title: [Cross reactions between polysaccharides of group A, L, and A-variant streptococci].
abstract: In group A and A-variant streptococcal antisera the presence of antibodies reacting with group L streptococcal polysaccharide (L polysaccharide) was revealed. Group A and A-variant streptococcal polysccharides (A and V polysaccharides) were shown to be partially identical to L polysccharide by means of the precipitation test in agar gel. Experiments in inhibiting the reactions of the above mentioned antisera with A, V and L polysaccharide preparations suggest the presence of a determinant common to all these polysccharides and differing from the "ramnose" determinant of the polysaccharides and from the determinant characteristic of A polysaccharide. In the identification of group A streptococci by the immunological methods, as well as in the study of cross reactions with the tissues of mammals, the possible presence of antibodies against various antigenic determinants of A polysaccharide, one of which is also common to L polysaccharide, should be taken into consideration.
mesh_terms: D000818:Animals; D000942:Antigens, Bacterial / Q000032:analysis*; D003429:Cross Reactions; D000939:Epitopes; D007122:Immunoelectrophoresis; D011135:Polysaccharides, Bacterial / Q000276:immunology*; D011233:Precipitin Tests; D011817:Rabbits / Q000276:immunology; D013045:Species Specificity; D013291:Streptococcus / Q000276:immunology*; D013297:Streptococcus pyogenes / Q000276:immunology
chemical_list: D000942:Antigens, Bacterial; D000939:Epitopes; D011135:Polysaccharides, Bacterial
vernacular_title: Perekrestnye reaktsii mezhdu polisakharidami streptokokkov grupp A, L i A-variant.