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  • Title: Serological relationships between serotype-III Streptococcus sanguis and Lancefield group-H streptococci.
    Author: Akada H, Asakawa H, Kitamura K, Okahashi N, Koga T, Hamada S.
    Journal: J Med Microbiol; 1987 Jun; 23(4):321-6. PubMed ID: 2438413.
    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.
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