title: Complex surveillance of Streptococcus pyogenes. II. Resistance in human blood and bactericidal activity receptors of field and collection streptococci.
abstract: A comparative study of a series of 31 epidemic streptococci and 36 collection M protein producers showed no statistically significant difference in their resistance in human blood. Even highly resistant field strains did not produce M protein (as the main bactericidal activity receptor) under laboratory conditions, however, although under natural conditions they left an anti-M response in the exposed population. Streptococcal resistance is not generally associated with M protein, but is influenced by another factor.
mesh_terms: D000907:Antibodies, Bacterial / Q000032:analysis; D000917:Antibody Formation; D001426:Bacterial Proteins / Q000096:biosynthesis; D001666:Binding Sites, Antibody; D001770:Blood Bactericidal Activity; D003604:Czechoslovakia; D004196:Disease Outbreaks; D006801:Humans; D008887:Military Medicine; D012703:Serotyping; D013045:Species Specificity; D013297:Streptococcus pyogenes / Q000276:immunology* / Q000378:metabolism; D014069:Tonsillitis / Q000382:microbiology*; D014764:Viral Proteins / Q000276:immunology*
chemical_list: D000907:Antibodies, Bacterial; D001426:Bacterial Proteins; D014764:Viral Proteins