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is hiv 4th generation cmia test at 7 weeks conclusive

Question: 

i had a protected vaginal sex with a sex worker but i licked her vagina without any protection or barrier and i tested for HIV with 4th generation cmia ag/ab test after 7 weeks and it came back negative. so is this test considered conclusive after 7 weeks of exposure because I'm to much worried

Answer: 

Hello,

Thank you for your inquiry. From what we gather from the question, you were asking about the accuracy of a negative result from a 4th Generation test conducted 7 weeks after a Low Risk exposure (evidence of transmission occurs through these activities when certain conditions are met).

It is very responsible to access HIV testing after a risky activity. Protected vaginal or anal sex, as well as performing oral sex without a barrier, are both considered to be low risk activities. This is because they can both meet the three components of the Transmission Equation when certain conditions are met, such as potential breakage of the condom during intercourse.

A 4th Generation HIV test is considered conclusive after 6 weeks by most HIV specialists because it is able to detect 99% of HIV infections at this time (1). It is important to note that some physicians and guidelines recommend testing 12 weeks post-exposure for completely conclusive results. Since your test was performed 7 weeks after exposure it is very likely that the result is accurate.

Recommendation: Refer to a physician for an HIV test 12 weeks post-exposure for completely conclusive results.

Regards,

AIDS Vancouver Helpline/Online, Marie