[Distribution of pathogenic Escherichia coli serotypes in the environment of dairy farms].
D000391:Air Microbiology; D000818:Animals; D002417:Cattle; D003612:Dairying; D004926:Escherichia coli / Q000302:isolation & purification*; D014586:USSR
O rasprostranennosti patogennykh serotipov kishechnoĭ palochki vo vneshneĭ srede molochnykh ferm.