Anonymous
I have had 3 instances of protected sex and once instance of receiving oral with no condom, with female sex workers - the first occurring Nov 5 and the most recent occurring Jan 18. On the 19th I did STD testing.

Everything came back negative, including HIV1 RNA QL TMA (undetected), HIV1&2 antibody diff (neg) BUT HIV ag/ab 4th gen was reactive.

On the 28th I tested at a public health clinic (cheek swab = negative, finger prick = negative).
On the 29th, I retested HIV1&2 antibody (negative), HIV antigen (p24) nonreactive, and I am waiting for HIV ultra nucleic acid testing results.

Judging by the types of exposure I had I don't see how I could be infected (I have no tattoos, never had a transfusion or injected drugs, or had any kind of anal sex, and no unprotected intercourse), and yet the probability of a false positive 4th generation antigen test seems very unlikely.

Based on the timing and type of my exposure, and the timing and type of testing I have done so far, am I conclusively negative? Assuming the nucleic test returns negative, would that be conclusive? Do I have a need to retest?

Very very stressed out about this and I appreciate your feedback. Thanks
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Anonymous
Hello and thank you for your questions! We are happy to help.

Your exposures are considered low risk. Unfortunately, however, it seems like you took many of these tests too early to effectively obtain your true HIV status. Each test requires a different window period. I will outline them below so that you have a better idea:

RNA NAAT "early test" : 10-12 days

NAAT (PCR RNA & DNA) and P24 antigen tests : 2-3 weeks

Western blot, Rapid, ELISA and 4th generation tests: 4 weeks - 3 months

Your positive result from the 4th generation test may have been due to the fact that you took it too early. As a standard, we use 3 months as a guideline for conclusive testing. In essence, it is not the *number* or tests you take, but *when* you take them that's important.

It may be in your best interest to seek a conclusive test at the 84 day (3 month) mark. This will be the most highly accurate test.

I hope this helps. Please let us know if you have any further questions. I will also provide you with some other online resources for your interest.

http://www.catie.ca

http://www.smartsexresource.com

Best,

Caroline

AIDS Vancouver Helpline/Online

Forum: http://www.helpline.aidsvancouver.org

Private and confidential
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