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HIGH RISK HIV EXPOSURE VAGINAL INTERCOURSE WITH SEX WORKER NO CONDOM

Question: 

AFTER A HIGH RISK HIV EXPOSURE DUE TO VAGINAL INTERCOURSE WITH A FEMALE SEX WORKER NO CONDOM AND MANY ARS SYMPTOMS. HOW MUCH STOCK SHOULD I PUT IN A NEGATIVE AG/AB HIV 1/2 TEST BY CMIA AT 51 DAYS AFTER EXPOSURE.

Answer: 

Hello,

Thank you for your inquiry. From what we gather from the question, you were asking about the risk of contracting HIV from having unprotected sex with someone who displayed signs of being HIV positive. 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) as it satisfies the components of the transmission equation (unprotected sex, sharing of vaginal/seminal fluid, with direct access to the bloodstream). If you are continuously engaging in high-risk activity, PrEP/PEP, further testing, and visiting your physician would be our recommendation for the future.

Regarding Antigen/Antibody testing: AG/AB tests can detect the presence of antigens/antibodies in the blood within 2-6 weeks of acquisition of HIV. Since your test taken 51 days (7 weeks) after exposure was negative, this would be considered reliable ("After 4 weeks >95% of infected individuals will have detectable antibodies at this time"). [1] However, official HIV testing guidelines recommend re-testing at 12 weeks for completely conclusive results (>99% of infected individuals will have a positive 4th generation enzyme immunoassays (EIA) tests after 12 weeks). [1] If you are still having anxieties, please refer to your physician for further testing.

Reference for interest: 1. https://www2.gov.bc.ca/assets/gov/health/about-bc-s-health-care-system/office-of-the-provincial-health-officer/hiv-testing-guidelines-bc.pdf

Regards,

AIDS Vancouver Helpline/Online, Sara