Q. What are the chances of variation in the fourth-generation HIV test results between the 32nd and 45th day of exposure?
Hi doctor,
I took the HIV-1, HIV-2, and p24 tests on the 32nd day after exposure. I am attaching the file. I want to know whether this is a fourth generation test. If yes, what are the chances that a fourth-generation test is negative on the 32nd day and will turn positive after the 45th day?
Hi,
Welcome to icliniq.com.
The answers to your queries are:
- The test which has been performed is a fourth-generation test. This test looks for HIV (human immunodeficiency virus) antigens and antibodies. The test result (attachment removed to protect the patient's identity) is negative.
- If this result is negative on the 32nd day, a confirmatory HIV antibody rapid test is required at three months of last exposure.
Thank you doctor for the reply.
I wanted to ask how likely it is that a negative fourth-generation result post will turn positive if tested after 45 days.
Hello,
Welcome back to icliniq.com.
Most people (more than 95 %) infected with HIV show positivity in the first test, which is usually performed within four to six weeks of exposure. Having a negative HIV test at this time is quite assuring for further negative HIV test results.
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