title: Transduction of various R factors by phage P1 in Escherichia coli and by phage P22 in Salmonella typhimurium.
abstract: R factors fi(+) and fi(-), with various combinations of drug-resistance markers and isolated from independent sources, were transduced by phage P1kc in Escherichia coli and by phage P22 in Salmonella typhimurium. Usually the entire R factor was transduced by P1kc in E. coli, as indicated by the absence of segregation of the drug-resistance markers from their conjugal transferability. In contrast, the patterns of segregation of the drug-resistance markers and their conjugal transferability differed considerably among various R factors after transduction by P22 in S. typhimurium. Transduction frequencies varied among R factors in both transduction systems.
mesh_terms: D002701:Chloramphenicol / Q000494:pharmacology; D003227:Conjugation, Genetic; D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000187:drug effects; D005111:Extrachromosomal Inheritance; D005827:Genetics, Microbial; D012483:Salmonella Phages; D012486:Salmonella typhimurium / Q000187:drug effects; D013307:Streptomycin / Q000494:pharmacology; D013424:Sulfanilamides / Q000494:pharmacology; D013752:Tetracycline / Q000494:pharmacology; D014161:Transduction, Genetic
chemical_list: D013424:Sulfanilamides; D002701:Chloramphenicol; D013752:Tetracycline; D013307:Streptomycin