PRODUCTION OF HAEMOLYSINS BY YERSINIA ENTEROCOLITICA STRAINS

Haemolysins are one of the factors of aggression of bacteria. In the present study we demonstrated the results from the analysis of the haemolytic activities of 10 Yersinia enterocoliticaten strains of different origin and serotypes. Erythrocyte suspension prepared from human blood group "0", sheep and calf blood was used. Most strains isolated from clinically ill patients and belonging to serotype 03 produced haemolysins which was manifested on sheep blood agar. A conclusion was made that proof of haemolysins from strains isolated in epidemics could serve as a marker for epidemic study