title: Role of easily released substances (ERS) from bacteria into physiologic solutions in natural immunity. IV. The action of ERS from E. coli O 55 and O 111 on opsonins for Staphylococcus aureus in guinea pig sera.
mesh_terms: D000373:Agglutinins / Q000032:analysis; D000818:Animals; D002473:Cell Wall / Q000276:immunology; D003165:Complement System Proteins / Q000032:analysis; D004926:Escherichia coli / Q000276:immunology*; D006168:Guinea Pigs / Q000276:immunology; D007962:Leukocytes / Q000276:immunology; D009895:Opsonin Proteins; D010587:Phagocytosis / Q000187:drug effects; D013210:Staphylococcus / Q000276:immunology*
chemical_list: D000373:Agglutinins; D009895:Opsonin Proteins; D003165:Complement System Proteins