Abstract

It has been confirmed by immunochemical methods that group B streptococcal capsular polysaccharides of type II contain terminal non-reducing β-(1–6)-D-galactosyl groups. This immunodominant structure is detected by immune antisera from rabbits. As β-(1–6)-D-galactosyl residues are the predominant end groups of a number of plant and animal galactans, anti-type II streptococcus antisera can also be used as anti-galactans. On the other side, different anti-galactans from various origins (lectins, myeloma proteins) can be applied to identifiy specifically group B streptococcal type II strains. In addition, it is shown that other group B streptococcal types can also be recognized by different lectins.

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