A new beta-hemolytic streptococcal species, , was isolated from organ specimens obtained from seals. This taxon is described on the basis of the results of a study of 22 strains. was serologically somewhat heterogeneous (group antigen -/F/C). Strains belonging to this species exhibited high levels of DNA-DNA homology to each other, as determined by DNA-DNA hybridization, but low levels of DNA-DNA homology to the type strains of other streptococcal species. A simple scheme for the differentiation of from other beta-hemolytic streptococci is presented. Strain 8399 H1 (= NCTC 12719) is the type strain of .


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