SUMMARY: Extraction of NCTC 8606 with formamide yielded a mixture of carbohydrate antigens which was fractionated by alcohol precipitation into a type antigen (containing rhamnose, glucose, galactose) and a group-like (z) antigen. The type antigen is related to type antigen III in group F streptococci. After partial hydrolysis five disaccharides and two trisaccharides were isolated and identified. Five of these were inhibitory in the quantitative precipitation of the type antigen.

Two other strains of contained different group-like antigens and lacked the type antigen isolated from strain NCTC 8606.


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