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PCR tests
I'm just curious as to how accurate PCR swab tests are? my GP says that it is easier to diagnose a herpes infection either genital or oral using swabs on a sore. If I had a blister/sore/ulcer looking thing that has a clear liquidy surface would that suffice for a PCR swab? how long does it have to be done after the sore bursts open or becomes a blister/sore/ulcer for it to be a valid result?

If the GP was able to get liquid from the sores surface onto the cottonbud end would that be sufficient regardless of time passed?
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No one has any info or comments? :(
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Your GP is right about swabbing a blister being the best way to diagnose HSV.  A "positive" swab is conclusive.  Unlike blood-testing, where a positive value (IgG) of between 1.1 - 3.5 is actually a negative reading 50% of the time, assuming that the testing was taken 3-4 months after the last possible exposure to the virus.

The experts I have followed on this recommend getting swabbed within 48 hours of the appearance of a blister for accurate swab results.  Getting liquied may be sufficient for testing purposes; but, I have yet to read anyone saying that specifically.
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