Correlation of serological and biochemical groupings of Yersinia enterocolitica with the beta-lactamases of the strains.

The beta-lactamase isoelectric focusing patterns of 37 strains of Yersinia enterocolitica from various serological and biochemical groups were examined. Strains of different serological groups generally had different patterns, but those of serological groups 1, 2, 3 and 9 were identical.