title: Serological identification of Branhamella catarrhalis. Serological evidence for infection.
abstract: A protein antigen--P-antigen--characteristic of Branhamella catarrhalis has been described. Precipitating antibodies against this antigen occur in a majority of healthy human sera; serological evidence for a pathogenic role of B. catarrhalis is accumulating. The occurrence of complement-fixing antibodies has been demonstrated during bronchopulmonary infection with B. catarrhalis and in maxillary sinusitis. Increases in antibody titres assessed by an enzyme-linked immunosorbent assay (ELISA) technique have been reported in children with acute otitis media. An ELISA, using purified P-antigen, for the evaluation of IgG, IgM and IgA antibodies against B. catarrhalis is being developed.
mesh_terms: D000942:Antigens, Bacterial / Q000032:analysis; D001424:Bacterial Infections / Q000175:diagnosis* / Q000382:microbiology; D003429:Cross Reactions; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis; D009346:Neisseriaceae / Q000145:classification* / Q000276:immunology
chemical_list: D000942:Antigens, Bacterial; D007136:Immunoglobulins