The production of opacity in serum by group A streptococci and its relationship withthe presence of M antigen.
D000818:Animals; D000941:Antigens / Q000032:analysis*; D001647:Bile Acids and Salts; D001769:Blood; D002462:Cell Membrane / Q000276:immunology; D006736:Horses; D006851:Hydrochloric Acid; D007106:Immune Sera; D008722:Methods; D012703:Serotyping; D012995:Solubility; D013291:Streptococcus / Q000145:classification / Q000276:immunology*
D000941:Antigens; D001647:Bile Acids and Salts; D007106:Immune Sera; D006851:Hydrochloric Acid