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How long for the results of PCR testing?

Posted by Anonymous, 1 Reply
Can anybody who went through PCR testing tell us how long it takes to get the results? I heard that the tests are only done in CA, so people from other states (I'm from TX) would probably have to wait longer. Thanks a lot.

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Got back my RNA PCR results, just a question.

Posted by nin1992
Alright so my results came back and it was negative(didn't test for antibodies as it was too early) and I just want to know, will the RNA PCR detect the virus at 9 days?(day I tested after possible exposure)

I got vaccinated for Hep B today and I was... Read more »

PCR Referral

Posted by Anonymous
Can anyone give me a number to a few labs that offer PCR DNA tests. Also, how long does it take to get results back? What are the chances of a false positive? Thanks

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Posted by Anonymous, 2 Replies
I had a PCR test at least three weeks ago, and have not heard back from my Doc. How long does the PCR test take? Could my Dr be waiting for me to call him to tell me the bad news. I had a real exposure (not presumed) to HIV several times and am... Read more »

PCR test results soon!

Posted by Anonymous
I should be getting my PCR test result here in a couple of hours...wish me luck. I will let you all know as soon as I find out. My three month test was neg....this will tell all. Please pray for me!

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Ask the Experts

PCR results Q from prior post

Your reply stated if PCR testing was positive , you were infected. Well, the doctor, an OB/GYN, did not even know how or what to order for me (?) and she had to confer with an infectious disease doc and he told her what to order me for exposure 3...
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
Some definitions are in order first. Polymerase chain reaction (PCR) is a molecular diagnositic assay that can be used for a variety of things. It is not specific for HIV. HIV PCR comes in 2 flavors, DNA PCR, which measures HIV in cells, and RNA PCR... Read more »

After Negative PCR RNA - further testing wtih PCR DNA?

Dr. HolodniyLike many others who have written to you. I too am attempting to determine if I have been exposed to HIV prior to seroconversion. My primary motivation is to start early treatment if infection exists since early studies for treatment...
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
We don't have enough information yet to definitively answer your question. If infection were present and suppressed by therapy, then 1.5 weeks after stopping therapy should be long enough to see a detectable viral load (RNA). That conclusion is... Read more »


I have results from a PBMC culture of one copy per 1,000,000 cells and my RNA PCR is less than 100 copies per ml. My DNA PCR is not back. I have been told that the TCID is still present but I do not see or understand this term but that the...
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
TCID is an abbreviation for tissue culture infectious dose. This is a calculated number which indicates the number of infectious HIV viral particles present in a test tube assay. Briefly, someone took 1M of your cells and incubated them with some... Read more »

Please help me Dr. Bob, please PCR/PEP (PCR TESTING WHILE TAKING PEP)

Dear Dr. Bob,First of all i just want to give you my deepest respect and thanx for this great service. You are an amazing person and an inspiration to me. I have spent a lot of time on this site in the last month...Why... Dr. Bob, (long story short)...
Robert J. Frascino, M.D.

Response from Robert J. Frascino, M.D.

The Robert James Frascino AIDS Foundation
Hello,Yes, PEP (post-exposure prophylaxis) can affect PCR test results. PEP is a combination of antiretroviral drugs used in exactly the same dosage that we use to treat active HIV infection. Therefore, these drugs can inhibit HIV replication and... Read more »
HIV i-Base

Monthly Injection Protects Macaques From Rectal Exposure: Results Should Fast-Track Human Studies for Advanced PrEP Options

Probably, the most important prevention study at CROI 2013 came from a study in 16 macaque monkeys. Half these animals were given a long-acting formulation of an integrase inhibitor and all were protected from SHIV infection, following multiple... Read more »
Canadian AIDS Treatment Information Exchange

Raltegravir: Long-Term Results

Knowledge about the long-term safety and effectiveness of potent combination HIV therapy (commonly called ART or HAART) is essential particularly if HIV-positive people are expected to take these medicines for the rest of their life. As mentioned... Read more »
U.S. Centers for Disease Control and Prevention

Using Culturally Sensitive Media Messages to Reduce HIV-Associated Sexual Behavior in High-Risk African-American Adolescents: Results From a Randomized Trial

The current study sought "to test the long-term effects of a mass media intervention that used culturally and developmentally appropriate messages to enhance [HIV]-preventive beliefs and behavior of high-risk African-American adolescents." Radio... Read more »
HIV i-Base

Viral Load Rebound Rate of 35% Using Ritonavir-Boosted PI Monotherapy: Results of 5-Year PIVOT Study

A long-term strategy study sponsored by the Medical Research Council (MRC) in the UK reported low rates of serious complications and the potential to reduce drug costs. However, more than a third of people on the ritonavir-boosted PI monotherapy... Read more »