Herpes 1 IgG (IFA)

Sample: Serum

Schedule: Daily, Immunofluorescence (IFA)

Units: Titer

Range: A positive IgG titer means past infection anywhere in the past.

Remarks: Primary HSV (Herpes Simplex virus) infection produces a classical antibody rising titer. HSV test is most useful after the 4th day of ilness in herpes encephalitis. About 90% of adults have positive HSV IgG test while a fourfold increase in the IgM titer may indicate recent HSV infection. There is an increased cross reaction of HSV-1 and HSV-2 responce. HSV-2 is most common in genital viral infections and HSV-1 in non-genital infections.

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