How Accurate Is Dna Testing In Hiv

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Ask the Experts

HIV-1 DNA by PCR test and HIV-1 Abs test

Hi, I took the tests above on the 36th day after exposure. Both tests came negative, (I'm not in any med, never tested positive)However, I'm wondering how accurate these results are? Should I repeat the tests, when? What was the posibility of...
Joseph McGowan, M.D., F.A.C.P.

Response from Joseph McGowan, M.D., F.A.C.P.

North Shore University Hospital
...not have time to turn positive. Usually the earliest would be by 2 weeks and most will be positive by 6 weeks. We repeat the testing for 3 months to be sure to catch all positives.The HIV PCR test should be positive by day 36, usually at a high... Read more »


Having a sex contact with a sexs worker(-protected vaginal-unprotected oral) and because of my... Read more »

HIV 1 DNA, Qualitative/PCR testing results

hi DR.Roberti'm 28yo and I have 3 questions about HIV1 DNA Qulaitative/PCR test results1)is this... Read more »
AIDS InfoNet

Viral Load Tests

...virus. The markers are measured and used to calculate the amount of virus. Roche and Abbott produce this type of test. The bDNA ( b ranched DNA ) method combines a material that gives off light with the sample. This material connects with the... Read more »
The Well Project

Women and HIV Viral Load

...being damaged. Viral load can be measured by two different lab tests: a polymerase chain reaction (PCR) test or a branched DNA (bDNA) test. Both tests are accurate, but each has a different way to measure the amount of virus. It is best to stick... Read more »
The Well Project

Understanding HIV-Related Lab Tests II: Viral Load, Resistance and Tropism

...of HIV in your bloodstream. Viral loadcan be measured by two different lab tests: polymerase chain reaction (PCR) orbranched DNA (bDNA). It is best to stick with the same kind of test and notswitch between the two or it will be difficult to... Read more »

Seeing an HIV Doctor

...controlling the virus. The two viral load tests commonly used for HIV are: HIV RNA amplification (RT-PCR) test Branched chain DNA (bDNA) test Drug resistance testing -- Drug resistance testing determines if an individual's HIV strain is... Read more »