Journal
FUTURE MICROBIOLOGY
Volume 13, Issue 1, Pages 59-67Publisher
FUTURE MEDICINE LTD
DOI: 10.2217/fmb-2017-0121
Keywords
antibiotics; Burkholderia cepacia complex; efflux pump inhibitors; essential oils; RND efflux pumps
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Funding
- Ente Cassa di Risparmio di Firenze [2013.0657]
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Aim: To investigate the activity and mechanisms of action of six essential oils (EOs) against Burkholderia cepacia complex, opportunistic human pathogens highly resistant to antibiotics. Materials & methods: Minimal inhibitory concentration of EOs alone, plus antibiotics or efflux pump inhibitors was determined. Results: Origanum vulgare, Thymus vulgaris and Eugenia caryophyllata EOs resulted to be more active than the other EOs. EOs did not enhance antibiotic activity against the model strain B. cenocepacia J2315. EOs resulted more active in the presence of an efflux pump inhibitor acting on Resistance-Nodulation Cell Division efflux pumps and against B. cenocepacia J2315 Resistance-Nodulation Cell Division knocked-out mutants. Conclusion: EOs showed intracellular mechanisms of action and, thus, the efflux pumps inhibitor addition could boost their activity.
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