[Sensitivity of E. coli strains to Fredericq-type colicins].

Studied was the spectrum of sensitivity of various Escherichia coli strains to the standard types of colicine after Fredericq. The strains were isolated from dead and emergency slaughtered animals as well as from food products of animal origin. It was found that regardless of the type (colicinogenic and noncolicinogenic) and the origin of the strains almost a monotype spectrum of sensitivity is observed. With but few exceptions the strains proved sensitive to colicine of the types V, D, E+I, F, C, I, J+I, K, Sj, S3+I, S4 and S5. The similarity referred to substantiates the expedience in determining the type of colicine of bacteria in epidemiologic and epizootiologic studies.