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How Many Weeks After Possible Exposure Elisa Generation Test Is Conclusive For Negative Result?

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Posted on Tue, 10 Dec 2013
Question: At how many weeks after a possible exposure, the Elisa 4 th generation test (Hiv 1,2 +p24) is considered conclusive for negative result
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Answered by Dr. Sankaranantham Murugan (42 hours later)
Brief Answer: Moreconfirmatory after 4weeks of highrisk activity Detailed Answer: Hi, Welcome to XXXXXXX Thanks for posting your query. Elisa 4th generation is a combo test picks up both antigen and antibodies against HIV and highly reliable. P24 Antigen appears as early as 1 week itself, it becomes more conclusive after 4 weeks of possible infection. Antibodies against HIV 1&2 will take 8-12 weeks to appear (window period). But this test, if done after 3 weeks of high risk activity, it either confirms or rules out the infection with certainty. Dr S.Murugan
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Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Dr. Sankaranantham Murugan

HIV AIDS Specialist

Practicing since :1974

Answered : 3108 Questions

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How Many Weeks After Possible Exposure Elisa Generation Test Is Conclusive For Negative Result?

Brief Answer: Moreconfirmatory after 4weeks of highrisk activity Detailed Answer: Hi, Welcome to XXXXXXX Thanks for posting your query. Elisa 4th generation is a combo test picks up both antigen and antibodies against HIV and highly reliable. P24 Antigen appears as early as 1 week itself, it becomes more conclusive after 4 weeks of possible infection. Antibodies against HIV 1&2 will take 8-12 weeks to appear (window period). But this test, if done after 3 weeks of high risk activity, it either confirms or rules out the infection with certainty. Dr S.Murugan