How reliable is a HIV ELISA test vs a western blot?

HIV testing. Elisa assay is quite sensitive (will detect antibodies best) but the western blot is more specific and confirm the results of the elisa if it was positive, as being either truly positive or false-positive. There are several other circumstances in which conditions other than HIV will produce a positive elisa assay. If there are symptoms and too early for antibody test, then PCR for RNA is best.

Related Questions

Is an HIV ELISA test always done with an western blot test?

No. In general, the elisa is done first, and the lab then does a western blot if the elisa is positive. However, it is possible to order just the western blot, in which case the elisa usually isn't done.

I just read that they do a confirmatory test called a western blot after the ELISA HIV test. Why?

Confirm the results. Hiv elisa test is a screening test and has a few false positive resuilts. Western blot test looks for and confirms that HIV genetic material is in the sample.

2 false pos ELISA HIV tests, all 1 1/2 years post exposure. Neg western blot, ifa, naat and 2 neg oraquick home tests. What is my HIV status? Help!

Likely negative. There is typically a "window" of 3-6 months after exposure where you could be HIV positive but test negative. Since you didn't get your testing until well after that, i'd say the confirmatory tests (western blot, ifa) are what you should go by. The elisa is very sensitive and can have false positives- that's why we rely on the confirmatory tests. I would consider your status to be negative.

False pos ELISA HIV tests, neg naat viral load test, neg western blot, ifa and oraquicks neg too. All 15 months post risk event. What should I do?

Be grateful, man! You've been obsessing about this too long. Sit down and talk with your physician about fears. If you'll forgive my frankness, talk with him/her and some wise adults (maybe even dad) about your emerging sexuality and how you've explored. By your age, we've all made mistakes. Embrace being a man, decide how you want love to be for you, and cherish adult love while resolving to be safe ; kind.

HIV, Elisa + january to july. WB New Lav Blot - in march. Cobas Taqman RNA - in march. Rapid tests for Ab - jan-jul, Geenius Confirmatory assay - july?

HIV. I am not sure if I understand your question correctly. But if you have a positive HIV Elisa and a Positive HIV WB, you have confirmed HIV infection. You will need to see an HIV specialist for treatment consideration. I hope that helps.