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[Study of the properties of E. coli of serological group 03 isolated in acute intestinal diseases].

The authors studied the properties of 115 strains of E. coli of serological group 03 isolated from 49 children and adults with acute intestinal disturbances. The majority of the children (82.9%) were aged under one year. Results of the study of the antigenic structure and biochemical properties permitted to differentiate the strains isolated into 3 serological types, with the prevalence of strains of type O3 : K2 (L) : H2 (78.3%), and 8 biochemical variants. The majority of the strains possessed hemolytic properties. Strains of serological group O3 were isolated repeatedly from the patients during the sickness, whereas none were revealed in examination of 132 healthy children and adults. The data obtained permitted to consider these microbes to be possible causative agents of intestinal coliinfection, and to refer them to the enteropathogenic category.