title: Two new E colicins, E8 and E9, produced by a strain of Escherichia coli.
abstract: We have isolated a strain of Escherichia coli from chicken caeca which produces two E colicins and colicin M. This strain has seven plasmids, five of which have been transferred to E. coli K12. Two E. coli K12 derivatives which produce the two E colicins separately have been tested against seven standard E colicin producing strains which define seven different immunity groups. Our results indicate that these new E colicins define two further immunity groups, E8 and E9.
mesh_terms: D000818:Animals; D002432:Cecum / Q000382:microbiology; D002645:Chickens; D003087:Colicins / Q000096:biosynthesis* / Q000276:immunology; D003227:Conjugation, Genetic; D004352:Drug Resistance, Microbial; D004587:Electrophoresis, Agar Gel; D004926:Escherichia coli / Q000276:immunology / Q000378:metabolism*; D010957:Plasmids; D013752:Tetracycline / Q000494:pharmacology
chemical_list: D003087:Colicins; D013752:Tetracycline