Doctor insights on:
Hiv Rna Test Accuracy
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
Is my 8 wks 2 day PCR RNA + 4th Gen test negative conclusive for HIV infection after vaginal exp? Or do I need to test after 12 wks or it has to be after 13 wks? Pls answer, Thanks for any response
Relax, Mike: I understand that you're a man worried about HIV after an unprotected episode of intercourse with a woman. The nucleic acid tests are almost always positive by this time -- we can't even estimate the frequency of their turning positive only at 12 weeks because history isn't always accurate. Retest only if you or someone close to you is obsessed over it. Love wisely and well from now on. Cheers. ...Read more
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?
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
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
Uncertain...: There has been little or no research on the extent to which PEP, if unsuccessful in preventing HIV, delays diagnostic test conversion. Probably a negative RNA test 18 days after completing PEP is close to 100% reliable, but nobody knows for sure. Some experts continue testing for 3-6 months after PEP. That's one of its disadvantages: prolongation of the period of uncertainty and anxiety. ...Read more
What is the accuracy of HIV testing (antibody and antigen) 6 weeks post PEP? I had all tests (Neg) including the pcr rna test at 22 days post pep.
HIV testing & RNA: Read the CDC updated recommendations on HIV testing. The rationale for this test being available is that HIV RNA is detectable in plasma before antibodies. A safe approach is to be tested after the eclipse period after potential exposure when no RNA nor antibodies to HIV can be detected. The RNA test is effective around 10 days after infection but seroconversion to antibodies may take 3 months. ...Read more
Why PCR isn't good test for HIV diagnosis? Is it high Cost or low Accuracy? PCR RNA is better or DNA @ 6 mnth? Neg 3 DNA & 1 RNA PCR are 100% accurate?
Prednisone for 2 weeks can affect hiv rna pcr test and antibody test? So please tell which test to do for accuracy? Recently diagnosed with Bell's palsy
About 95%: RNA testing for HIV isn't usually recommended excapt in very high risk situations, like unprotected sex with a known-infected partner. But a negative result at 12 days probably is around 95% conclusive. For 100%, also have an HIV antibody blood test at 4 weeks. The combination of those two negative results will be conclusive. In the meantime, you can be very confident you weren't infected. ...Read more
Yes, but...: The HIV RNA tests are checking for the presence of certain parts of HIV. When positive, it can give us an idea of how much HIV is present. Most of the time, when positive, it highly suggests HIV infection. However, in rare instances, there can be false positive tests, which mean that a positive test may represent something else, not HIV. Thus, the best test for HIV is a standard HIV antibody test. ...Read more
Last night I have participated in sex and I am scared about HIV. ....Plz say me the cost of RNA test. ...And?
Rna test at 6 weeks negative and 4th gen. Test at 8 weeks. A lot of symptoms. Hiv possible exposure. How conclusive are these tests?
Still time to go: A true negative is after 6 months. ...Read more
HIV DUO 4th gen test at 35 & 47 came back negative, HIV RNA detection test at 35 days came back with NOT DETECTABLE, Will that conclusive?
Ater 4 wks which test better for HIV RNA or 4th generation some say either or and some say otherwise why n what our ur thoughts and beliefs?
Had a hiv rna test after 9 days & 12 hours post possible exposure (receiving oral non protected) and combo test after 24 days, both negative. Am I ok?
Not HIV transmission: HIV is not transmitted by receiving oral sex. That said, life can surprise you sometimes. One should continue to do routine HIV screening as advised by one's regular doctor. That means screening once or twice a year, if having a non-monogamous relationship (more than one partner). Whether or not receiving oral sex makes no difference, because that does not noticeably increase one's risk of HIV. ...Read more
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
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
Had HIV RNA test 10 days after unsafe sex and results came back negative. Would this be accurate result??
Tested too soon: No. You tested too soon.Get a more detailed answer ›
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
Human immunodeficiency virus (HIV) is a lentivirus (a member of the retrovirus family) that causes acquired immunodeficiency syndrome (aids),  a condition in humans in which progressive failure of the immune system allows life-threatening opportunistic infections ...Read more
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