A note on the serological typing of some strains of Streptococcus cremoris

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Abstract
The serological identity of group N streptococci was established by Shattock & Mattick (1943), who discovered that Streptococcus lactis and Str. cremoris had a common antigen, which differentiated them from the rest of the Lancefield groups of streptococci. Although phage typing of these organisms has met with some success (Nichols & Hoyle, 1949; Whitehead & Bush, 1957) attempts to type these organisms with rabbit antisera so far have failed (Briggs & Newland, 1953).