title: [Comparative evaluation of biological properties of Salmonella typhimurium strains of different origin and genetic nature of resistance to antibiotics].
abstract: The results obtained in the comparative study of the biological characteristics of Salmonella typhimurium strains of different origin are presented. The circulation of two biovariants differing in a number of biological characteristics, mainly in their susceptibility to antibiotics, has been shown. R-plasmids, mostly with the markers of resistance to tetracycline and with a molecular weight of 64 Md, have been isolated from "hospital" and "sporadic" strains possessing multiple antibiotic resistance.
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D001434:Bacteriophage Typing; D003227:Conjugation, Genetic; D003428:Cross Infection / Q000382:microbiology; D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000235:genetics; D005798:Genes, Bacterial; D005819:Genetic Markers; D006801:Humans; D051379:Mice; D010957:Plasmids; D012483:Salmonella Phages; D012486:Salmonella typhimurium / Q000201:enzymology / Q000235:genetics* / Q000472:pathogenicity
chemical_list: D000900:Anti-Bacterial Agents; D005819:Genetic Markers
vernacular_title: Sravnitel'noe izuchenie biologicheskikh svoĭstv shtammov Salmonella typhimurium razlichnogo proiskhozhdeniia i geneticheskoĭ prirody ikh rezistentnosti k antibiotikam.