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Doctor insights on: Herpes False Positive

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Are false positive herpes test likely?

Are false positive herpes test likely?

No: A positive antibody means you're infected with herpes. That doesn't mean you're developing outrbreaks, but it does mean that you at least have latent herpes somewhere in your body. A positive culture or pcr for herpes means you have an active lesion. ...Read more

Herpes (Definition)

There are different types of herpes infections; herpes simplex infection of mouth (gingivostomatitis) and lips (labialis) are the most common. Others include genital herpes, and herpes zoster. Herpes infection could very mild to very dangerous depending on the type and location of the body affected. I ...Read more


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Can you get a false positive herpes test?

Can you get a false positive herpes test?

Yes: It's not uncommon for people who never show herpes i or ii lesions to have antibodies. Whether this means they ever met the virus at all is unknown. ...Read more

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Is it possible to have a false positive herpes test?

Is it possible to have a false positive herpes test?

Yes: Always remember never say always or never. Certainly labs can accidentally mishandle a specimen. A culture, if positive, is good evidence of hsv infection, however antibody testing is more difficult to interpret in some situations. ...Read more

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False positive herpes culture; what is the chance of it?

False positive herpes culture; what is the chance of it?

Fairly Small: Not too likely as a culture is the actual organism itself that was cultured from the patient's lesion in question. Unless it is a mislabeled specimen in the lab as an example. ...Read more

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Can herpes culture test be false positive? If so, now often?

Can herpes culture test be false positive?  If so, now often?

Unlikely: A false positive result would be extremely unusual. It would require either laboratory contamination or a clerical or technician error in which the result was reported for the wrong patient. I trust herpes culture results. ...Read more

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Can Valtrex (valacyclovir) trigger a false positive herpes test?

Can Valtrex (valacyclovir) trigger a false positive herpes test?

Herpes simplex: Depends upon the test to which you are referring. Valtrex (valacyclovir) may diminish the presence of virus in the skin or mucous membranes lesions and lessen the chances of a viral culture being positive, but will not in any way alter the antibody test on a blood specimen. ...Read more

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Is it possible to get a false positive herpes culture test? How often does it occur? What is the reasoning for it?

Is it possible to get a false positive herpes culture test? How often does it occur? What is the reasoning for it?

Rarely if ever: False positive results are very unlikely for HSV culture. If the test was actually a DNA test (PCR test), there is a slightly higher chance of false pos, but still very unlikely. If you have had a positive culture or PCR, for sure you have herpes at whatever site was tested (genital, oral). But if a blood antibody test, not culture or PCR, false positive results are quite common. Good luck. ...Read more

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Can you get a false positive herpes test if it's by swob? Should you get a blood test to know for a fact? And can folliculitis be mistaken for herpes?

Can you get a false positive herpes test if it's by swob? Should you get a blood test to know for a fact? And can folliculitis be mistaken for herpes?

False pos very rare: False positive tests for herpes simplex virus (HSV) (culture or PCR) are extremely rare and you probably don't need a blood test. However, a blood test still may be useful, e.g. to help tell new herpes from a recurrent outbreak, or if for some reason the virus type (HSV1 or 2) wasn't determined from the swab test. Folliculitis and herpes can be confused, but rarely by an experienced clinician. ...Read more

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Chances of having a false positive herpes type 1 blood test?9.1 igg.While other STDs remain negative 0.0 igg.Had my test 2 weeks later after exposure.

Chances of having a false positive herpes type 1 blood test?9.1 igg.While other STDs remain negative 0.0 igg.Had my test 2 weeks later after exposure.

Prob. True Positive: Herpes type 1 is the herpes virus commonly associated with the mouth (cold sores). It can be positive without any other tests being positive. Many people are + for hsv 1 by the time they enter school, picking up the virus from family members. Hsv symptoms may take 2-14 days after exposure to show up and longer for a positive test. You may need to be retested to be sure. ...Read more

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