Effect of putative efflux pump inhibitors and inducers on the antimicrobial susceptibility of Campylobacter jejuni and Campylobacter coli

J Med Microbiol. 2008 Jul;57(Pt 7):851-855. doi: 10.1099/jmm.0.47823-0.


The CmeABC efflux pump plays an important role in the antimicrobial resistance of Campylobacter jejuni and Campylobacter coli. The aim of this investigation was to study the effect of putative efflux pump inhibitors, phenyl-arginine-beta-naphthylamide (PAbetaN) and 1-(1-naphthylmethyl)-piperazine (NMP), as well as the effect of putative efflux pump inducers, sodium salicylate and sodium deoxycholate, on the MIC levels of erythromycin, ciprofloxacin, kanamycin, tetracycline and rifampicin for C. jejuni and C. coli. Our results indicated that susceptibility to erythromycin and rifampicin increased, respectively, 8- to 32- and 8- to 64-fold in the presence of PAbetaN and to a lesser extent in the presence of NMP. Salicylate produced a 2- to 4-fold increase in ciprofloxacin MIC values, whereas little effect was observed in the presence of deoxycholate.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Anti-Bacterial Agents / pharmacology*
  • Bacterial Proteins / antagonists & inhibitors
  • Bacterial Proteins / metabolism
  • Campylobacter coli / drug effects*
  • Campylobacter jejuni / drug effects*
  • Deoxycholic Acid / pharmacology
  • Dipeptides / pharmacology*
  • Drug Resistance, Bacterial
  • Gene Expression Regulation, Bacterial
  • Humans
  • Membrane Transport Proteins / drug effects*
  • Membrane Transport Proteins / metabolism
  • Microbial Sensitivity Tests
  • Piperazines / pharmacology*
  • Sodium Salicylate / pharmacology


  • 1-(1-naphthylmethyl)piperazine
  • Anti-Bacterial Agents
  • Bacterial Proteins
  • Dipeptides
  • Membrane Transport Proteins
  • Piperazines
  • phenylalanine arginine beta-naphthylamide
  • Deoxycholic Acid
  • Sodium Salicylate