title: Selection of multiple-antibiotic-resistant (mar) mutants of Escherichia coli by using the disinfectant pine oil: roles of the mar and acrAB loci.
abstract: Mutants of Escherichia coli selected for resistance to the disinfectant pine oil or to a household product containing pine oil also showed resistance to multiple antibiotics (tetracycline, ampicillin, chloramphenicol, and nalidixic acid) and overexpressed the marA gene. Likewise, antibiotic-selected Mar mutants, which also overexpress marA, were resistant to pine oil. Deletion of the mar or acrAB locus, the latter encoding a multidrug efflux pump positively regulated in part by MarA, increased the susceptibility of wild-type and mutant strains to pine oil.
authors.forename: M C
authors.initials: MC
authors.lastname: Moken
authors.forename: L M
authors.initials: LM
authors.lastname: McMurry
authors.forename: S B
authors.initials: SB
authors.lastname: Levy
mesh_terms: D000667:Ampicillin / Q000494:pharmacology; D002701:Chloramphenicol / Q000494:pharmacology; D004202:Disinfectants / Q000494:pharmacology*; D018432:Drug Resistance, Multiple / Q000235:genetics*; D004926:Escherichia coli / Q000187:drug effects* / Q000235:genetics*; D005798:Genes, Bacterial; D009154:Mutation; D009268:Nalidixic Acid / Q000494:pharmacology; D010641:Phenotype; D010938:Plant Oils / Q000494:pharmacology*; D013752:Tetracycline / Q000494:pharmacology
chemical_list: D004202:Disinfectants; D010938:Plant Oils; D009268:Nalidixic Acid; D002701:Chloramphenicol; D000667:Ampicillin; D013752:Tetracycline