[Relationship between the virulence of a culture and the presence of common (non-type-specific) antigens in strains of group A streptococcus of different types].
In studying common (nontypespecific) antigens sensitivity to trypsin there was shown their wide distribution among the cultures of streptococcus, group A, belonging to different types and containing M-proteins. The antigen No. 1, identical to one of the antigens of the thermostable fraction was found in the cultures, irrespective of the degree of their virulence. The antigen No. 2 was characteristic of only virulent cultures obtained after the increase of the virulence and forming matt-form colonies. Both of the antigens were referred to the category of R-antigens. The presence of the nonspecific antigens in the hydrochloric extracts should be taken into consideration in typing streptococci of group A and determination of M-antigens.
D000942:Antigens, Bacterial; D004587:Electrophoresis, Agar Gel; D000939:Epitopes; D005779:Immunodiffusion; D013297:Streptococcus pyogenes / Q000276:immunology* / Q000472:pathogenicity; D014774:Virulence
D000942:Antigens, Bacterial; D000939:Epitopes
Nalichie obshchikh (netipospetsificheskikh) antigenov v shtammakh streptokokka gruppy A raznykh tipov v zavisimosti ot stepeni virulentnosti kul'tury