Home » Frequently asked Questions on Health » Is a DNA PCR test reliable for HIV testing?

Is a DNA PCR test reliable for HIV testing?

Q: Is a negative result obtained from a HIV DNA PCR test result, wherein the sample is given 72 hours post exposure, a true & conclusive negative? What is the right time to give a sample for HIV testing after suspected exposure?

A:No. The HIV RNA appears in blood around 15 days post exposure depending upon the replication profile of the virus strain. Therefore, blood samples should be tested regularly after exposure: 2 weeks; 4 weeks; 6 weeks; 8 weeks; 10 weeks and 12 weeks. Samples should be tested for the presence of HIV proviral DNA in the peripheral blood lymphocytes by polymerase chain reaction, particularly Real-time PCR assay from an accredited laboratory. Looking for HIV RNA in plasma during window period is less sensitive. Samples collected after 6 weeks post-exposure should first be tested for the presence of HIV antibodies. If positive, it will indicate HIV infection.

RELATED FAQ

................... Advertisement ...................

................... Advertisement ...................

FAQ

ASK OUR EXPERTS

Using 0 of 1024 Possible characters
Choose Topic

................... Advertisement ...................

-------------------------------- Advertisement -----------------------------------