title: Anti-human cytomegalovirus nuclear antigen antibodies of different immunoglobulin classes.
abstract: IgG, IgM and IgA immunoglobulin classes of antibodies to human cytomegalovirus nuclear antigens (CMNA) were studied by the acid-fixed nuclear binding technique (AFNB) and combined anti-complement immunofluorescence (combined ACIF). In acute cases of infectious mononucleosis (IM) of human cytomegalovirus (HCMV) origin and in the so-called double virus infections (HCMV + Epstein-Barr virus), anti-CMNA IgM antibodies were detected. They were absent from both anti-HCMV positive sera of healthy donors and sera of patients suffering of IM caused by EBV used as controls. The presence of anti-CMNA IgM may thus serve as an additional evidence of acute HCMV infection. Non-complement-fixing IgA classes of the anti-CMNA antibodies were not found in some of the sera gathered during the acute phase of IM of EBV origin: in one fourth of the HCMV seropositive donors and in a number of late serum samples. But non-complement-fixing and complement-fixing anti-CMNA components of the IgG class were detected.
mesh_terms: D000914:Antibodies, Viral / Q000276:immunology*; D000956:Antigens, Viral / Q000276:immunology; D003168:Complement Fixation Tests; D003587:Cytomegalovirus / Q000276:immunology*; D003586:Cytomegalovirus Infections / Q000175:diagnosis / Q000382:microbiology; D005455:Fluorescent Antibody Technique; D004854:Herpesvirus 4, Human / Q000276:immunology; D006801:Humans; D007070:Immunoglobulin A / Q000276:immunology*; D007074:Immunoglobulin G / Q000276:immunology*; D007075:Immunoglobulin M / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral; D000956:Antigens, Viral; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007075:Immunoglobulin M