Top 20 Doctor insights on: Elisa test for hiv results

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My ELISA HIV test came up negative after 1month exposure. How accurate is this test?

My ELISA HIV test came up negative after 1month exposure. How accurate is this test?

90%: There's a period of time after a person is infected during which they won't test positive. This is called the “hiv window period.”

The window period can be from 9 days to 3-6 months, depending on the person's body and on the HIV-test that's used. ...Read more

Dr. Al Hegab
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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If an ELISA HIV test is negetive at two months.... What are the chances of the result being negetive after three months test?

If an ELISA HIV test is negetive at two months.... What are the chances of the result being negetive after three months test?

HIV Testing: There is absolutely no correct answer to your question. I know you are asking this over and over. Are you hoping for a different answer? Since you continue to ask about the HIV antibody testing there is no right answer. But, by three months the majority of those who are positive will test positive. I do not think there are verifiable statistics for sixty days. ...Read more

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I did an ELISA HIV test at 80 days mark. The result was negetive. How reliable is it? Can I be free f fears? Can 10 days differences make difference?

I did an ELISA HIV test at 80 days mark. The result was negetive. How reliable is it? Can I be free f fears? Can 10 days differences make difference?

HIV is hard to get: I always worry when I hear of the prolonged length of time people getting poor health care are worrying about things they do not need to worry about. If you really feel you got exposed to HIV you must get the HIV RNA viral test. This will be 100% accurate from 21 days after the exposure. Any physician prolonging your agony is not serving you well. ...Read more

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Hw reliable is the elfa test for hiv. I hv done it after 4 years zat I had unprotected sex. My result is non reactive for hiv. Is ELISA and elfa z same?

Hw reliable is the elfa test for hiv. I hv done it after 4 years zat I had unprotected sex. My result is non reactive for hiv. Is ELISA and elfa z same?

Likely negative: I'm not familiar with elfa. I thing you mean enzyme-linked immunosorbent assay (elisa) is a test that uses antibodies and color change to identify a substance. Namely HIV antibodies in your blood. It is very very accurate. After 4 years I can say with 100% confidence you do not have it. ...Read more

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Been tested by the standard Elisa HIV test at the doctors at three months, with results coming back normal. Should I feel paranoid or relax now?

Relax and retest: You may ask your doctor for a HIV nucleic acid test, if that is negative at 3 months after exposure, you are essentially free from HIV. ELISA test should be repeated periodically to one year after exposure. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, low fat milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form.
Practice safe sex. ...Read more

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Does a false positive ELISA HIV test mean someone has a autoimmune disease? Or could it be anything? Do people find out why they get these results?

No: While false positives can be from nothing specific, they can be related to infections from other viruses that may make similar antibodies that can react with elisas, but this has to be confirmed with western blot. I personally would ask for two confirmations as it can take up to six weeks for viral levels to be high enough to be sure with the test. Check with infectious disease doc to be safe. ...Read more

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Wht cause a false pos ELISA HIV test with neg naat and western blot? 2 neg oral fluid rapid results. After 1 year exposur. Ihave autoimmune hypotyroid

Wht cause a false pos ELISA HIV test with neg naat and western blot? 2 neg oral fluid rapid results. After 1 year exposur. Ihave autoimmune hypotyroid

No answer: Please. How many times are you going to ask the same question. There is no right answer here. Your body has something triggering the simple HIV antibody test to be positive. It is not HIV causing this symptom. In the future you should avoid these tests and get the better test. You have been given this answer numerous times. It is time to move on. ...Read more

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Does post exposure prophylaxis (1 month ZDV+3TC) for HIV effect the results of a rapid kit HIV test or ELISA for Hiv test?

PEP: It is too soon to do an antibody test at one month post exposure. But, no these tests would not be affected by the medication. Two weeks after PEP one should have the RNA test. ...Read more

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If we are to put a % figure, how accurate will be 4th gen ELISA test for HIV after lets say 4 weeks, then 6 weeks and then 8 weeks?

If we are to put a % figure, how accurate will be 4th gen ELISA test for HIV after lets say 4 weeks, then 6 weeks and then 8 weeks?

Why do you ask?: If you are this worried, then you should be willing to ask your physician for a pcr / nucleic acid assay for HIV instead. The modest price you'll probably end up having to pay is nothing compared with the peace of mind it'll bring you. Afterwards, get with your physician ; get some guidance about your generalized health anxiety -- you know you'll benefit from this also. ...Read more

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What is the difference between elfa and ELISA test for hiv. Are both of them accurate, lest say testing after 1 year of risky behaviour?

What is the difference between elfa and ELISA test for hiv. Are both of them accurate, lest say testing after 1 year of risky behaviour?

ELISA - initial test: Enzyme-linked immunosorbent asay (elisa) is the first one used to detect infection with hiv; if positive, it should be repeated for confirmation. Likelihood of the test being false after 1-3 months of exposure very unlikely. Enzyme linked fluouresecent assay (elfa) is a slightly newer but very similar test, but may detect HIV antibodies somewhat earlier (95% in 28 days, essentially 100% in 90 days. ...Read more

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Is ELISA test for HIV 1 & 2 antibodies conclusive after 8-9 weeks of exposure? Does NON-REACTIVE mean NEGATIVE?

ELISA for HIV: The ELISA test is not conclusive after any amount of time. The ELISA is a screening test and if it comes back positive, a Western blot will need to be done. Non-reactive is a good thing to be and it does mean that you are negative for HIV virus. Although there is a window period when you can have the HIV virus but still have a nonreactive result. Another test may be needed in that case. Suerte ...Read more

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Hi doctor. Is eli a more developed ELISA test for HIV? And is ecl a western blot test? (if yes for ecl) I had a negative p24 at 3 month am I negative

Hi doctor. Is eli a more developed ELISA test for HIV? And is ecl a western blot test? (if yes for ecl) I had a negative p24 at 3 month am I negative

Not Best Focus-Vague: Acronyms are too vague & not clear. However, the bigger issue is attributing too much significance to any specific test, all of which have issues of both false positives & negatives, never perfect. The larger issues are both probability, look up "bayes' theorem" & the many variables/complexity of exposure combined with individual responses over time. Before >6 months, reliability of HIV tests low. ...Read more

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My brother had a positive ELISA test for HIV followed by an indeterminate western blot. His viral load detected no virus. How confident should I be?

Pretty confident: It sounds like's he's negative and just happens to have an indeterminate wb. This happens sometimes, for reasons that are never entirely explained. However, I would recommend that he get the elisa and western blot retested one month after the first. If there has been no progression of the WB (addition of new bands), then he's definitely negative. ...Read more

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Does ELISA HIV test detect type o or other type of hiv?

HIV screening: An ELISA is often done as an initial HIV screening test. It is designed to have high sensitivity for most types of HIV in the gene real population, but does have some false positives. That being said, there are some types of HIV, e.g. type O, that are unusual outside of Cameroon or West Africa, but are not recognized by usual antibody tests. Check with an I.D. specialist for your area and test. ...Read more

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My ELISA HIV test came up negative after 1month exposure. How accurate is this test?

90%: There's a period of time after a person is infected during which they won't test positive. This is called the “hiv window period.”

The window period can be from 9 days to 3-6 months, depending on the person's body and on the HIV-test that's used. ...Read more

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What do you suggest if my ELISA HIV test came up negative after 1month exposure. Is this accurate?

HIV testing: No. It is not accurate in any way. It is completely invalid as a test this close to the exposure and an inappropriate test to order for a one time exposure that close to the incident. The only accurate test one month after exposure to HIV is the HIV RNA Test. ...Read more

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Can healthy people get false positive ELISA HIV test? If so why?

Yes, it is possible: Some people may have a biologically false-positive test for hiv, when tested by elisa. Such people usually have a negative or indeterminate confirmatory test, the western blot. That usually happens because of some antibodies that were directed against other organisms recognizing part of hiv. If there is any question, a qualitative HIV dna pcr may put the question to rest. ...Read more

Dr. Dominic Riganotti
376 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
1,487 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