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How Long Does An Hiv Pcr Dna Test Take

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AIDS InfoNet

Viral Load Tests

...freezers and shipping. How Is the Test Used? The viral load test is helpful in several areas: For medical researchers , the test proved that HIV is never "latent" but is always multiplying. Many people with no symptoms of AIDS and high CD4 cell counts also had high viral loads. If the virus was latent, the test wouldn't have found any HIV in the blood. The test can be used for diagnosis , because it can detect a viral load a few days...
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
...Shortly after an exposure the HIV ab test may not have time to turn positive. Usually the earliest would be by 2 weeks and most will be positive by 6 weeks. Read more »

DNA PCR effective for how long?

Dear Dr Conway- I've read that toward late stage HIV disease, antibody tests become less effective. Is the DNA PCR the most useful test at that point? Also, does the average DNA PCR test look for all subtypes of HIV1, or does it have certain...
Brian Conway, M.D.

Response from Brian Conway, M.D.

University of British Columbia
...The DNA PCR kit is extremely sensitive and will detect infected cells at all stages of infection, including during advanced AIDS. I detects all subtypes of HIV. There are certain individual strains that might not be detected due to genetic... Read more »

Quantification of PCR

Dear Dr.,I wonder if you could tell me what a PCR test quantifies in reality. Does it detects only the free virus in the blood, or does it shows also the amount of virus that is hosting the cells of the immunity system. Thanks, you're doing a great...
Mark Holodniy, M.D., F.A.C.P., C.I.C.

Response from Mark Holodniy, M.D., F.A.C.P., C.I.C.

Stanford University, School of Medicine
...Polymerase chain reaction, or PCR, is a molecular tool which can detect or semiquantitate any RNA or DNA sequence from microorganisms, animals, plants Read more »

Indeterminate HIV-2 Qualitative DNA PCR

Dear Dr. H - Can you help me with this please. My doctor recently had me take a HIV-2 Qualitative DNA PCR from SKB. I don't know why he ordered the PCR test because the potential exposure I was worried about was back in January 1999, and it wasn't...
Mark Holodniy, M.D., F.A.C.P., C.I.C.

Response from Mark Holodniy, M.D., F.A.C.P., C.I.C.

Stanford University, School of Medicine
...Good labs have internal controls to monitor the integrity of the samples and the integrity of the assays. Sometimes the PCR assays don't work, either because something was in the sample that caused the reaction to fail (ie wrong anticoagulant,... Read more »
Articles
New York State Department of Health AIDS Institute

Diagnostic, Monitoring and Resistance Laboratory Tests for HIV

...Assays 2. HIV-1 Confirmatory Antibody Assays 3. HIV-2 Antibody Screening B. Viral Identification Assays 1. DNA Polymerase Chain Reaction (DNA-PCR) 2. Plasma HIV RNA Assays III. Monitoring Tests A. Lymphocyte Analysis ... Read more »
San Francisco AIDS Foundation

Viral Load Testing

...the branched-chain DNA test ( bDNA ), is made by a company called Chiron (pronounced "KAI-ron"). The reverse transcriptase polymerase chain reaction or RT-PCR (commonly called the PCR ) test is made by Roche (pronounced "RO-sh").... Read more »
The Well Project

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

...Viral Load Test Viral load is the amount 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... Read more »
The Well Project

Women and HIV Viral Load

...of HIV, the greater the risk of your immune system 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... Read more »
Connect With Others

Reliability of PCR test

Posted by tb75, 2 Replies
...I was hoping that someone could attest to the reliability of the HIV PCR test at 3 weeks. I got tested at 22 days and it was negative, but I have seen conflicting reports as to the ability for Read more »

HIV tests that detect the genetic material of HIV

Posted by nomoreworry4me
...tests that detect the genetic material of HIV itself (rather than antibodies or antigens) are known as PCR tests. PCR stands for Polymerase Chain Reaction and is a common way of testing for a variety of different organisms. The overall process of... Read more »

ALL THE HIV TESTS TO CHECK FOR HIV

Posted by nomoreworry4me
...tests that detect the genetic material of HIV itself (rather than antibodies or antigens) are known as PCR tests. PCR stands for Polymerase Chain Reaction and is a common way of testing for a variety of different organisms. The overall process of... Read more »

HIV?

Posted by Anonymous
...http://www.acponline.org/journals/annals/15apr98/biohiv.htm. ?We observed that clade A strains [of HIV] were not detected by RT-PCR [Reverse Transcriptase-Polymerase Chain Reaction] and that clade G-strains were not detected by NASBA [Nucleic... Read more »