title: Ampicillin-resistant R factors derived from Shigella strains.
mesh_terms: D000667:Ampicillin / Q000494:pharmacology*; D002701:Chloramphenicol / Q000494:pharmacology; D003227:Conjugation, Genetic; D004926:Escherichia coli / Q000187:drug effects; D005111:Extrachromosomal Inheritance; D008826:Microbial Sensitivity Tests; D010403:Penicillin Resistance; D010405:Penicillinase / Q000032:analysis; D011995:Recombination, Genetic; D012760:Shigella / Q000187:drug effects* / Q000201:enzymology; D013307:Streptomycin / Q000494:pharmacology; D013424:Sulfanilamides / Q000494:pharmacology; D013752:Tetracycline / Q000494:pharmacology; D014161:Transduction, Genetic
chemical_list: D013424:Sulfanilamides; D002701:Chloramphenicol; D000667:Ampicillin; D010405:Penicillinase; D013752:Tetracycline; D013307:Streptomycin