Studies on Bacteriophage Distribution

II. Isolation and Host Range Based Classification of Phages Active on Three Species of Enterobacteriaceae

Abstract

Twenty-eight bacteriophage strains active on one or more species of Enterobacteriaceae were isolated from sewage and were classified into seven host range groups. Two isolates resemble S13, three isolates appear to be closely related to T_D, and one seems to be related to T even phages. Members of one host range group are active on three bacterial species, viz., Escherichia coli, Salmonella lyphimurium, and Shigella sonnei. Some of the E. coli K12 strains selected for resistance to phage HK019 are sensitive to S13 but not to φ×174.