title: Apparent absence of transferable resistance to nalidixic acid in pathogenic Gram-negative bacteria.
mesh_terms: D003227:Conjugation, Genetic; D004755:Enterobacteriaceae / Q000187:drug effects*; D004926:Escherichia coli / Q000187:drug effects; D009268:Nalidixic Acid / Q000494:pharmacology*; D011815:R Factors; D013045:Species Specificity
chemical_list: D009268:Nalidixic Acid