Human Herpesvirus 7 (HHV-7) Antibody (IgG), 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 IgG antibodies to HHV-7 and reports the result as a titer, the highest dilution of your serum at which antibodies are still detected. A positive IgG result indicates past infection, which is expected in most adults. A significant rise in titer between two samples taken a few weeks apart can suggest recent infection or reactivation. 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.