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Unprotected Sex

Question: 

Good afternoon, My case is as follow, I am a man an I had sex with a prostitute and the condom broke, I realized until we finished the intercourse. I got nervous and asked her to show me her HIV tests, she showed me, but the one was from 3 months ago and the result was NON-REACTIVE, I told her it was too old, so I asked her to go with me to a health center and perform an updated HIV test, she accept. The test was done and the result was likewise NON-REACTIVE. I was investigating post-exposure prophylaxis and as I found, in my country they do not apply it if the result of the test has been NEGATIVE (NON-REACTIVE). This is correct? I mean, can I be sure that she does not have HIV and therefore could not have infected to me? Beforehand thank you very much.

Answer: 

Hello,

Thank you for your inquiry. From what we gather from the question, you were asking about the possibility of acquiring HIV from someone (after engaging in sex with a broken condom) who previously tested negative for HIV 3 months ago and tested negative more recently. From the information given, this scenario is determined to be High Risk (evidence of transmission through these activities and is the majority of cases of transmission).

The scenario mentioned above does meet the three components of the Transmission Equation. Going for an HIV test after a high risk exposure is very responsible. Depending on the type of test conducted, the window period may vary, which may affect the accuracy of the results (1). If the person you had sex with acquired HIV very recently (within the window period of the test) then they may test negative for HIV even if they are positive. Although it is unlikely that this is the case, most physicians would recommend an HIV antibody test 12 weeks post-exposure for completely conclusive HIV test results.

Recommendation: Refer to a physician for an HIV test 12 weeks post-exposure

Regards,

AIDS Vancouver Helpline/Online, Marie