% accurate. 2. you will still benefit from a repeat test at 4 weeks.
rgds
Dr Tan
thanks doctor, i will repeat my test after 4 weeks
regards
Hi kk sharma,
You are welcome. I wish you well.
rgds
Dr Tan
dear dr. thx for reply,me frm india i m so scared not sleeping properly since 25 days, i m having 2 small kid, worrying that i m going to die,that u told the test is 99.9% accurate, it is really accurate na, pls dr. pls clear my doubt
Hi kk sharma,
I do not know what else to tell you except that the test is 99.9% accurate. You must try to calm down. The statistics are in your favor.
rgds
Dr Tan
sir, what is elisa and after how many days it was best accurate, bcoz of my worry can i go for elisa or some other test u suggest me sir.bcoz my family doctor told me after 3 month test is final, but i cant wait for 3 month even still 1 is going to complete.
Hi kk sharma,
Do not waste your time and money worrying about other tests at this point. The 3 months will past sooner than you think. Relax, you will be OK.
rgds
Dr Tan
thanks, dear dr. you are awesome, thanks for relaxing me,
lots of regards
Hi kk sharma,
You are welcome. Thank you for your kind words.
rgds
Dr Tan
Dr. Tan I was wondering what my chances are of contracting HIV. I had unprotected sex twice for about 30 minutes each time with a guy of unknown status. He did not ejaculate inside me.
Hi Curious,
Can I assume you are a woman and you had vaginal sex? In that case, assuming he is HIV positive, your risk is approximately 0.1%. If you had anal sex then your risk is closer to 1%. Aside from HIV, you are also at risk of other STDs like Chlamydia. Chlamydia can infect a woman and cause not symptoms. If left untreated, it can cause severe infections of the pelvis and may even lead to infertility. It is also much much more common and contagious than HIV. So, although I absolutely understand and empathise that HIV is your primary concern right now, I still have to advise you that from a medical stand point, you also really need to screen for the other STDs. If you are a man who had sex with another man please re-post the question and let me know because the advice will be different.
rgds
Dr Tan
Yes, I am a woman. Thank you very much for your advice!
Hi Ms. Curious,
You are welcome. I wish you well. Please stay safe.
rgds
Dr Tan
Hi Dr Tan
Recently I did a blood test (ELISA), the result is non-reactive. Is it conclusive after 8 weeks of exposure with protected sex?
Thanks
Hi Peter,
An ELISA test cannot be presumed to be conclusive at 8 weeks post exposure. Please repeat the test after 12 weeks.
rgds
Dr Tan
D ear Dr, I have a question, the muscle twiching all over the body could be a symptom of Acute HIV infection? I can remember you r said that symptoms alone can’t judge HIV..it just to clear my doubt..because I am experiencing this from last 3months very severly.. Have u seen any HIV patient this kind of symptoms? Thank u very much.
Hi Dev,
It is impossible to tell if someone has HIV or not based on symptoms. Even if I had or had not seen patients with these symptoms it will either just give you unecessary worry or a false sense of security. So I would rather not comment on the significance of symptoms. You too should not put any significance to your symptoms.
rgds
Dr Tan
Dr.
First, I commend you for the good work you are doing here. The peace of mind you are providing others is a gift that you deserve vast treasures for. You have inspired me to do more good works in my own life, provided I overcome the anxiety and fear I now feel.
4 weeks ago today I had an encounter with a CSW. I had oral and vaginal sex with a condom that I can confirm was intact at the end of the encounter. I have been tortured by anxiety, guilt (I am a married man) and disappointment with myself.
I have had the following tests over the last 4 weeks:
7 days: HIV blood test–Negative
10 days: HIV DNA test–Negative
12 days: Oralquick test–Negative
12 days: p24 Antigen test–Negative
16 days: PCR RNA test–Negative
20 days: Oralquick test–Negative
I am now waiting for results from another DNA test, antibody test, and P24 antigen test that was taken at 26 days. I understand that many of these tests are inconclusive, but can I be confident with the tests I’ve already had? I admit to being a bit of a hypochondriac and prone to extreme anxiety. I simply don’t want to give my beautiful wife a disease because of my moral failings and bad decision making. I have convinced myself I have all sorts of symptoms and I so want to put this behind me.
Thank you again for your dedication, kindness, and frank response.
Hi Worriedlikeeveryone,
Nice nick. Thank you for your kind words. The RNA PCR test you did on day 16 is conclusive. You do not have HIV. This is beyond the shadow of a doubt. I am surprised your doctors let you go through all these tests which are extremely random. I cannot make heads or tails on why the tests were done when they were done. BUT, the gem in the entire list you gave me was the PCR RNA at day 16. That test really saved the situation. You do NOT have HIV. Please forget about this. Now, I really must advise you to get yourself tested for all the other STDs especially Chlamydia and Gonorrhea. It is much more likely that you have caught one of these rather than HIV. You do not want your wife to get these diseases also I’m sure. So please go get yourself tested for these. As for HIV, you escaped the lion’s den this time. From the tone of your post I’m sure there will not be a next time.
rgds
Dr Tan
Hi Doctor,
Would you recommend a DNA PCR test? And how long should you wait to take this? Thanks!!!!
Hi Kate
I am currently handling queries from many patients. I am in the process of re-directing this to a forum to allow better follow up of individual cases and it also makes it easier for people like yourself to find the relevant information that you need. As for your question, I really am unable to remember the details. Some generic information. HIV RNA PCR is 100% accurate from 10 days to 8 weeks post exposure. HIV DNA PCR is 100% accurate from 28 days post exposure.
rgds
Dr Tan
Hi doctor,
What if I had sex with a sex worker and caught flu together with fever 10 days later. Is it possible that I contracted HIV? we engaged in protected virginal sex and unprotected anal sex
I also had red spots on my genital 4 days pior to that intercourse. I’m worried sick!
Hi Lim,
It is not possible for me to comment on the red spots and how they can affect your risk unless I see them and have a firm diagnosis. Worrying will not help you at this point. Just focus on getting the HIV test done. If you want speedier results you can consider getting the RNA PCR test.
rgds
Dr Tan
Thank you for your prompt reply. How about the flu like symptoms? They lasted for about a week an I had this constant bad cough which last for almost a fortnight. Is the chances of mencontracring HIV high due to my intercourse with a sex worker?
Hi Lim,
Symptoms are very unhelpful in diagnosing HIV. Please refer to my post: http://www.drtanandpartners.com/hiv-symptoms-%e2%80%93-early-symptoms-of-hiv/. Apologies but I really cannot recall the details of your exposure. Please remind me. There will be much better follow up of individual cases once I convert this into a forum format.
rgds
Dr Tan
Hi Lim,
Unprotected anal sex carries a significant risk of contracting HIV is your partner was HIV positive. However, symptoms at 10 days post exposure are unlikely to be due to HIV. You definitely should get a HIV test done at 1 month and again at 3 months post exposure.
rgds
Dr Tan
HI, I had an open wound during a message at Phuket, Thailand.
I am paranoid because she offered me handjob. I declined the offer. What makes me keep thinking is that what if any semen left over on her hand from her previous costumer touched my wound. Does that post a risk? I was(HIV 1/2 Rapid test- blood pricked)tested negative at the 4th month from that incident. Shuld I need to retest at 6th month? Does Thailand strain CRF01_AE subtype causes the accuracy to fall? Does Rapid test is reliable for all subtype? Is is 100% guaranteed?
Is it 100% guaranteed after 3 month for this type of subtype?
Hi david rio,
This should not even be of concern to you. You were not exposed to HIV. Your worries are completely unnecessary.
rgds
Dr Tan
Hi Yves,
I think this is a repeat post from you. Apologies, I am currently attending the Asia Pacific Congress on Sexual Medicine so my responses will not be as speedy as normal. Just to recap my answer to your other post: Your worries are completely unnecessary. Your ‘exposure’ was not even an exposure in the first place.
rgds
Dr Tan
Hi dr. Just wanted to know what’s the ag p24 + anticorps anti hiv (1+2) test that i did it 38 post exposure and came out negative? I was told its conclusive. (i think its the duo test)
Hi Yves,
I think this is a repeat post from you. Apologies, I am currently attending the Asia Pacific Congress on Sexual Medicine so my responses will not be as speedy as normal. Just to recap my answer to your other post: A P24 Anitgen Antibody test is conclusive at 38 days post exposure. You can stop worrying.
rgds
Dr Tan
HI, I had an open wound during a message at Phuket, Thailand.
I am paranoid because she offered me handjob. I declined the offer. What makes me keep thinking is that what if any semen left over on her hand from her previous costumer touched my wound. Does that post a risk? I was(HIV 1/2 Rapid test- blood pricked)tested negative at the 4th month from that incident. Shuld I need to retest at 6th month? Does Thailand strain CRF01_AE subtype causes the accuracy to fall? Does Rapid test is reliable for all subtype? Is it 100% guaranteed after 3 month for this type of subtype?
Hi david rio,
You are worried because you think the masseuse in Thailand had HIV infected semen on her hand while giving you a non-sexual massage and could have touched your open wound and gave you HIV? It is impossible to get HIV this way. You did not even require the HIV test at 4 months post exposure which was expectedly negative. Please forget this and move on.
rgds
Dr Tan
Dr.
I had protected anal (both giving and recieving), mutual rimming and oral. What is my risk with oral?
I tested at 4 weeks Elisa (negative) and at 8 weeks (oraquick rapid advance). My doctor said that this is conclusive that I do not have HIV, do I need to retest at 13 weeks? Also, how many times have you seen an 8 week negative test turn positive?
Also, I contacted the other guy and he said he tested negative on sept 15th and November 5th, is that also a good indicator along with my negative 4 and 8 week test?
Hi So worried,
You did not give me the date of your exposure so it is impossible for me to comment.
rgds
Dr Tan
Hi So worries,
You should be more worried about your risk with anal sex rather than oral sex. Even if the anal sex was protected. A Oraquick test at 8 weeks cannot be presumed to be conclusive. Please retest at 12 weeks. I have never seen anyone test negative at 8 weeks and positive at 12 weeks.
rgds
Dr Tan
My exposure was on sept 17th. You say i should be more worried with anal, eventhough it was protected? Is there a risk with oral? I have had symptoms since 3/4 days after exposure, till now that would make it 2 months. Intermittent diarrhea, a whitish tongue and a slight sore throat/ more like a gagging sensation. No fever, night sweats. Does this sound like seroconversion/ars? Can it last that long? If I took a pcr DNA get at 9 weeks, would that test’ results be conclusive? So in your opinion my 4 and 8 week tests r good indicators of my status?
Hi So worried,
Your symptoms will only cause you to worry. It does not say anything about your HIV status. See a doctor to have your symptoms properly diagnosed. A DNA PCR at 9 weeks is conclusive. A test at 8 weeks is a very good indicator.
rgds
Dr Tan
Dear Dr. Tan:
Would trying on earrings that haven’t been cleaned with alcohol at a store pose HIV risk? My earhole may have had pus and some blood (not wholly sure) while trying the unsterilized earrings. SHould I get tested? Thanks
Hi Neda,
Absolutely not. However, body piercings that are not hygienic can pose other problems like Hepatitis B. However, yours sounds more like a standard infection with Staph. Go see your doctor to have it fixed. You do not need to worry about HIV.
rgds
Dr Tan
HI Dr. Tan:
Thanks for the feedback. But if earrings were tried on before me by an HIV + person who had bloody earholes and left blood on the earring, and I had put them in my earhole which has pus and some blood, wouldn’t there still be a risk?
Thank you
Neda
Hi Neda,
Yes but extremely small as HIV dies quickly upon contact with air. I’m sure if the earrings were dripping with blood you would have noticed.
rgds
Dr Tan
I don’t recall seeing blood but maybe possibly there was invisible blood that i couldn’t see? would you recommend i get tested?
Hi Neda,
If the blood was such a small amount as to be invisible then it is of too small an amount to cause infection. I do not think you need to be tested.
rgds
Dr Tan
Hi Dr. how are you? just wanted to ask what’s the “Ag p24 + Antibody anti HIV (1+2)” test (it searches for antigen & antibody).
I tested negative at 38 days post exposure & the laboratory told me it was conclusive. can i move on with my life?
Thank you.
Hi Yves,
The P24 combo test is exactly that. It tests for the presence of both the HIV antigen as well as antibodies. If you had this test done at 38 days post exposure and it was negative then you certainly are free of HIV and can forget about this whole thing and move on with your life.
rgds
Dr Tan
hi doc ,
i retested after 4 months ten days from exposure at a different government sponsored testing centre ….
it was negative …. the counsellor told that negative testing after 3 months is final and conclusive ……
but when i tested last that is after 3 months ten days of exposure the counsellor told to retest after 6 months …. it was at a different centre ….
both the testing methods are same ….. they used the same rapid antibody testing kits ….
now i am confused …. whom to believe …..
pls advice …
thanks and regards …
Hi fromindia,
Again, why did you not ask the counsellor at the testing site? That was your perfect oppurtunity to clear all your doubts. Please remind me: What was the test kit that they used?
rgds
Dr Tan
hi doc,
the kit they used was SD BIOLINE HIV1/2 3.0 ….
the counsellor told me that they used to tell patients to retest after 6 months earlier but these days the policies have changed and they are suggesting a 3 month window period …..
thanks and regards..
Hi fromindia,
The counsellor’s comments sound extremely sound. Policies have changed in the past few years to reflect a 3 month window period rather than 6 months. This is because modern HIV tests have been found to be conclusive at 3 months post exposure. Since you got tested after 3 months, you really need to trust the results and move on.
rgds
Dr Tan
hi doctor
i have a question for you ,, why cdc said that 97% of people will test postive after 3 months and 3 % will test after 6 months , and what is the factor of delayed hiv to 6 months ?
best regards
Hi scholes,
That is a very good question. As far as I know, all the modern tests for HIV only require a 3 month window period (some even less). I think the CDC has to be ultra-conservative in its recommendations because their statements are read by a wide spectrum of audiences. So they are unable to determine what kind of tests their readers are using. If a person is still using the first generation antibody test then the window period will be 6 months. Furthermore, if a person is on chemotherapy, anti-retroviral treatment or any other treatment that can delay the production of antibodies, the window period will also be extended to 6 months. I think the CDC has to be ultra-conservative and take all these possibilities into account so that they do not mislead any of their readers.
rgds
Dr Tan
thank you doctor
but what do you mean by ” modern tests ” is 3rd and 4th generation ?
Hi scholes,
Yes. That is exactly what I mean by modern tests. 3rd and 4th gen.
rgds
Dr Tan
Dr Tan:
You do an incredible job here responding to people’s questions.
I may be thinking too much…but I had a rapid HIV finger prick test done (I think it was Oraquick or Clearview not sure) in the USA at a public health STD clinic and for some reason I am worried that the nurse reused the lancet on my finger that may have been used immediately prior on someone who tested positive for HIV+ (as it was an STD clinic and I am assuming people who come here to get tested were at high risk for catching STDs). Are lancets and pricking devices reusable? Even if it was reused should I be worried about possible HIV exposure? Thank you
Wishes,
Mona
Hi Mona C.,
Thank you for your kind words. Greetings to the USA from Singapore. All finger prick devices are potentially re-usable. Although I would be shocked beyond words if a country as modern and sophisticated as the USA would be doing such a thing. I am sure the public sexual health clinics in the USA are governed by and abide by the strictest of hygiene and infection control protocols. I wouldn’t think twice about getting a needle in the USA. I think most people would agree with me. Even if the lancet used on you was used on a HIV positive person before you, the risk of contracting HIV from such an exposure is zero. First of all the amount of blood on the lancet is too minute to cause an infection and secondly, the HIV virus ‘dies’ almost immediately upon contact with air. I really think your worries are unfounded.
rgds
Dr Tan
Dear Dr Tan:
Thank you for your prompt response.
That was my thinking–and also I read that most lancets on the market are single-use and retract so they cant be used more than once. So I guess lancets are not able to be reused in clinics even if the nurse accidently picked a used lancet up? Thank you once again.
Hi Mona C.,
You are welcome. I hope you can put away these unecessary worries.
rgds
Dr Tan
Hi Dr Tan:
Just to clarify-the lancet that was used on me was an auto push lancet, where the lancet is activated by a gentle push. I think the needle is then concealed after the prick is made. Are these single use and do they retract permanently after being used once and thus rendered inoperative again? Thanks
Hi Neda,
There are many different brands and makes of lancets. Some actually can be re-used even though they are not designed to. I suggest you contact the practice that did the finger prick for you to clarify.
rgds
Dr Tan
Hello Dr.Tan, Im a frequent visitor to your website, and its quite informative if i might add, I have a question. I had 2 unprotected encounters with a women of unknown status back in 08″ The 1st was in August and the 2nd was in October.. We both got tested in November of 08 which was 3 months after the 1 possible exposure and 3 weeks after the last possible exposure which was in October- Both of our results was negative(ora-sure oral test was given), Then we waited to get tested again in February of 09 which was 6 months since the 1st possible exposure and 3 months after the last possible exposure and my and her two antibody test came back negative(ora-quick finger prick test was given)…So what im asking you is that could our negative antibody test could have been false antibody results since im always reading wait 3 months or more to get tested or might we both had been in our window periods? & we was giving the oral sure and oral quick rapid antibody test. what have change since 08 and 09 in antibody test. since we didnt get the combo test bcuz the testing site didnt have it. Im sorry for the long question, but ur assistance would be greatly appreciated
Hi Robert,
I’m glad you find the site informative. If there is any topic in particular that you want to see please let me know. I know there is all this babble on the internet about window periods being 3 months and 6 months. Some sites even say the window period is 1 year or even 2 years! Do not get confused with all this. The fact remains that the Oraquick test using whole blood (finger prick) at 3 months post exposure is 100% accurate. You and your partner do not have HIV. Celebrate the fact and do not think of it again.
rgds
Dr Tan
thank you for your quick response, here’ another question i have for you which i guess probably been brought up to you a million times, but outside of being on chemotherapy, and drug user of is there any other possible reason for a person to have delayed hiv sero-conversion? i have read that HCV may cause these how true is it?
Hi Robert,
The question to ask is ‘how delayed is delayed?’ The delay has to be significant enough to affect testing accuracy after the 3 month window period. HCV does not cause such a long delay.
rgds
Dr Tan
Dear doctor,
i am going crazy over here. i had a short flu like illness (chills, mild fever, aching legs) that lasted about 6 days, 12 days after unprotected sex with my boyfriend of unknown status 10 weeks ago. now I am 8 months pregnant and i went for an hiv test at the health clinic. it was oraquick and the result was negative 9 weeks post “exposure.” i plan on going for the 3 month test and i’m really feelin like it will be negative also after what you have told others on here. after my 3 month oraquick test can I finally put this behind me? I am just worried that it won’t be conclusive for me since I’m preg.
Hi worriedmama,
There is really no reason for you to be worried. Here’s why: 1. 12 days post exposure is too early for HIV symptoms to appear. 2. An Oraquick test at 9 weeks post exposure is as good as conclusive. 3. Pregnancy will increase the false positive rate rather than affect the sensitivity of HIV tests. You can definitely put this all behind you after the 3 month test.
rgds
Dr Tan
Ok thank you! So no need in worrying about the 6 month window period?
Hi worriedmama,
You definitely do not.
rgds
Dr Tan
Hi Dr Tan!
Last October 15, 2011, I engaged in protected vaginal sex with a CSW. As I completely regret doing such act and have thus been riddled with anxiety and stress, I had antibody tests at the at the 4th and 5th week mark and all were negative. I plan to get tested again next week (at 6 weeks). The doctor at the social hygiene clinic told me i had nothing to fear since her clinic handles the check ups of the CSWs in the said establishment. She further reassured me that they are clean and had no history of HIV. The fact that the encounter was protected, according to her, makes my risk very minimal
With this said, I’d like to ask the following questions:
1.) What is my risk for that particular encounter?
2.) Are my test results encouraging? (I plan to get tested further at the 8 and 12-week mark)
I’ve been worrying my wits out and have been ineffective for the past five weeks. I’ve been ignoring school as a result of anxiety and i don’t wanna throw everything away for what my doctor considers as irrational worrying. Your opinion would surely go a long way. Thanks Dr!
Hi john,
Protected vaginal sex carries arisk somewhere in the region of 1 in 100,000. That is assuming that the CSW had HIV in the first place. It sounds like the risk of the CSW having HIV itself is almost zero. Your test results are extremely encouraging. Negative antibody tests at 5 weeks are very very accurate. Some would even say 100% accurate. Your doctor is absolutely right that your worry is excessive. You need to get your focus back. School is very important.
rgds
Dr Tan
Thanks for the reassurance doc! The world needs more kind people like you
Hi john,
You are welcome. Thank you for your kind words.
rgds
Dr Tan
Hi Dr. Tan,
It’s me again. There’s been an update in my situation and I’d like your advice on it.
On Day 27 post exposure, I went for an oraquick antibody test, the mouth swab one, and the results were negative. I even took home the sample to examine it under clear light to make sure there wasn’t a faint line besides the T. A little paranoid, I know, but I couldn’t help it.
I posted my results, exposure, symptoms (or lack thereof) on ehealthforums.com, and the doctor who answered my question said that the results were accurate and there was no need to doubt the results.
My exposure (to recap):
Unprotected vaginal sex with a prostitute. It lasted 1 to 2 minutes at best.
Symptoms:
Bean-size swollen lymph nodes just above my adams apple, and under my right armpit.
No fever, no rash.
I read on the US CDC website that at 27 days, the results are around 90% accurate.
From your experience, should I go for a re-test at 6 weeks? Would it be necessary? Most people say that the absence of fever is strong evidence against an HIV infection. I’d like that little bit of reassurance, but this series of HIV testing is blowing a hole in my pocket.
Kindly advice Sir.
Many Thanks.
Hi Dan,
First as a word of caution: Do not attempt to read the Oraquick test 40 minutes after the test has been done. Oxidation can cause a faint T line to appear usually after about 12 hours. This will scare you unecessarily. The best and most cost-effective thing for you to do is a rapid HIV test at 3 months post exposure. It is really to give yourself closure more than anything else. My worry is that if you do a tst at 6 weeks, you might catch a cold at 8 weeks and start the cycle of worry all over again.
rgds
Dr Tan
Dr. Tan,
Haha yeah I suppose that would be the case! The entire premise of the HIV incubation period is a cause for a lot of worries.
Nonetheless, at 12 weeks post exposure is far too long. I’ve read at many places that 6 weeks with modern HIV antibody tests is statistically definitive. You’ve advocated this policy as well, from what I’ve gathered after reading the forum posts.
Just for a peace of mind, would you concur that a negative test result at 4 weeks along with a lack of typical ARS symptoms (apart from the lymph nodes mentioned above) is ‘good-enough’? If so, then I will see no reason for further testing!
Thanks once again Sir. Please give me your honest medical opinion!
Hi Dan,
Yes. A test at 4 weeks (3rd or 4th gen test) is absolutely good enough.
rgds
Dr Tan
You’re awesome. Just thought you should know that. I’d buy you a beer if I could.
Hi Dan,
Thank you for the compliment and virtual beer.
rgds
Dr Tan
hi doc ,
i am getting this fear of getting infected with hiv while testing….
can u tell me how long can hiv virus survive on needle used for finger prick testing …..?? i am scared that while testing the lab technician might have by mistake used the needle used for testing the previous person, on me ……
i have heard that hiv dies very rapidly while exposed to atmosphere …….
thanks and regards …..
Hi fromindia,
This is an unecessary worry. Please refer to my reply to Mona C. on this issue.
rgds
Dr Tan
hello doc,
i saw the your reply to Mona.C … but in my case the lab technician had used a syringe needle to prick my finger instead of a lancet …. so is your answer to MONA.C valid for me also …????
thanks and regards …..
Hi fromindia,
Yes it is the same. It will only be different if the lab technician used an already used syringe to draw blood from your vein. If this was the case and he really used a contaminated syringe then your risk of HIV is very high.
rgds
Dr Tan
hi doc,
the technicain did not draw blood from my vein ….. he just pricked my finger using the needle …..
assuming if the syringe needle was used previously to draw blood from a hiv person through his veins and then by mistake used on me only for finger pricking(not drawing blood through vein) …. can this cause hiv???
hope u understood my doubt …
thanks and regards ….
Hi fromindia,
What is the use of asking me all this? What is the use of creating all these scenarios in your mind to worry yourself? There is just no end to ‘assumptions’ and ‘what ifs’. If you are really so concerned about this then I suggest you call up the lab and ask them if them for their infection control policies. Once you enter the realm of ‘what if’ then there is no way that I can give you any kind of reassurance.
rgds
Dr Tan
i had protected sexual intercourse with a random lady in March 2011.
I did some finger testing in government clinic(malaysia)
1st. time is about 2 months after
2nd. 3 months after
3rd. 7 months after.
all results are negative.
Is the result conclusive?
Hi worry,
A HIV test at 7 months post exposure is conclusive. Please stop worrying.
rgds
Dr Tan
Thanks Dr. Tan,
I have less worries after reading your comments with everyone here. I was concern with rash at my body despite the result is Negative.
Thank you Dr. Tan
Hi worry,
You should see a doctor about your rash. There are many other diseases aside from HIV or STDs that can cause a rash.
rgds
Dr Tan
I recently got a test @ 38 days. DNA PCR combined with an antibody test. The results were negative/not detected on the PCR and Non Reactive on the antibody. Is this conclusive and can I stop worrying?
Hi Can’t sleep…,
Yes you can stop worrying. A DNA PCR test at 38 days post exposure is absolutely conclusive. Accept the fact that you do not have HIV and go get some sleep.
rgds
Dr Tan
DR : HELLO, I AM VERY WORRIED TO KNOW HOW ACURATE IS EZ- TRUST HOME KIT TEST.. AT 3 MONTHS EVEN AT 4?? CAN I TRUST IN THIS TEST? OR SHOULD I HAVE ANOTHER IN AN HOSPITAL?
PLEASE ANSWER ME!!
THANK YOU VERY VERY MUCH!
BEST REGARDS
Hi DANI VERY WORRIED,
You should check the Caps lock on your keyboard. I generally am extremely suspicious of Home Test Kits. There is the question of their accuracy, authenticity and quality. Also, there is the question of whether you conducted the test properly and read it properly. Finally, there is no advise and support on the outcome of the tests and hence you are writing to me now. Please go see a doctor and have a proper HIV test done.
rgds
Dr Tan
hello dear dr. i told u that i had taken duo test on 23rd days after exposure, and u told me that the test is beyond 3 weeks is conclusive, is this accurate na, now its 30 days but i m not having symptom like fever, sore throat, but having hyper acidity problem since from 10 days, i m having a acidity problem since from 5 years and geeting rabeprazole 20 mg 4 days in week, i m not sleeping properly since from 20 days, and also started smoking 1 or 2 cigrette daily still, now i m taking rablet-d tablet since from 5 days, but still having acidity, is this is due to, not sleeping properly or due to smoking
Hi kk sharma,
You do not have HIV. Your other medical problems are really beyond the scope of this forum. Please see your doctor for proper diagnosis and management.
rgds
Dr Tan
thanks, dear doctor, if u dont mind can i ask 1 question, its all about my doubt pls dont mind, how confidently u say that i dont have HIV, pls reply sir.
thks
regards
Hi kk sharma,
I cannot remember the details of your exposure and tests. Please remind me.
rgds
Dr Tan
i had unprotected oral sex (get sucked) with hiv+ guy, i had taken hiv duo ultra IV GENERATION blood test at 23 days post exposure the results came like that, HIV-1 & HIV-2 – NON REACTIVE, AND P24 ANTIGEN – NOT DETECTED IS THIS CONCLUSIVE
Hi kk sharma,
No it is not. Get the same test done at 4 weeks post exposure.
rgds
Dr Tan
earlier u told me that test beyond 3 weeks is 99.9% accurate
23 days is fine
dear dr. above are my exposure and tests,on which earlier we had talked, thanks for reply, regards
It’s been 60 days since I cheated on my husband. I had unprotected oral sex and a few protected sex but there was once where he tried to be inside me for a few seconds(w/o) condom and I push him away
I’m so paranoid and took a HIV I/II antibody blood test and all std test 13 days later and it was non-reactive. I didn’t know I was still within the window period. My doc said just check again in 6 months.
What should I do now? What test I should take now and when and where? I need Help!!! I’m freakin out.
Hi Cheated,
At 13 days post exposure, your tests for Chlamydia, Gonorrhea and NSU would be accurate. However, your tests for HIV, Syphilis, Hepatitis ABC, Herpes will not be accurate. You do not need to wait till 6 months. All these tests will be accurate at 3 months. If you are in Singapore you can come to my clinic for these tests. All it takes is for us to draw some blood. You can get the HIV, Syphilis and Hepatitis B results within 20 minutes. The rest of the tests take about a week to get results.
rgds
Dr Tan
2 months ago I had foreplay w/o condom and he was I inside of me for a few seconds before I pushed him away. 13 days later I took a HIV I/II test results are non-reactive. Now I realize i was still at the window period. What test should I test now? I need help
Hi Hopeless,
At 2 months post exposure you just need a straightforward HIV antibody rapid test.
rgds
Dr Tan
hi doc,
sorry i am asking all paranoid kind of questions ….
but i just want to know whether needle used in finger pricking(without the syringe) can cause infection if it was earlier used for drawing blood from vein ….?
thanks and regards …..
Hi fromindia,
There is no medical evidence to support or refute this.
rgds
Dr Tan
Dear doc,
I had 2 exposures, one 2 months ago, and one just yesterday.
2 months ago, i engage in mutual masturbation and oral sex, and some anal playing (where rubbing the penis at the anal only. no penetration)
and yesterday, it was only mutual masturbation. However i did lick once the penis of the dude, but thats all.
So, do i need a test for hiv? if i do, which event should i start counting the day from?
Hi Luke,
You only require a HIV test for the 1st exposure and not the 2nd. Get a HIV test done 3 months from the 1st exposure.
rgds
Dr Tan
thank you doctor.
does anal playing is a risky act? how would you assess my risk on my 1st exposure?
Hi Luke,
It depends on what you mean aby ‘anal playing’. If it just skin to skin contact then it carries no risk at all. Your risk from the 1st exposure is very low.
rgds
Dr Tan
i was rubbing between the cheeks, maybe poke the anus a little and pressing hard, but there was no penetration. i didnt feel anything. I WILL have felt it if i penetrated it right? i mean, it is not a normal and no feeling thingy, even though it was my first having an anus close to my penis right? anyway, I also heard some doctor doesn’t even recomending testing on particularly oral sex exposures?
any replies doctor?
Hi Luke,
What was your question? I thought I replied to all your queries.
rgds
Dr Tan
does touching the anus with my penis, without any futher penetration, considered skin-to-skin or risky? i did apply some pressure on the anus with my penis, but i definitely sure there is no penetration.
Hi Luke,
Are you asking me if there is a risk for HIV transmission? I would say there is but the risk is not high.
rgds
Dr Tan
Im asking if frottage poses a risk for hiv transmission?
Hi Luke,
There is a difference between possibility and probability. So the answer to your question is: yes it is possible but highly unprobable.
rgds
Dr Tan
Hi Doc;
Like as i said i had negative 8 weeks, so tomorrow im planning to go and test for my 10 weeks; however, iv been feeling a lot tired and sore throat which lasted for two weeks, i jst assume is anxiety since i spend most of my time on internet reading about hiv,
I pray and hope that my 10 weeks test will come back negative as well.
Hi Thaps,
I’m already convinced your 10 weeks test will turn out negative. Let me know if I’m right.
rgds
Dr Tan
Hi Dr. Tan,
Kind of worried here…had unprotected vagina sex twice(same night)with a girl I met. There was some skin abrasion on shaft due to dryness. I found out acouple weeks later she was a heavy intravenous drug user. Of course I freaked out and she said was was on a methadone program afew months ago and was tested for hiv; tested negative. But of course, its kind of hard to trust a drug addict…
So, I purchased a bunch of accu-sal HIV1/2 saliva antibody test kits. Tested negative at 3, 4, and 5 week post exposure. It says the test is 99.8% accurate but doesn’t give the timeframe post exposure; guessing at 3 month mark. Given I took it earlier, how accurate would you think my results are?
Thanks in advance,
Hi Chris Rider,
First of all, even if your partner had raging HIV, your risk from unprotected insertive vaginal sex is still very low. Different studies have placed the risk anywhere between 0.1% and 0.01%. I am unable to find any independent reports on the sensitivity of the Accusal test kits. Assuming that these kits have been validated against EIA tests, then it is safe to say the test at 5 weeks post exposure is very close to being conclusive. Easily 99% accurate. I would suggest for your final conclusive test that you get it done at a doctor’s office instead of doing a home test. It would give you more closure and peace of mind I think.
rgds
Dr Tan
hi doctor,
iam from india.
i had sex with a lady 1 and half year before.she was adove 50 years old and her status was unknown.
after intercourse i have taken one antibiotic tablet.
At the 4th month i got fever and loose motion.then by 7th month i got gastric problem ,hear burn , stomach and skin inflammation.
so i afriad due to these symptoms and i tested on
8th month— Hiv 1&2(Ab/P24Ag,Serum/Elisa)-Non Reactive.
9th month— 1.Hiv1&2(Ab/P24Ag,Serum/Elisa)-Non Reactive.
2.2.VDRL-negative
10th month— Hiv1&2(Ab/P24Ag,Serum/Elisa)-Non Reactive and also after 15 days i did
Special serology 1&2(hiv1&2- kit test)- negative
11th month— 1.Special serology 1&2(hiv1&2- kit test)- negative
2.VDRL-negative
12th month— 1.Special serology 1&2(hiv1&2- kit test)- negative
2.VDRL-negative
3.HbsAg-negative
4.Hcv- positive
13th month— 1. Special serology 1&2(hiv1&2- kit test)- negative
2. Hcv – positive
14th month— 1.Hiv1&2(Ab/P24Ag,Serum/Elisa)-Non Reactive
2.RPR(VDRL)- non reactive
3.Hcv-negative
15th month—1. Western blot- all are not detected.
2. Special serology 1&2(hiv1&2- kit test)- negative
3. hcv- negative
16th month— 1.Special serology 1&2(hiv1&2- kit test)- negative.
2. VDRL-negative
3.Hbsag- negative
4. hcv – negative
Doctor i got hcv with minimum range. so doctor advice me no need of treatment for this and there is chance to cure automatically.
by luckly last two months i got Hcv- negative.
now i am having gastric problem ,hear burn , stomach and skin inflammation. doctor told me i got stomach ulcer that may be due to Hpylori.iam getting treatment for that.
due to these sysmptoms i was very scared.
My doctor told me no need for further Hiv test because the window period is 3 months.
iam really very scared please help……
1.Hiv1&2(Ab/P24Ag,Serum/Elisa) this is 4th generation test?
2.Do i need any other HIV test to conform?
3.iam free from HIV or not?
Hi scared,
1. HIV P24 Ag/Ab test is a 4th Gen test. 2. No you do not. 3. Yes you are free of HIV.
rgds
Dr Tan
My partner massage for me at the back of my body then my asshole got some sore my partners precum touch the sore I tested using ez trust 5 weeks 4 days negative I’m I in risk?
Hi Worry ever,
I think your risk for HIV is very low. However, you still need to repeat the HIV test at 3 months post exposure. Please see a doctor for a HIV test rather than getting a home test kit.
rgds
Dr Tan
Ez trust is not accurate?
Hi Worry ever,
There are many more considerations to home testing than just the accuracy of the test kit. We need to make sure the test was conducted properly and you need a professional to advise you on the results and implications of the test results. Also to educate you on safe sex and how to remain safe and disease free.
rgds
Dr Tan
Dr tan I wanted to ask ask if a precum touches the sore will the risk of getting HIV high ?i tested negative using ez trust
Hi Worry ever,
This is a repeat post from you. Please see my previous reply.
rgds
Dr Tan
hello doctor,
after 7 months of my post exposure i tested
HIV 1&2(ab/P24Ag, serum/Elisa)- Non Reactive
This test is 100% accurate or need to take a RNA PCR test to conform doctor?
Hi help,
A HIV antibody test at 7 months post exposure is conclusive. You do not need any other tests.
rgds
Dr Tan
Hello dr tan
It’s mean I am HIV free & can I get married?
Hi Peg,
Yes. It means you are HIV free and can get married. I wish you a beautiful wedding and blissful marriage.
rgds
Dr Tan
Hi Dr. Tan,
First and foremost I would like to say that you a very kind person as I noticed you reply to every question posted and out of honesty, not many doctors would do that online.
Just a small questions, recently I had protected sex but.. received a blowjob and handjob with any protection. I went for a test 21 weeks after exposure for Hepatitis C, Hepatitis B and HIV. It all was negative as below with details:
HBS Antigen : Nonreactive
Hepatitis C Antibody : Nonreactive
HIV 1 & HIV 11 (By elisa) : Nonreactive
The thing is, I have herpes and I was wondering if this could affect the window period. Should i get tested again… Do advice..
Thanks a lot and God bless
Hi Shamsher,
Very nice and unique nik. Thank you for your compliment. I must say that your risk of HIV is extremely low. But that does not matter because a test at 21 weeks post exposure is accurate and conclusive. Herpes will not affect the results. You do not have HIV. Please forget about this and move on.
rgds
Dr Tan
OK.Noted…. Sorry to bother you again..But I have another small question which I forgot to ask before…..
How about the Hepatitis B and Hepatitis C results. Is 21 weeks after exposure testing conclusive…or should I test again for Hepatitis B and C…
Because I have heard before that..at times.. if u contract hepatitis together with HIV.. it can delay both of the window period…
Thanks you once again…
Hi Shamsher,
21 weeks post exposure tests for Hepatitis B and C are also conclusive. If you are not vaccinated against Hepatitis B I strongly suggest that you go get some shots. Hepatitis is endemic in SEA.
rgds
Dr Tan
Hi Dr.Tan,
Thanks a lot for the clarification and..yess… I just got my hepatitis B first dose last month….but.. need 2 more dose’s to be fully vaccinated…
Just another small enquiry for future reference..just say..in the future..if I ever get into type of more serious exposure…for example…having sex without any protection….
what would be the window period that I should wait to get tested for HIV, Hepatitis B and Hepatitis C….. since..in Malaysia..they sometimes recommend to wait for 6 months…and me having herpes…
Thank u very much…and this would be my last question
Hi Shamsher,
For my practice, getting tested 3 months post exposure is enough. But you should listen to the advice of your doctors. Because they are most familiar with the types of test they are using and your clinical situation.
rgds
Dr Tan
Hi Dr.Tan
Noted, I understand your point. To be honest, I am actually still a uni student and have just gone direct to a good private blood test centre here to get tested. My parents are not too open to this kind of matters.
You mentioned that it depends on the type of test as well.
In your opinion then.. if I went for an ELISA HIV test and for Hepatitis B & C test which the results showed as(Not sure the type):
HBS Antigen : Nonreactive
Hepatitis C Antibody :Nonreactive
In your opinion, for these kinds of test, is a 3 month window period conclusive then.
And one again,I am really sorry for asking you too many questions as I am sure you a very busy with other matters as well..
Hi Shamsher,
In my opinion it is. However, I still advise you to check with the lab.
rgds
Dr Tan
Hi Dr.tan
OK,thanks alot for your advice and help. Appreciate it, I suppose I will just wait for few more weeks and test again once I have reached the 6 month mark, just for peace of mind..:)
Thank you again….:)
Hi Shamsher,
You are welcome.
rgds
Dr Tan
Hello dr tan
one question.. I had sexual encounter with a girl 3 weeks ago, protected vaginal penetration and unprotected oral (receiving and giving). ten days ago I started having a common cold which is still on ( nasal discharge, congestion) but no fever no joints pain or anything of the ars symptoms I have read online.
The fact the common cold symptoms are still there ,do you think it could be ARS?
Thank u
Hi Sujey,
It is very difficult to tell ARS apart from the common cold. However, 10 days post exposure is a little too early to develop ARS.
rgds
Dr Tan
Thank u. when does ARS develop? I was reading ARS are more flu like than common cold?
Hi Sujey,
Not everyone will develop ARS. If ARS does develop, it most commonly develops between 3 to 4 weeks post exposure. It is also clinically very difficult to tell a flu and common cold apart. You should ask yourself why are you asking all these questions? If you are trying to diagnose or risk stratify HIV possibiity based on ARS then I say don’t bother. It will only cause worry and will never be accurate.
rgds
Dr Tan
So in other words I have low risk exposure you would say?
Hi Sujey,
I am currently dealing with many patient questions and really cannot recall the details of your exposure. Please let me know again.
rgds
Dr Tan
Hi,
Again thank you Doctor. My encounter was protected vaginal sex and unprotected oral (giving and receiving).
Sujey
Hi Sujey,
In that case your risk is absolutely minimal.
rgds
Dr Tan
Hi Dr Tan,
I’ll just like to know specifically of the exposure to HIV by receiving blood in Singapore. My medical condition requires me to have monthly blood transfusions. Will blood received from donors be tested for HIV first?
Hi Jane,
Our blood bank has an extremely thorough donor screening system. Donor blood is tested for HIV and a whole host of other blood borne infectious diseases. You can refer to this link for more details: http://www.hsa.gov.sg/publish/hsaportal/en/health_services/transfusion_medicine/donor_testing.html
rgds
Dr Tan
hi doctor,
At the 7th month of my post exposure i did Hiv1&2(ab,p24ag/serum,Elisa)-non reactive
then at the 10th month i did Western Blot – Negative for both Hiv1&2.
In that patient Result:
Hiv1-all are Not detected
Hiv2- Not detectec
INTERPRETATION:
Hiv1&2 negative is reported when only control bands or control band with p51/55 is detected.
i hope my result should be fine.
Doctor told me the above message in interpretation was the short term of the process and it will be automatically generated to every one so no need to confuse with that.
But i need second opinion.
what does control band with p51/55 is detected means?
kindly help to understand the result.
Hi doctor,
kindly help me to understand the result…
Hi help,
Your result means you do not have HIV.
rgds
Dr Tan
Hi help,
The only thing you need to know about the result is that it is conclusive of that fact that you do not have HIV. Please do not analyse it further and find reasons to scare yourself.
rgds
Dr Tan
hi doctor can i get married and have unprotected sex with my wife?
hi doctor,
It’s mean I am HIV free & can I get married?I don’t need retest?
Hi help,
You do not have HIV. You do not require a re-test. I cannot advise you on your decision to get married.
rgds
Dr Tan
hi doctor tan,
thanks a lot you really great by helping others.
Hi help,
You do not have HIV. Whether or not you can get married and have sex with your wife is not a question for me to answer.
rgds
Dr Tan
hi doctor,
thanks for ur kind reply
hi doctor,
i am going to get married. so only i asked.
can i forget about these and continue my normal life doctor?
Hi help,
How many times are you going to ask me the same question and get the same reply?
rgds
Dr Tan
hi doctor,
i was really scared. so only i asked that question repeatedly.
if anything wrong please forgive me.
Now i realized that i am free from HIV.
thanks a lot doctor…
you are really helped me to understand.
Hi help,
My response wasn’t meant to chastise you. It was meant to illustrate to you the irrationality of your line of questioning. I am glad you finally have accepted the fact that you do not have HIV. I wish you a long happy and healthy life.
rgds
Dr Tan
hi doctor its me again
yesterday i got my five months Elisa test and it was negative using 3rd generation so is conclusive and can I celebrate ????? or i must take another test after 6 month ?
Hi Amr,
Yes you can. A 3rd Gen test at 5 months post exposure is conclusive. You do not need to test at 6 months.
rgds
Dr Tan
Hi Dr Tan, I’m a lady who has had unprotected sex last September to a China man. It has been more than 12 months since the exposure.. My health has been generally good with heat rashes occurring frequently.
Should I go for HIV test? If so, which test should i go for?
Hi help,
Yes you should go for a HIV antibody test.
rgds
Dr Tan
Hello from the States. I have a question for you. If a person is possibly infected with hiv, and dont know it, and then get re-infected while they are in their window period or 3 months pass the 1 time of possible exposure would that delayed hiv seroconversion?
Hi Anthony,
Hello from Singapore. What you are talking about is HIV superinfection. In other words, getting infected with HIV then re-infected with a seperate strain. This will not influence the window period. It however makes treatment very challenging.
rgds
Dr Tan
Hi good doctor, thanks for your services on the website. i would like to know if u can answer this question. they say when someone has advanced aids they dont produce hiv antibodies, can this be possible with newly infected people. like can hiv damage the immune system in 6 months or a year and cause people to test negative on the antibody test?
Hi Peter,
It takes many years for HIV to damage the immune system enough to cause AIDS. In fact, in the first few weeks of a HIV infection, the body mounts a very strong immune response to fight off the HIV and in this time produce many antibodies. This battle that the body fights against HIV lasts for many years until about 8 to 10 years after infection, the immune system is damaged to such a degree that the patient develops AIDS. It is therefore impossible for HIV to damage the immune system in any significant way within the first years of infection.
rgds
Dr Tan
Doctor,
i did the 4th generation HIV 1&2 antigen and antibody test after 3rd and 6th month of my post exposure.
my result was non reactive.
is that conclusive?
Hi MMM,
You should not even have wasted your money on a 4th gen test. The P24 component is not accurate 6 weeks post exposure. The antibody component however is very accurate at 3 and 6 months post exposure. In fact, your results are definitely conclusive. You do not have HIV.
rgds
Dr Tan
Hi Dr, is the test “p24 antigen + antibody anti HIV (1+2)” accurate 35 days after exposure?
thank you,
Hi Jhonny,
Yes it is.
rgds
Dr Tan
Dear doctor,
is a test post 81 days conclusive for me?
Hi Luke,
You mean a HIV antibody test? MOH says 3 months post exposure.
rgds
Dr Tan
Yes. An HIV antibody test. 3rd generation test, if not mistaken. does 81 days can be enough?
Hi Luke,
Yes, a HIV anitbody test at 81 days exposure can be deemed to be conclusive.
rgds
Dr Tan
Dear doc, how likely is a test after the window period to be false negative?
Hi Luke,
What is the point of having a window period if the test is going to be false negative after that? Then that shouldn’t be the window period in the first place.
rgds
Dr Tan
hello Dr. i just came across your site. and from what i’ve read I find it very informative, thanks for all the work you do.Here’s my question. I had a possible exposure last year in october of 10 i got tested with orasure oral antibody test in november of 10′ 4weeks after the possible exposure it came back negative and then i got tested again in febuary of 11 with the ora-quick finger prick antibody test. which was also negaetive. but now im having symptoms like weight lost, neuropathy on one side of my body rashes and so on. I havent had any other exposure since my last one last year. i know they say wait 6 months to test but is it possible that my antibody test was inaccurant or the ora-quick antibody wasn’t a good enough test to use? we dont have the duo test I see on this site use. we only had the antibody test. was that test efficient enough, and is it possible that im the 3 percent that developed antibodies after 3months ?
Hi Avon,
Antibody production is delayed beyond 3 months only is your immune system is severely compromised eg you are undergoing chemotherapy. Otherwise, the Oraquick test at 3 months post exposure is deemed to be conclusive. You really need to see a doctor about your symptoms. They sound potentially serious. Do not be so caught up in worrying about HIV that you forget the possibility of other diseases.
rgds
Dr Tan
Hello Dr.
I had unprotected sex but the guy did not cum inside of me and it did not last a long time. I took a HIV Test ( Antibody Test) Home Access that is approved by the FDA 7 weeks about 49 days after the potential exposure and the results were negative. How accurate are these results?
Thanks
Hi DereckZenon,
Very accurate. In fact, some doctors would say 100% accurate. Most health authorities will still advise you to retest at 3 months post exposure.
rgds
Dr Tan
dear doc
i did ELISA test after 4 months of my post exposure..
my result was non reactive..
is that conclusive?100% accurate?
thanx doc..
Hi adidas,
It really depends on what type of ELISA tests you got done. Most modern tests are accurate at 3 months post exposure. What did the doctor who conducted the test for you say?
rgds
Dr Tan
Hi Doctor Tan,
Firstly, I would like to thank you for your continued efforts and endeavours in maintaining a web based avenue for the worried and anxious.
Secondly, I unfortunately fall into that catergory. If you would please, kindly help with some of these concerns i have detailed below :
1) I have been to your clinic for a quick test (i’m not sure which one is was, it cost $50 and was done with a fingerprick blood sample) @ 6 weeks after exposure (protected with CSW, unprotected oral)Negative. Could you advise the test name please?
2) I’ve also been to the DCS clinic at Kelantan lane for testing and was told by the doctors that she is unable to confirm or verify the accruracy of any test done outside. She said the test they use is accrurate and approved by MOH whereas GPs may used cheaper and non approved brands which may be give false negatives. This got me very concerned and started to slide into negative thoughts once more.
3) In my panic mode, i started to research and read more about HIV. In doing so, I’m surprised at the HIV rates in Singapore. 1 in 1000 confirmed? There is probably alot more undectected out there.. i think its fair to say 3-4 out of 1000 people in Singapore have HIV.
What further messes my mind is that … most of these cases >50%.. are detected at the late stage of HIV..
Panic question : does this mean that there are alot of people seroconverting only after 1-2 years???? or tying it in with question 2… does this mean alot of tests done outside the DSC and hospitals are less than accrurate ?? Hence people only find out they have HIV years later during a hospital visit.
Sorry for these questions / doubts which may seem to offend but they are actually deep concerns of mine which i hope you could advise with your experience and knowledge
Thank you kindly
Hi Kevin,
We only use 2 rapid tests in our clinic. Oraquick and Determine. Both are approved and validated by FDA and MOH. It is absolutely true what the doctor at DSC said but this does not apply to us. Remember that we are a MOH approved anonymous HIV screening centre. We adhere to very strict guidelines. The statistics you read are correct. It means that most people are NOT going for HIV tests when they need to. Most people choose to ignore that fact that they are at risk of HIV and only detect it after they develop AIDS symptoms like Pneumocystis Pneumonia which ends them up in hospital. If they tested earlier they would have found out earlier and not ended up in hospital in the first place. Also they would have not spent years potentially spreading HIV to other people. It is for this exact reason that MOH came up with anonymous screening centres like mine. It is to reduce the barriers to people having HIV test. Hopefully this will encourage them to test earlier and reduce the public health consequences. Nobody seroconverts after 1 to 2 years. That’s absolute rubbish. As for tests done outside DSC and the hospitals, I can only say my clinic uses only FDA and MOH approved tests. I am unable to comment on the practices of other clinics.
rgds
Dr Tan
Thanks for your prompt reply sir.
I am in agreement and would urge friends of risk to get tested regularly.
Am still not clear on the first question though. So did i do a antigen ? antibody ? determine? or oraquick test at your clinic? (Was too nervous to ask that day) But I remembered it cost SGD50 and you took a blood sample from a finger prick onto a white strip of ?paper? and I waited 15mins for the result.
Panic question : Is that an accrurate test for an exposure 6 weeks ago. As well as 5 years ago? Sorry but i somehow have this impression these quick test cover the periods of 1-3 months and not exposure 2-5 years ago.
Thank you once again~
Hi Kevin,
It was the Determine HIV 1 + 2 Antibody test. It covers all exposures more than 3 months back.
rgds
Dr Tan
Oh dear…
I thought it was the oraquick test? From reading the posts here.. this antibody test at 6 weeks is not accrurate? It’s my 7th week now. What test do you sugegst i do to ease my fears?
Hi Kevin,
The Oraquick test is also an antibody test. Most health authorities recommend a 3 month testing window for HIV antibody tests. Although most statistics show antibody tests at 6 weeks post exposure is already extremely accurate. Some would even say 100% accurate. What I suggest you do is not worry so much and have a repeat antibody test at 3 months post exposure.
rgds
Dr Tan
Dear Dr Tan:
I have some questions which I would be more than grateful if you can help clarify:
Does HIV die automatically when it is exposed to air, or does the virus completely die once the blood dries out? How long does HIV remain viable outside of a host? Also, I read that HIV has to enter the blood stream to infect but only targets specific cells the CD4 cells. Where exactly in the human body are these cells located? Lastly, I read that the average window period for HIV is about 25 days; so is a negative antibody test at about 30 days post exposure very reliable?
Thanks
Hi Kat,
This is a complicated question to answer. There is a difference between a virus ‘dying’ and becoming non-infectious. I think you are more concerned about when the HIV virus loses its infective potential rather than when it ‘dies’. Technically speaking a virus isn’t actually alive so it can’t ‘die’. Some studies have found that the HIV virus remains ‘alive’ for a long time outside the host. This however is affected by many factors such as the surface the blood is on, the ambient temperature, the surrounding humidity etc etc. But we do know that even though the virus remains ‘alive’ it loses its infective potential extremely rapidly (seconds). CD4 cells are in the blood. A test at 30 days post exposure is a good indication but NOT conclusive. We cannot rely on averages to determine adequacy of screening. We have to look at extremes.
rgds
Dr Tan
Dear Dr Tan:
So it seems my understanding of HIV was not correct. I thought that surviving was the same as being infectious. So essentially, the virus can survive and not be infectious outside the body? Is this correct? Also, why is it that HIV loses infectious potential within seconds? Is it because it is exposed to oxygen/air?
Thanks a lot!
Hi Kat,
A lot of this debate is based on the question ‘Is a virus a living thing?’ Aside from the fact that it seeks to self-replicate, a virus really does not have any other characteristics that we can use to say it is ‘alive’. It is, after all, only a strand of RNA enclosed in a protein shell. So scientists who study the survivabliity of HIV on surfaces use different methods to determine if it is ‘alive’ or not eg. whether or not it still retains reverse transcriptase activity. We cannot possibly conduct an experiment to inject dried out HIV into patients and see whether or not it retains its infectivity so that is a difficult one to determine. Some studies actually show that HIV can ‘survive’ on a surface for up to 7 days. However, the researchers of these studies are quick to point out that ‘Despite this long survival time, we know of no evidence that HIV is capable of being transmitted via contaminated fomites’. So we are back to square one. The general consensus amongst the scientific community right now is that HIV cannot be transmitted via a contaminated surface. We do not know exactly why. It could be exposure to oxygen or the physical drying out of the virus.
rgds
Dr Tan
hello Dr.,
thanks for your response. i had a negative “p24 Antigen + Antibody anti HIV (1+2) after 35 days. today its the 4 month but i realized some white patches at the end of the tongue that can be removed with the toothbrush. is the symptom related to HIV?
thank you
Hi Jhonny,
If your test is already conclusive, why are you even thinking about HIV? This forum is really not a platform for medical consultation. I suggest you see a doctor about the white patches on your tongue.
rgds
Dr Tan
Hi Dr.Tan
Just curious, for protected sex, it can greatly reduce the risk of contacting Syphilis,Gonorrhea and Chlamydia? What I know is HPV is body to body contact.
Thanks
Hi James,
Condoms greatly reduce the risk of HIV transmission. It also reduces the risk for Gonorrhea. However, the evidence for protection against Syphilis and Chlamydia is not as robust. So the even with the use of condoms, people should still be vigilant for STDs.
rgds
Dr Tan
Hi Dr Tan,
Thanks for your kind advise on my previous post.
Just a quick question – when is a good time to test for Syphillis and Chalamydia? Also, what test are involved in this?
Am looking to do these test at your clinic but afraid i’m in the window period.
Thanks
Hi Kevin,
You can test for Chlamydia 3 days post exposure and for Syphilis 90 days post exposure. Chlamydia – urine. Syphilis – finger prick blood.
rgds
Dr Tan
I just didi ag/ag 4th generation teat is it accurate enough for 6 weeks exposure precum?
Hi Ant,
I do not know if it was a typo or you intentionally used the words ‘didi’ ‘teat’ and ‘precum’. This is a forum that deals with serious issues. I would appreicate it if you do not make light of it by posting such messages.
Dr Tan
Sorry for typing wrong words I mean I had just done combined ag /ab 4 generation test yesterday comes out negative after 6 weeks exposure precum is it accurate
Hi Ant,
The P24 Ag component at 6 weeks is not accurate. The Antibody component is but cannot be deemed to be conclusive. My advise is for you to repeat an antibody test at 3 months post exposure.
rgds
Dr Tan
dear dr tan i had a blood test in license hospital yesterday using 4 generation antigen/antibody test is is accurate enough after 42 days exposure it means 6 weeks ? thanks for answering
dear dr tan im so worry
Hi scare scare,
You are doing that to yourself. Take a deep breath and calm down.
rgds
Dr Tan