title: Serological relationships between serotype-III Streptococcus sanguis and Lancefield group-H streptococci.
abstract: Certain strains of Streptococcus sanguis and group-H streptococci have been shown to have similar physiological properties and serological specificities. Serological studies revealed that serotype-III S. sanguis shared a common antigen with the so-called "British" group-H streptococci, but not with the "American" group-H streptococci. Serotype-III antigen was extracted in cold 5% trichloroacetic acid from isolated cell walls of S. sanguis ATCC 10558, and purified chromatographically. The purified serotype-III antigen consisted of neutral and amino sugars and some phosphorus, and was negatively charged. Hapten inhibition of the quantitative precipitin reaction between serotype-III antigen and antiserum indicated the strong possibility of alpha-glucosidic linkages being an immunodeterminant of the antigen.
mesh_terms: D000942:Antigens, Bacterial / Q000032:analysis / Q000276:immunology* / Q000302:isolation & purification; D002241:Carbohydrates / Q000032:analysis; D000939:Epitopes; D005779:Immunodiffusion; D012703:Serotyping; D013291:Streptococcus / Q000145:classification / Q000276:immunology*; D013298:Streptococcus sanguis / Q000145:classification / Q000276:immunology*
chemical_list: D000942:Antigens, Bacterial; D002241:Carbohydrates; D000939:Epitopes