SUMMARYPurified teichoic acids and extracts with group-specific activity have been examined with specific antisera for a number of lactobacilli. The wall teichoic acids from groups D and E lactobacilli have been identified as the group-specific substances, whereas in group A the intracellular teichoic acid showed group-specificity. It is possible that group-specificity is associated with intracellular teichoic acid in group F.
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