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Can I Take PCR test on my 15th day after exposure?

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Can I Take PCR test on my 15th day after exposure will i get accurate results?
some people are saying that PCR test gives accurate result only after 28 days is it true.
If I take test after 15 days after exposure is the result will be valid or not?


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replied April 22nd, 2011
HIV and AIDS Answer A22234
Hello and welcome to E health forum.

Polymerase chain reaction (PCR) for proviral DNA (PCR -DNA) can detect proviral DNA during window period, can differentiate latent HIV infection from active viral transcription and can quantitate the copy number of HIV DNA when used with external standards (e.g. viral load assays).

PCR can successfully differentiate between HIV- and HIV-2 infections. Proviral DNA can be detected in peripheral blood mononuclear cells before seroconversion. PCR is also be used to detect HIV infection in neonates born to HIV infected mothers.

The sensitivity of the test is 100% and is very accurate test. You can rely on it.

A proviral DNA PCR - at 3-4 weeks post exposure - is definitely confirmatory. (Although the earliest results can be available within 7-10 days of exposure).

I hope this helps.



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