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[Localization of group A streptococcal nontype-specific antigens and their occurrence among streptococci of different groups].

It was shown by immunodiffusion methods that nontypespecific antigens revealed in the HCl extracts of streptococcus, group A, were localized in the cell wall. In B, E, H, K, L, M, P, S, T streptococci groups there was revealed only one, and in C and G streptococci groups--two antigens identical to the HTC antigens of streptococci, group A. Besides, an antigen, which was apparently specific specific for group A streptococcus only, was detected. The data obtained should be taken into consideration in the elaboration of improved method of grouping and typing group A streptococcus.