title: Opsonic activity against zymosan of normal human serum of different blood types.
abstract: Serum opsonic activity against zymosan was found to be decreased more markedly in highly diluted O type serum than in the other 3 types, among which no difference was noted. Heat-killed bacteria were equally well opsonized with any type of serum. This peculiar activity of O type serum against zymosan was not affected by the removal of isohemagglutinins. No inhibitory activity was demonstrable in O type serum.
mesh_terms: D000017:ABO Blood-Group System / Q000276:immunology*; D006801:Humans; D007700:Kinetics; D009504:Neutrophils / Q000276:immunology; D009895:Opsonin Proteins / Q000276:immunology*; D010101:Oxygen Consumption; D010587:Phagocytosis; D010949:Plasma / Q000276:immunology*; D015054:Zymosan / Q000276:immunology*
chemical_list: D000017:ABO Blood-Group System; D009895:Opsonin Proteins; D015054:Zymosan