Human Herpesvirus 7 (HHV-7) Antibody (IgM), Titer details

Human herpesvirus 7 (HHV-7) is a very common virus that most people catch in early childhood, often without noticeable illness, and it then stays dormant in the body for life. This test uses immunofluorescence to measure IgM antibodies to HHV-7 and reports the result as a titer, the highest dilution of your serum at which antibodies are still detected. IgM antibodies are usually made early in an infection, so a positive result can suggest a recent primary infection or a reactivation, while a negative result makes a recent infection less likely. HHV-7 antibodies can cross-react with the closely related HHV-6, so results are interpreted alongside the paired IgG or IgM result, HHV-6 testing and your symptoms.