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Good evening,
Please help. i had unprotected sex with sex worker. Did an hiv rapid determine antibody test 6 weeks 5 days after PEP completion (10 weeks 5 days post exposure) which came back negative. But am worried of the oral thrush and ulcers on my tongue. Could this be seroconversion? Can i rely on my negative test results?


Hi there,

Thank you for your inquiry. From what we gather from the question, you were asking about the reliability of your negative test results received 6 weeks, 5 days after PEP completion.

The Rapid "point of care" testing method is considered highly accurate, at a rate of 99.9% (1). The testing window period for this test is between 4 weeks and 3 months (although 95% of infections are detectable between 4-6 weeks). Although official HIV testing guidelines recommend re-testing at 12 weeks for completely conclusive results, the reliability of your negative results stand.

While the thrush and ulcers on your tongue may signify a decreased immune function, it is nearly impossible to attribute these symptoms to seroconversion without adequate testing confirmation.

Recommendation: Please seek HIV testing at the recommended (3 months and 6 months) post PEP completion for completely conclusive results, and seek out a physician for any additional medical concerns you have concerning your oral thrush and ulcers.

All the best,

AIDS Vancouver Helpline/Online, Cody