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Doctor insights on: Accuracy Of Hiv Antibody Test At 4 Weeks

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What is the accuracy of HIV antibody test after 72 days?

What is the accuracy of HIV antibody test after 72 days?

See below: If the test for HIV antibody is positive, it is definitive. If it is negative, it does not rule out hiv. If the antibody test is negative you may wish to get HIV nucleic acid test, if that is negative, that should rule out hiv. ...Read more

Dr. Stephen Scholand
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 accuracy of HIV antibody test after 55 days?

What is the accuracy of HIV antibody test after 55 days?

Accuracy of ELISA: The elisa test is 99+% accurate (sensitive and specific) in individuals who have had the infection long enough for the assay to pick it up. For the 3rd generation tests used today, it can reliably detect individuals infected w/hiv at approximately 15 days. The 4th generation wh/tests for HIV antigen and antibody may show results even sooner. Always have testing done at a reliable certified lab. ...Read more

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What is the accuracy of HIV antibody test after 10 weeks?

What is the accuracy of HIV antibody test after 10 weeks?

ELISA at 22 weeks: 99+% sensitive and specific for hiv. In other words very accurate. This of course means if the testing is done in a certified laboratory. In the us we confirm all elisa with western blot testing. ...Read more

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What is the accuracy of HIV antibody test after 12 weeks?

What is the accuracy of HIV antibody test after 12 weeks?

HIV Elisa at 12 wks: 99+% sensitive and specific. In the us this is verified by a western blot test but in many countries it is considered such an accurate test that no further testing is done. ...Read more

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What is HIV antibody test accuracy?

What is HIV antibody test accuracy?

HIV testing: Yes. Of course it is. That is as long as you have allowed enough time to past for your body to produce antibodies against the HIV if you are infected. If you are not infected then if you only test with the HIV antibody test, you must wait six months after exposure for it to be fully reliable and accurate if you test negative.

The situation in reality is that no one need wait that long ...Read more

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What is the accuracy of a 22 week HIV antibody test?

ELISA at 22 weeks: 99+% sensitive and specific for hiv. In other words very accurate. This of course means if the testing is done in a certified laboratory. In the us we confirm all elisa with western blot testing. ...Read more

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What is the accuracy of 3rd gen. Hiv antibody test after 98 days?

What is the accuracy of 3rd gen. Hiv antibody test after 98 days?

Accuracy of ELISA: The elisa test is 99+% accurate (sensitive and specific) in individuals who have had the infection long enough for the assay to pick it up. For the 3rd generation tests used today, it can reliably detect individuals infected w/hiv at approximately 15 days. The 4th generation wh/tests for HIV antigen and antibody may show results even sooner. Always have testing done at a reliable certified lab. ...Read more

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What is the accuracy of the standard 3 month HIV antibody test if taken at 2 months instead of 3? the one they tell you takes 3 months usually.

What is the accuracy of the standard 3 month HIV antibody test if taken at 2 months instead of 3? the one they tell you takes 3 months usually.

Probably conclusive: These days, "standard" usually means a "third generation" HIV antibody test, or sometimes a duo or "4th generation" test for both antibody and p24 antigen. The duo test is conclusive any time 4 weeks or more after the last possible exposure. The 3rd gen tests are officially conclusive at 3 months, but are virtualy 100% reliable by 6-8 weeks. Either way, you're in the clear! ...Read more

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What is the accuracy of a standard HIV antibody blood test at 7 weeks after exposure?

Not certain the: Numbers but you want to avoid checking HIV screening tests in the first 12 weeks due to the latent period of the virus. Most pundits recommend to test between 3-6 months of exposure where antibody levels tend to correlate with presence of virus in sufficient quantities for measurement. ...Read more

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Can HCV co-infection affect the accuracy of HIV rapid test results? If HIV and HCV antibodies tests are negative at 5 months, are HIV results accurate

Can HCV co-infection affect the accuracy of HIV rapid test results? If HIV and HCV antibodies tests are negative at 5 months, are HIV results accurate

It shouldn't: Antibody tests are specific for the antibodies being tested for, so hcv antibodies shouldn't have an effect on HIV antibody tests. If you've tested negative at 5 months, I don't see why those results wouldn't be accurate, but if you want to be sure, you can always wait another 4-6 months and have the HIV test repeated. ...Read more

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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.

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

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What is the accuracy of HIV 1 & HIV 2 antibody screening test's result after 6 weeks from possible exposure? Thank you :)

What is the accuracy of HIV 1 & HIV 2 antibody screening test's result after 6 weeks from possible exposure? Thank you :)

Exposure: If positive the testing is accurate. The natural history of the disease can be that many people will not be positive up to 12 weeks after the exposure and some even 6 months. ...Read more

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Does hcv coinfection expand only window period for antibody tests of hiv? Or does it have any affection to window period or accuracy of hiv pcr test?

Worse outcome: Coinfection with Hep C and HIV is worse than either infection alone. Window period is a minor issue compared to severity of disease. Window period can be addressed by nucleic acid tests rather than relying in antibodies. ...Read more

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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

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

No: Prednisone is the average dose will not affect any of the tests. Potentially massive doses (over 60 mg) taken for many months may marginally affect the tests but the difference will likely be unimportant. ...Read more

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Is a four week negative HIV antibody test / negative PCR test reliable?

HIV diagnosis: Antibody titers have been reported to be delayed as long as six months, but this is very unusual. A negative pcr for viral RNA is virtually determinative of the absence of infection. ...Read more

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What is the accuracy of p24 antigen and antibody HIV testing 4-6 weeks post PEP testing? For something incredibly minor, would this be reliable?

What is the accuracy of p24 antigen and antibody HIV testing 4-6 weeks post PEP testing? For something incredibly minor, would this be reliable?

HIV nucleic acid: The antigen antibody combo tests are quite good. But you should repeat the test at three months. At three months, if you get a HIV nucleic acid test and that is negative, you will more sure of the result. ...Read more

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How does an HIV antibody test work?

HIV testing: All HIV tests used in the U.S. Detect hiv-1, and some tests have been developed that can also detect hiv-2. (hiv-1 is common in the United States; hiv-2 common in parts of africa.) combination tests have been developed that detect HIV antibody and the HIV antigen called the p24 antigen. Levels of p24 antigen are typically high early in the course of infection and is positive earlier. ...Read more

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Can you tell me more about HIV antibody test?

Can you tell me more about HIV antibody test?

Sandwich assay...yum: Elisa = enzyme-linked immuno sorbent assay. Done by adding serum from a subject to a plate w/antibody against the infection you're testing for on its surface. The antigen (or protein) from the infection binds to the antibody on the plate. Then another antibody to the infection w/color signal chemical attached is added on top and binds to the antigen. If infection is there color can be measured. ...Read more

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How many different types of HIV antibody tests are there?

How many different types of HIV antibody tests are there?

Probably 4.: There are 4 known ways of testing for HIV and probably more being developed. Initial testing is by elisa (enzyme-linked immunosorbent assay), and if positive, confirmed by western blot or immunofluorescence assay (ifa). Less often, nucleic acid testing can help in diagnosis, but can be inconclusive due to insufficient sample, so another is collected and tested. ...Read more

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Can you tell me is a 22 week HIV antibody test conclusive?

Not exactly: A screening antibody test, if positive, needs to be confirmed. If the confirmatory test is positive it is conclusive. If negative, it may be because sometimes it takes more than six months for the antibody test to turn positive. You may wish to seek HIV nucleic acid test, if that is negative or positive, that would be conclusive. ...Read more

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How long does it take to get the results of a hiv-antibody test?

How long does it take to get the results of a hiv-antibody test?

Minutes to days: Anywhere from 20 minutes with a rapid test, to a few days with a standard test. (the number of days depends on the lab you're using and how often they run the test.). ...Read more

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Might it be that a a HIV antibody test detect after 10 months since exposure?

Might it be that a a HIV antibody test detect after 10 months since exposure?

Yes: If the antibody test is positive and is confirmed by western blot, it provides a definitive diagnosis of infection. A negative test may not rule out infection and it may be prudent to get test for HIV nucleic acid, to be certain. ...Read more

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Is a negative HIV antibody test taken 6 weeks after possible exposure conclusive?

Not necessarily.: Officially - the window period for HIV seroconversion (converting from a negative antibody to positive antibody test) can be up to 3 months. Most seroconversion should happen by 1 month but some can take up to three month. One option is to take a more sensitive test such as a HIV RNA (or viral load) test - this should pick up an infection after 2 weeks and would be conclusive at 6 weeks. ...Read more

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An HIV antibody test at 7 months is conclusive? Is there any need to test again at 1 year?

No: Unless you have exposure in the interim. If you often have unprotected sex, then you may need periodic testing. Thus prevention is essential. ...Read more

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I took a HIV antibody oral swap test and was negative, is that conclusive?! at 15 weeks.

HIV testing: Nope. It is likely you are not HIV positive with that results but it is not 100% at this point.

Remember there is better and more accurate testing. The HIV RNA test can be 100% accurate at 14 days post exposure. ...Read more

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HIV negative following antibody test at 5 weeks post (potential) exposure of unknown status. Can I relax?

Not yet: You may get a HIV nucleic acid test in another 6 weeks, if that is negative, you can relax. Antibody tests should be repeated at 3 months, 6 months and a year after exposure. ...Read more

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Would 2 years from possible exposure be long enough to have a HIV antibody test done? Would it be accurate?

Way long: If you've been tormented by the fear of HIV for two years, then you have my sympathy. Your test will be accurate. If you have any further doubts, you can get a pcr. Good luck and I hope you are healthy. ...Read more

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When should some one be considered Hiv Negative after exposure when antibody only and Duo combo tests used?

Depends: Antibody tests are positive in most infected people by about three months after exposure. In a small number the test may not turn positive for a year. Combo test is more reliable and at about 6 months after exposure, a negative result should rule out HIV. However, the best test is for HIV nucleic acid, if it is negative at three months after exposure that would rule out HIV. ...Read more

Dr. Ed Friedlander
1,495 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


Antibody (Definition)

An antibody is a protein the body's immune system makes to identify potentially harmful substances in the body. Antibodies attach to the substance on a molecular level and mark it so the immune ...Read more