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Herpes Simplex 1 IgM (HSV-1)

HSV-1 IgM is a blood test used to detect the presence of IgM antibodies to herpes simplex virus type 1 (HSV-1), which is a common viral infection that causes cold sores or fever blisters around the mouth and lips. IgM antibodies are the first antibodies produced by the immune system in response to an infection, and are typically detectable within a few days to a few weeks of initial exposure. The HSV-1 IgM test is used to diagnose recent or current infections with this virus. The presence of HSV-1 IgM antibodies suggests that a person has been recently infected with the virus, and may still be actively fighting the infection. However, it is important to note that HSV-1 IgM antibodies may also be present in individuals with reactivated HSV-1 infections or in those with previous infections who have a weakened immune system. HSV-1 IgM testing may be ordered for individuals with symptoms of a recent or active HSV-1 infection, or for those who have a weakened immune system and are at increased risk for complications from the infection. It may also be ordered as part of routine screening for sexually transmitted infections.

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