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test vih 4 generation

Question: 

Good morning,
I did an HIV test 45 days of the risk situation but did not say if it was 4 generation or what generation it was the following:

Anti HIV 1 + 2 AND ANTIGEN P24 NEGATIVE
Method: Electro-Chemiluminescence

This test is based on the simultaneous determination of IgG anti-HIV1 and anti-HIV2 and antigenaemia p24, which allows to reduce the delay between contamination and virus detection.

Is it a fourth generation test? The Spanish health ministry told me that a 4-generation test passed 6 weeks of the risk situation.
Thank you.

Answer: 

Hello,

Thank you for your inquiry. From what we gather from the question, you were asking about the type of HIV test you received and if it is classified as a 4th generation test.

HIV tests that only include testing for the presence of antibodies (Ab) to HIV-1/2 are classified as 3rd generation tests. These tests detect 95% of HIV infections 40 days after exposure and 99% of HIV infections 3 months after exposure (1). HIV tests that include testing for both the presence of HIV-1/2 antibodies as well as the p24 antigen are classified as 4th generation tests. These tests are able to detect 99% of infections 6 weeks after exposure and 99.8% of infections 12 weeks after exposure.

You received a 4th generation test. Most HIV specialists consider this type of test conclusive 6 week post-exposure as it is able to accurately detect HIV infection in 99% of people (1). Some physicians and guideline recommend re-testing 12 weeks post-exposure.

Recommendation: Refer to a physician for more personalized answers.

Regards,

AIDS Vancouver Helpline/Online, Marie