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Doctor insights on: Rna Hiv Test Locations

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What is the window period for p42 antigen/ antibody dual 4th gen HIV test? And the window period for HIV RNA PCR test? When can it be conclusive?

What is the window period for p42 antigen/ antibody dual 4th gen HIV test? And the window period for HIV RNA PCR test? When can it be conclusive?

See below: Please consult this site for a detailed answer. Nucleic acid tests are conclusive about a month after acquiring infection. http://www.sfaf.org/hiv-info/testing/hiv-test-window-periods.html ...Read more

Dr. Austina Cho
16 doctors shared insights

Hiv (Definition)

Hiv infection is caused by a retrovirus....This retrovirus binds to CD4 cells (for the most part). You may detect the virus by several different methods. An elisa test (enzyme linked immunosorbent assay). You may also detect it by doing a test referred to as a western blot (a gel protein electrophoresis). Thirdly by pcr (polymerase chain reaction) which ...Read more


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What is the most accurate type of HIV test?

What is the most accurate type of HIV test?

Serology: A standard serology (elisa, with western blot confirmation of positive results). ...Read more

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What is the accuracy of the RNA HIV test?

What is the accuracy of the RNA HIV test?

Not for diagnosis: It's very useful for monitoring the response to hiv, and it's accurate to diagnose or rule out acute HIV infection in someone with symptoms, but for simply diagnosing HIV infection, the HIV serology (antibody test) is better. That's because people who aren't infected can have false positive RNA tests, and people who are positive can have false negative RNA test. ...Read more

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Can you tell me how precise is the RNA HIV test ?

Can you tell me how precise is the RNA HIV test ?

HIV PCR testing: HIV testing using PCR technology is extremely accurate, infact sometimes 'too accurate' since lab errors can (very rarely) occur if there are even just a few strips of genetic material contaminating another vial. Whatever ur doc is telling u on your lab report, I would tend to trust- unless it just doesn't make sense clinically. Remember all labs have to correlate with what's going on with the pt. ...Read more

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How long after exposure is an RNA HIV test accurate?

3-7 days: HIV RNA can be detected by available methods like PCR within 3-7 days after exposure. If you suspect exposure it is recommended that you start post exposure prophylaxis (medication) within 3 days or as early as possible ...Read more

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After how many weeks of Exposure would the 4th gen HIV test be more accurate than a NAAT or RNA test?

After how many weeks of Exposure would the 4th gen HIV test be more accurate than a NAAT or RNA test?

It depends...: Unless the exposure was especially high risk, e.g. unprotected non-oral sex with a KNOWN infected person, NAAT testing should not be done at all. The 4th gen blood tests usually are positive at 2-3 weeks and always by 4 weeks. That's probably what you need. If the risk may have been genuinely high (e.g. unprotected anal with another guy), don't test online; see doc or clinic in person. ...Read more

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Took a hiv rna with a rapid hiv test at 47 days past exposure, came back negative should I trust this and move on ?

Move on, safetly: Be thankful for good health. Love wisely, love well, and cherish a memory -- human love is never perfect, and never totally safe, but you've given it and received it and that's a good thing. It's good that you're health conscious, and I hope that the years to come are safe and filled with real warmth. ...Read more

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I got RNA HIV test negative after 25 days after exposure should I be still worried or its 100 accurate? ? Please help

I got RNA HIV test negative after 25 days after exposure should I be still worried or its 100 accurate? ? Please help

Nothing is 100%: "old-school" reccs re-test at 3-6-12 months to be "sure" negative is negative. This is evolving to recheck at 6 months. If cannot stand the wait, 3 months will catch vast majority who will eventually convert. Can search "window period" to learn more about when test may be too early to show true positive. ...Read more

Dr. Lisa Oldson
348 doctors shared insights

Hiv Test (Definition)

There are several ways to detect the HIV virus. The first is by antibodies. This includes eia (enzyme immuno assay). The rapid HIV tests are these types. The second way detects proteins on the viral coat (western blot). This is a gel plate electrophoresis. Thirdly there is pcr (polymerase chain reaction). This detects and amplifies dna allowing a viral ...Read more


Dr. Ed Friedlander
1,422 doctors shared insights

Human Immunodeficiency Virus (Definition)

Human immunodeficiency virus (HIV) is a lentivirus (a member of the retrovirus family) that causes acquired immunodeficiency syndrome (aids), [1][2] a condition in humans in which progressive failure of the immune system allows life-threatening opportunistic infections ...Read more