title: [Transmissivity of the various R factors found among E. coli cultures circulating under natural conditions].
abstract: Transmissivity of drug resistance in wild strains of E. coli was shown to be determined not only by the presence of the transmissive factor and r-determinants in the microbial cell, but also by the functional activity of the R-factor. The capacity of the R-factor for transmission depended to a certain extent on the number of the r-determinants in the R-factor and the presence of various r-determinants in the R-factor.
mesh_terms: D000667:Ampicillin / Q000494:pharmacology; D002701:Chloramphenicol / Q000494:pharmacology; D004926:Escherichia coli / Q000187:drug effects / Q000648:ultrastructure*; D005799:Genes, Dominant; D006801:Humans; D007612:Kanamycin / Q000494:pharmacology; D010403:Penicillin Resistance; D011815:R Factors; D012623:Seawater; D012722:Sewage; D013307:Streptomycin / Q000494:pharmacology; D013752:Tetracycline / Q000494:pharmacology
chemical_list: D012722:Sewage; D007612:Kanamycin; D002701:Chloramphenicol; D000667:Ampicillin; D013752:Tetracycline; D013307:Streptomycin
vernacular_title: Transmissivnost' razlichnykh R-faktorov, obnaruzhennykh sredi kul'tur E. coli, tsirkuliruiushchikh v estestvennykh usloviiakh