Cytomegalovirus Antibody (CMV) ELISA IgM Assay system is an enzyme-linked immunosorbent assay (ELISA) designed for the presumptive qualitative detection of IgM antibody to CMV in human serum and for the presumptive diagnosis of acute, recent, or reactive CMV infection. To adequately assess the patient's serological status, testing should be performed in conjunction with any of the other traditional CMV diagnostic technologies.