[Isolation of Escherichia coli O 157 from pigs with diarrhea].

Biochemical and serologic studies were carried out with Escherichia coli strains isolated from pigs affected with diarrhea. A total of 161 were investigated, 13 (8.01 per cent) of which were found to belong to serogroup O 157. Almost all strains proved beta-hemolytic, enterotoxigenic, and K 88-positive. The strains of this serogroup were found for the first time in this country in swine colibacteriosis.