Dr. Tan and Partners is one of the few approved Anonymous HIV Testing Centres in Singapore. A detailed write up on our service is available here.

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HIV P24 Ag/Ab Test, Duo Test, Combo Test at our Clinic

Updated information on Rapid Anonymous HIV Combo test at our Clinics. 

 

Info leaflet for SD Bioline Combo Test

Info leaflet for SD Bioline Combo Test

I have been getting a lot of question with regards to the Duo test or Combo test as it is also known as.

Let’s first get some basics right:

Duo Test = Combo Test = P24 Ag/Ab test

All these terms refer to the same thing. Basically it is a test that simultaneously tests for the HIV P24 Antigen and the HIV antibody.

HIV Prevention within 72 hours of exposure (PEP) – Click Here

The HIV P24 antigen is a small piece of protein that is found on the capsule of the HIV virus. When a person is infected with HIV, these bits of protein can be found floating in the blood. The HIV P24 test is a test that detects these bits of protein. This test was first developed as a HIV screening test but rapidly ran out of favor due to the development of more advanced NAAT tests. (For more details on NAAT testing please read: http://www.drtanandpartners.com/nucleic-acid-amplification-testing-naat/)The window period for P24 testing is also very small. This test alone is only accurate for between 3 and 6 weeks post exposure. So it is a test with very limited applications unless combined with the HIV antibody test. The presence of P24 Antigens in the blood indicates a recent HIV infection.

Click here for details on getting the Combo test at our Clinics

We all already know that the HIV antibody test becomes quite reliable at 4 weeks and as good as conclusive at 6 weeks. Although most health authorities still recommend a 3 months window period. So putting these 2 tests together gives you a very powerful tool to diagnose HIV infection in as little as 3 weeks. Personally I prefer to conduct the Combo test at 4 weeks because I believe that is when the level of P24 antigen peaks in the blood giving us maximum accuracy.

In our clinic, we use the SD Bioline Rapid HIV Combo Test 2.0. It is a rapid test that takes only 20 minutes for us to get results. We are also approved to conduct this test as part of the Anonymous HIV testing Program.

The test is conducted very much like the HIV antibody test. All we need is blood from a finger prick. (For more details on Anonymous HIV Testing at our clinic please read: http://www.drtanandpartners.com/anonymous-hiv-testing-at-our-clinic/)

SD Bioline HIV Combo Test showing a positive result (2 red bars)

SD Bioline HIV Combo Test showing a positive result (2 red bars)

 

 

 

 

 

 

 

 

 

SD Bioline Combo HIV test showing a positive result. Note the test line is very faint. This could be due to a very recent HIV infection or the test could be false positive (1% chance).

SD Bioline Combo HIV test showing a positive result. Note the test line is very faint. This could be due to a very recent HIV infection or the test could be false positive (1% chance).

 

 

 

 

 

 

 

 

 

Multicentre clinical trials have shown 100% sensitivity and more than 99% specificity.

This kit has been registered with Singapore’s Health Science Authority (HSA).

So the Combo Test has many advantages including:

1. Earlier detection of HIV infection.

2. Rapid (20 minutes)

3. Anonymous

At our clinic the Combo Test costs $150.

Click on the picture for the latest information on the HIV testing Window Period

Click on the picture for the latest information on the HIV testing Window Period

 

 

 

 

 

 

 

 

 

Click here for HIV Testing FAQ

More on HIV symptoms.

If you have any questions, visit our free online forum on sexual health, HIV and STDs.

Click here for Info on STD Symptoms in Men
Click here for Info on STD Symptoms in Women
Click here to see the full range of our HIV/STD Services

 

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Need more advice?

Come down to Our Clinics for a discussion with Our Doctors, or call our clinics for more information:

1.) Robertson Walk – Anonymous HIV Clinic  (+65 6238 7810)

2.) Bencoolen Street (+65 6884 4119)

3.) Novena Medical Centre (+65 6397 2095)

4.) Scotts Medical Centre (+65 6694 2348)

5.) Somerset – Orchard Building (+65 6262 0762)

6.) Katong – East Coast Road (+65 6635 2551)

Where to find us – here

Click Here for Contact Details, Address and Opening Times.

Selected clinics are open on Saturday and Sunday.

Doctor’s Schedule here

Email: [email protected]

Click Here for Contact Details, Address and Opening Times.

All Our Doctors are Fully Certified and Trained to conduct specialised HIV Testing.

For lady patients who prefer female doctors, we have professional certified female Doctors to attend to your medical needs.


If you have any questions, visit our free online forum on sexual health, HIV and STDs.

If not read more about HIV symptoms.

Or find out more about Anonymous HIV testing at our clinics.

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Can’t wait for 3 months to find out? Find out more about Anonymous Rapid HIV Combo test at our clinics.

If you feel that you are at risk, please contact us to make an appointment for the HIV testing/screening.

Our Andrology and Infection Centre at Novena Medical Center is open.

Call us at 6397 2095 now to book your treatment.

Related Topics:

Anonymous HIV testing at our Clinics

HIV – Understanding the Window Period

Cost of HIV/STD tests at our Clinics

Condom Broke

Getting HIV from Oral Sex

More on HIV symptoms

How long can HIV live outside the body?

 


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.

Find the profiles of our panel of doctors.

Consultation $20.00-80.00
Rapid test only $20.00
(not inclusive of test)
8am – 5pm $60.00
5pm – 9pm $80.00
STD screening
Standard HIV, Syphilis, Hepatitis B/C, Herpes Simplex Virus Type I and II $ 200.00
Male
Urethritis
Urine – Chlamydia and Gonorrhoea PCR, Monilia, Trichomonas, NSU, Mycoplasma, Ureaplasma, Urine Culture, Candida $ 280.00
Female
Urethritis and Vaginitis
Vaginal Swab – Chlamydia and Gonorrhoea PCR, Monilia, Trichomonas PCR, Gardnerella PCR, Candida PCR, Group B StrepNSU, Mycoplasma, Ureaplasma, Direct Microscopy, Candida, Vaginal swab culture $ 345.00
Comprehensive (Male) Blood – Syphilis, Hepatitis B/C, Herpes Simplex Virus Type I and IIUrine – Chlamydia and Gonorrhoea PCR, Monilia, Trichomonas, NSU, Mycoplasma, Ureaplasma, Urine Culture, Candida $ 390.00
Comprehensive (Female) Blood – Syphilis, Hepatitis B/C, Herpes Simplex Virus Type I and IIVaginal Swab – Chlamydia and Gonorrhoea PCR, Monilia, Trichomonas PCR, Gardnerella PCR, Candida PCR, Group B StrepNSU, Mycoplasma, Ureaplasma, Direct Microscopy, Candida, Vaginal swab culture $ 525.00
Individual STD Tests
Determine Syphilis test Rapid Syphilis Test $ 50.00
Determine Hepatitis B Test Rapid Hepatitis B Test $ 50.00
Herpes Simplex Virus PCR Herpes Simplex Virus Polymerase Chain Reaction (PCR) Test $ 190.00
Chlamydia and Gonoccocal PCR Chlamydia and Gonorrhea  $188.00
Herpes Simplex Virus Type I IgG Antibody Herpes Type 1 $ 40.00
Herpes Simplex Virus Type II IgG Antibody Herpes Type 2 $ 40.00
Non-Specific Urethritis (NSU) Culture Mycoplasma, Ureaplasma $ 118.00
HIV test
HIV RNA/DNA Polymerase Chain Reaction (PCR) Test $600
Add $100 for expedited results
Rapid Fingerprick Blood HIV-1/2 P24 Antigen/Antibody Combo (HIV Duo Test) (4th generation!) $ 150.00
Rapid Oral Saliva HIV-1/2 Antibody Test (Oraquick) $ 50.00
Rapid Fingerprick Blood HIV-1/2 Antibody Test (Determine) $ 50.00
PEP $2000 – $2200

1,466 Comments

  1. hi doc I from malaysia

    I doing sex (first time) after 15day 26/9/17 i test klinik kesihatan rapid test 3generations negatif,after 53day sex 1/11/17 I test private klinik ag/ab negatif,conclusive or not???my next appointment with klinik kesihatan 26/12 next test…possibility my next test to positive high or low???I relly stress now…everyday I chek my body…sorry my English bad..please answer my question doc

  2. Hi,
    Looking for some advice. I had unprotected insertive vaginal sex with a sex worker in the UK. I’m a circumcised male and there was no visible blood or trauma.
    I spoke to her 4 weeks post exposure and asked her regarding her hiv status. She said she is tested monthly, her last test being 2 weeks ago (so 2 weeks post exposure) and that she was negative. Said she had certificate and documents from the hospital. Obviously I’ve not seen this and can’t say what she said is 100% the truth.
    I’ve had the following tests:
    14 days post exposure – Alere HIV Combo (antibody/antigen test) (20 min result) – Negative
    21 days post exposure – Alere HIV Combo (anti/antigen) (20 min result) – negative
    28 days post exposure – Alere HIV Combo (anti/antigen) (20 min result) – negative
    35 days post exposure – Alere HIV Combo (anti/antigen) (20 min result) – Negative
    38 days post exposure – HIV DUO Lab test (antibody/antigen) (next day result) – negative
    42 days post exposure – Alere HIV Combo (anti/antigen) (20 min result) – negative

    The doctor said to me that since I’ve not had any obvious HIV symptoms and that all the tests that I have had are negative I can forget about hiv.

    Just wondering if that’s correct advice or am I right to still be anxious?

    Do I need to retest again at 8 or 12 weeks?

    Thanks,
    Pablo

  3. alton cc

    Dear doctor
    I say not good english
    Today 50 days. I mean 7 week 1 days.I will re checked my hiv 1/2 ag and ab.. result 0.05.. when 35 days my ag and ab 0.07 after 15 days it reduse 0.02 i mean 0.05. Pls doctor say i recheck how days .

    I use condom sex with prostitute. But i touched prostitute clit 5 sec my left hand if i touched my panis left hand risk hiv effect? After sex when i open condom if some vaginal fluid touch my left hand and i wash water left hand my panis effect hiv?..after sex some precome on my panis head prostitute finger wipe this . This way any risk prostitute finger transmitted hiv… doctor i am not sleep no working panic for hiv. Pls give me a next suggestion. How days i recheck my hiv 1&2 ag and ab. Or no need test Pls answer me
    Thanks doctor

  4. Hello doctor,

    May I ask you a question.
    25.days, 42.days, 51.days fourth generation hiv duo ultra tests were negative.
    Can I trust that tests or need another duo at90 days.
    Many thanks .

    • Dr Elaine Loh

      Based on the description, I do not think you have HIV. If you are concerned, please get tested again 3 months from exposure.

  5. Hi dr tan

    I am janus from netherlands pls if you can help me out.90 days ago i had sex with a women hiv+ penetration was with a condom half on my penis i was drunk but i also fingered here and there was a lot of fluids on my hand all soaked after that i masturbated my self with the same hand stupid me. This encouter is for me a high risk but pls if you can help me out i have some question

    First lab test 12 days negative
    5 weeks 3 days lab test negative
    6.5 weeks alere rapid test negative
    9 weeks rapid test alere combo negative
    11 weeks lab test negative

    And i am still doubting a lot of anxiety and still all sympoms of hiv infection

    Can i say i was verry lucky or should i make another test at 90 days wich is tomorow

  6. Hi doctor,
    25 days, 42 days and 51.days vidas hiv duo ultra 4th generation tests was negative. Is it conclusive or I need another tests.?
    Many thanks.

  7. hi sir

    after protected anal and unprotected oral on a girl
    i made a test HIV ag/ab 1+2 and the result came 0.58
    i did the test before and the result was 0.12,0.14,0.10

    the result has been done after 29 days but my question why is that the number getting higher ?

    thank you sir 🙂

    • There are other similar non-HIV antibodies that can be detected by the test, and a margin of error allowed for detection. As long as it does not cross the threshold for “reactive” you are fine and do not have to worry. If you have further concerns, please speak to the healthcare providers that administered your testing.

      • than you sir

        1- you mean by threshold is >=1 ??
        2- should i consider myself conservative negative ?

        thank you Dr.

  8. Hello. Ive received answers from alot of blogs and paid medical forums saying that i have no risk. Its regarding hiv transmission on my shin (im afraid that vaginal fluid may have entered the skin) eventhough the skin upon inspection is intact. im worried about microwounds.

    So when can i test? And how much will the test cost?

  9. Hi doc

    Can we take a hiv duo test on 28th day or it should be after 28 days.

    I received a handjob from a massage therapist which was on August 27, 2017

    Test is for my peace of mind

  10. Dear Dr…Is 4th gen duo test conclusive at 28 days?….Some specialists saying it’s conclusive at 6 weeks…Some saying it’s at 3 months….It’s confusing….Please tell me why different opinions…..Which one we should follow.

    • Our opinion is that it is conclusive at 28 days. At the end of the day we are also just another expert, so the best place to go is your own medical doctor.

  11. Sorry to add on, but I had a ache and sore feeling on my gut are and the area between my butt and the testicles on the 1st week. The std clinic doctor told me to find another doctor for that. Could it be due to me trying to poop very hard for a few times while I was overseas? I visited the doctor he gave me antibiotics and it was gone after a few days. But at the 6th week it come back again. Only for a day though

  12. Had protected oral sex with sex worker(mouth to penis). Went to get tested for comprehensive urine check after 1 week,results were negative. Then had a Duo combo rapid test at 29 days after exposure. Result tested negative but there were some blood stains on it,but don’t think I saw the lines that state I am HIV positive,the nurse there told me that I tested negative. Do you reckon I need another test? Or am I cleared? Thanks

  13. I go for HIV duo test after 27 days..it’s come negative..my results is
    conclusive

  14. Hi Dr, i tested negative at 29 days post exposure with 4th generation ag/ab hiv test. My question is how you are so sure that it is conclusive after 28 days? because UK guidelines and CDC guidelines all stated that the result at 4 weeks only 95% accurate and we need to retest again at 6 weeks and 3 months. They said some people need more time to develop antigen n antibody

  15. My duo test on 24 days, 30days. 38ays conclusive for hiv. And other std check at six week conclusive at 40days conclusive?

    • The HIV tests are conclusive. The other STD check will depend on what was checked. But I would say the majority of STDs can be picked up by 40 days post-exposure.

  16. Hi Dr, i have done 4th generation ag/ab combo test with gribbles company in malaysia at 21 days(3 weeks) post exposure and it turn out negative. Can i rely on the result and expect it wouldn’t change in further test?

  17. Hi dr Tan, Went to your anonymous clinic last week and did the alere hiv combo test. Did the test at day 34 after exposure. Would like you to confirm that the negative test is a confirmation that I have no hiv. Thank you.

  18. Hi DR.. I had sex with a sex worker 2 weeks before.. I did CMIA test on 15th day and the result is non-reactive. My question is how many percentage is the result is accurate? Thank you

    • If your test was 4th generation and included antigen and antibody, it is a very good indication, but still not 100% conclusive. Please repeat a 4th gen test at 28 days or later.

  19. dr, just follow up, i just done a combo test after my exposed 21days and currently i have hives on my skin (around 1 weeks). the 21days combo test is negative and can i say that the rash that i hving is not related to ars?

  20. Hi dr, 2 weeks ago i was exposed to csw without any sex and oral. I was hj myself with condom. Currently i was hving a skin rash something like hives and will go for cpmbo test at your place.
    1. Hives is the ars?
    2. I was hj myself and the girl may touch my body is tht risk?
    3. Combo test at 21days is good indicate for my case as without any penetration?
    4. The ski rash like bump, become red then will slowly disappear and itch at night.is this the skin rash ars? It look like a large bump.

    • From the exposure you described, the risk of HIV transmission is zero. Hives can be caused by many things. If you are still concerned, please come down to our Robertson Walk clinic for a consult and evaluation of your rashes.

      • hi dr thks for reply,
        but hives can be the ars? and 21 days from exposed can i get a combo test to move on?

  21. Hi Dr.
    I had unprotected sex with my new girl friend on Apr 12 this year. She’s VDRL and Syphilis test March 7 was non reactive. I don’t know she’s current Hiv status but according to the employment last year June was non reactive. Any way I take Hiv p24 antigen test at 28days now waiting for the result. This antigen test result is whether conclusive or not. And then I already have plan to come your clinic for HIV and STD test screening. Please help me reply thanks.

    • The combo antigen+antibody test would be conclusive at 28 days. But you are welcome to come by our clinic for further consult and testing.

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