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Why pcr false positives

Premium Questions

doctor1 MD

I was recently diagnosed as HIV positive however my RNA Real Time PCR results came back ... a false positive as I have confirmed a western blot test was NOT used to confirm the ELISA. ...

doctor1 MD

My wife aged 43 recently tested positive to urine PCR Chlamydia. Her Urinalysis showed no WBC or pus. Our GP said the PCR could be a false positive since the urine WBC was negative. Do you agree ...

doctor1 MD

and the ultra sound . I have heard there can be false positive in these test. On the radiorogist report he ... at times. Why would a radiologist put this on his report. Could this be a motivation on his part to get ...

doctor1 MD

are the hiv pcr rna test still producing false positives like they were a few years ago? ...

doctor1 MD

Hi, I just had a false positive for alprazolam and can't figure out why other than dirty glassware ... of these caused a false positive as I don't take alprazolam. ...

Public Forum Discussions

doctor1 MD

, so now i m having a PCR-test done. I ve been looking online and there really isn t a lot ... is the chance if this test comes out negative, that it is a false negative? Most say that you should do another ...

doctor1 MD

before/ just after xmas. I have just taken a pregnancy test which has come up positive I wa wondering I either if these medications could cause a false positive as I have severe PCOS, adenomiosis ...

doctor1 MD

and a + Rheumatoid factor. So he then ordered a HBsAg and it came back positive - but the PCR came back negative. Now he has ordered an anti-HBc and PCR quant. What would these tests indicate? I have had some joint pain ...

doctor1 MD

had 14 random drug UAs and on one test it showed up positive for opiate. It had set back my sobriety date back. I want to challange the test but i dont understand why on this one false positive test ...

doctor1 MD

by cross-reactions.we therefore recommend to perform quantitative hepatitis c PCR testing.) a few days later the QUANTITATIVE PCR was performed the result was negative , plz help me to explain what happened ...

doctor1 MD

, and on and off cramps but negative HPT. Could I still be pregnant and if so why is the test negative? ...

doctor1 MD

.that time i was confused am i pregnant? then suddenly i am getting periods. why it is happening dr. can u ...

doctor1 MD

is a negative hiv dna pcr test at 26 days a good indicator. during the test i was experiencing what i felt as are symptoms. if they truly were are symptoms would that test show up positive ...

doctor1 MD

What is the chance of a false negative HIV result on a PCR-test after 50 days and why is it not a commonly used test? ...

doctor1 MD

taken 400 mg. daily ever since. I asked a new Dr. to do a PCR test that came back not detected ...

Mobile Questions and Answers

doctor1 MD

Hi It is 92% sensitive and 99.9% specific. It means that one of every 12 results will be false negative and one of every 5000 results will be false positive. RNA-PCR or DNA-PCR gives better accuracy during the latency period.

doctor1 MD

you should check exactly after a minute to avoid false positives. regards

doctor1 MD

hello dear This test has a window period of 2-3 weeks and has an accuracy of 99.6% after that, although guidelines still suggest testing at 12 weeks with a regular antibody for conclusive results. still positive in antibody test you have take final confirmatory test that is western blot test regar5ds