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I had an HIV DNA test done today on Sep 20th. My possible expose was unprotected penile-vaginal sex on Sep 3, 2011. I was the male. My question is will having another viral infection that causes flu like symptoms besides HIV cause a False-Positive result? I have had some sort of sinus infection for the past couple days. My doctor believes it to be viral.
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PCR DNA test are unapproved diagnostic tests for HIV.
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No it will not cause a false positive. But the DNA test has a high rate of false positives so if you come back positive you need to confirm with the standard Elias three months after initial possible HIV exposure. If the PCR DNA is negative you are likely in the clear, but to be sure need to still test three months after the exposure to be certain.
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Your post is incorrect. PCR-DNA tests are known for false positives.
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Teak is not that what togoodhealth said? After doing my own research on Medhelp I found a very well and detailed explanation via Dr. Jose Gonzalez-Garcia. I listed it below just in case you both would like to reread. I understand that the DNA PCR test is not 100% accurate, however my question is to both of you if you actually know the rate of accuracy of this test. I cant find that information anywhere. Besides that I fully understand that the test is not a diagnostic test but rather a test only to find any sort of genetic HIV material within a sample. And although this information is not listed I would also like to add that this is the test that nearly all health care workers use after a needle prick.

- Testing for HIV 7 days after exposure

Preliminary diagnosis of very early HIV and Hepatitis C disease is now possible at
7 days post possible exposure. This time frame was previously unavailable but utilisation of standard routine technology in a novel diagnostic style will facilitate very early diagnosis. The technique has had most application so far in terms of screening the human blood supply from blood donors and has reduced the numbers of inadvertent contamination with HIV and Hepatitis C virus very considerably. The technique is also employed in organ donation settings where organs to be donated are screened for the HIV-1, HIV-2,Hepatitis C and Hepatitis B viruses.

Thinking laterally and working with The Doctors Laboratory ( a major global referral laboratory in London and CPA, UKNEQUAS, WEQAS, ISFG and EMON approved for quality, robustness and high standards), we have collaborated to apply the blood and tissue screening, ultra-high sensitive technique to beginning the diagnostic process for the
diseases identified.

The ultra-fast diagnostic technique utilises a fully automated system made by Roche and the testing method
uses polymerase chain reaction (PCR) or NAT (Nucleic Acid Amplification) to
detect miniscule amounts of viral (and the technique can be applied to bacteria) genetic material.

The process works as follows. We take a measured amount of blood sufficient to run the three NAT tests for HIV-1 and HIV-2; Hepatitis C virus and Hepatitis B virus. We can also include syphilis IgG and IgM within that screen. The test is performed using the Roche platform and runs on the "sample in, results out" technique
which reduces chances of contamination of product etc to zero. Should a positive sample be produced the whole specimen is drilled down to identify the virus producing the positive result and further confirmatory tests are performed.

The outcome is a highly sensitive, highly accurate detection methodology for detection of the identifed viruses. The turnaround time is swift, taking a maximum of 4 days
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Move on.
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