Cytomegalovirus (CMV) is a herpesvirus DNA virus. Also known as cell inclusion body viruses, the infected cells are swollen and have large intranuclear inclusion bodies. CMV has a typical herpesvirus morphology, and its DNA structure is also similar to HSV, but 5% larger. The detection of lgM antibody and lgG antibody by ELISA is suitable for early infection and epidemiological investigation. IgG antibodies persist throughout life, and lgM antibodies are associated with acute infections.