title: Genetical distinction of R factors derived from Shigellae and Salmonellae.
mesh_terms: D001435:Bacteriophages; D003087:Colicins / Q000032:analysis*; D003227:Conjugation, Genetic; D004352:Drug Resistance, Microbial; D004926:Escherichia coli; D005827:Genetics, Microbial; D012475:Salmonella / Q000032:analysis*; D012760:Shigella / Q000032:analysis*
chemical_list: D003087:Colicins