Hi Ethan,
I'm not a health professional and I don't pretend to understand the IgG or IgM tests completely, but I'll relay what information I was able to collect from various sites. They are both antibodies produced when the body fights off the HSV viruses. The IgM canNOT be distinguished between types and tests for it are therefore considered pretty useless. Tests for IgG CAN detect between HSV-1 and HSV-2 antibodies and are therefore the ones to get.
I think which tests are available depends on the lab, as some labs will stock the kits of some but possibly not others. Even your doctor might not know which is available at a given lab, so if you have a particular one in mind you should probably check with the lab first and then find out if the doc has what s/he needs.
I understand that the "gold standard" of blood tests is the Western Blot, which can be rather expensive if you're paying out of pocket for it, but it's considered the most accurate. There is also the HerpeSelect tests -- the ELISA Kit tests for one OR the other type, and the Immunoblot Kit tests for both. HerpeSelect is apparently cheaper and just as accurate as the WB for HSV-2 testing.
You should be aware that it can take as long as 12-16 weeks after initial infection for enough antibodies to accumulate to be detected by any blood test. So if you test negative before that time span, there is still a chance you could have it and you should get another test after the 16 week period to be sure. However, a positive result means you do have it.
Hope that helps. Good luck! Let us know how you make out.
TheOneInFour
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