The Cytomegalovirus (CMV) IgM Antibody test is used to detect recent or acute infection with cytomegalovirus (CMV) , a common virus in the herpesvirus family. The test measures the presence of IgM antibodies , which are produced by the immune system during the early stages of infection.

– Positive IgM : Indicates a recent or current CMV infection. It suggests that the person is in the acute phase of the infection and may be contagious.
– Negative IgM : Implies that there is no recent or active CMV infection , though the person could have had past exposure to CMV, as indicated by a positive IgG result.