title: Studies in R-factor transfer.
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001419:Bacteria / Q000032:analysis* / Q000201:enzymology; D003470:Culture Media; D004269:DNA, Bacterial / Q000032:analysis* / Q000502:physiology; D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000187:drug effects; D006801:Humans; D008722:Methods; D008826:Microbial Sensitivity Tests; D009268:Nalidixic Acid / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D003470:Culture Media; D004269:DNA, Bacterial; D009268:Nalidixic Acid