title: The abolition of the protective effect of Clostridium welchii type A antiserum by ferric iron.
mesh_terms: D000818:Animals; D002951:Citrates / Q000494:pharmacology; D003016:Clostridium perfringens / Q000187:drug effects* / Q000276:immunology*; D006168:Guinea Pigs; D007116:Immunization, Passive; D007275:Injections, Intravenous; D007501:Iron / Q000494:pharmacology; D010587:Phagocytosis / Q000187:drug effects; D000644:Quaternary Ammonium Compounds / Q000494:pharmacology
chemical_list: D002951:Citrates; D000644:Quaternary Ammonium Compounds; D007501:Iron