title: The effect on virulence of transferring R factors to Salmonella typhimurium in vivo.
mesh_terms: D000667:Ampicillin; D000818:Animals; D002432:Cecum / Q000382:microbiology; D002645:Chickens; D002701:Chloramphenicol; D004926:Escherichia coli; D005111:Extrachromosomal Inheritance; D008297:Male; D009268:Nalidixic Acid; D009355:Neomycin; D010403:Penicillin Resistance; D012481:Salmonella Infections, Animal / Q000401:mortality; D012486:Salmonella typhimurium / Q000472:pathogenicity*; D013307:Streptomycin; D013449:Sulfonamides; D013752:Tetracycline; D014774:Virulence
chemical_list: D013449:Sulfonamides; D009268:Nalidixic Acid; D002701:Chloramphenicol; D000667:Ampicillin; D013752:Tetracycline; D009355:Neomycin; D013307:Streptomycin