Antibody to streptococcal opacity factor in human sera.
D000818:Animals; D000907:Antibodies, Bacterial / Q000032:analysis*; D001770:Blood Bactericidal Activity; D003289:Convalescence; D004196:Disease Outbreaks; D006801:Humans; D007106:Immune Sera; D010612:Pharyngitis / Q000276:immunology; D011817:Rabbits / Q000276:immunology; D013291:Streptococcus / Q000276:immunology*
D000907:Antibodies, Bacterial; D007106:Immune Sera