title: Appearance of R-factor-mediated drug resistance in Salmonella typhimurium excreted by carrier calves on a feedlot.
mesh_terms: D000818:Animals; D002353:Carrier State / Q000382:microbiology / Q000662:veterinary*; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology*; D004352:Drug Resistance, Microbial; D005111:Extrachromosomal Inheritance; D012007:Rectum / Q000382:microbiology; D012481:Salmonella Infections, Animal / Q000382:microbiology*; D012486:Salmonella typhimurium / Q000187:drug effects / Q000302:isolation & purification*; D013752:Tetracycline / Q000494:pharmacology
chemical_list: D013752:Tetracycline