[Incidence of conjugated R plasmids in E. coli strains isolated from birds with colisepticemia].
Studied were a total of 143 strains of Escherichia coli, isolated from birds affected with coli septicaemia, with special reference to the presence of conjugative R-plasmids. It was found that 57 of the strains could not be tested on E. coli C-600, and the carrying of R-plasmids with the remaining 86 strains reached 65.11 per cent. The markers of kanamycin, sulphatiazol, and neomycin were transmitted in a highest percent (63.95, 53.47, and 45.43, respectively). The level of the resistance transferred proved close or comparable to that of the field strains. It was concluded that the conjugative R-plasmids were widely occurring with Escherichia coli strains that were pathogenic for birds. This should be taken into consideration when using chemotherapeutic agents with birds.
D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D003227:Conjugation, Genetic; D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000187:drug effects / Q000235:genetics*; D004927:Escherichia coli Infections / Q000382:microbiology / Q000662:veterinary*; D011200:Poultry; D011201:Poultry Diseases / Q000382:microbiology*; D011815:R Factors
D000900:Anti-Bacterial Agents
Razprostranenie na koniugativnite R-plazmidi pri shchamove E. coli, izolirani ot ptitsi s koliseptitsemiia.