Detection of AdeABC Efllux Pump Encoding Genes and Antimicrobial Effect of Mentha Longifolia and Menthol on MICs of Imipenem and Ciprofloxacin in Clinical Isolates of Acinetobacter Baumannii

Overview

Journal BMC Complement Med Ther

Publisher Biomed Central

Specialty Rehabilitation Medicine

Date 2020 Mar 21

PMID 32192484

Citations 10

Authors

Hassan Mahmoudi

Leili Shokoohizadeh

Nayreh Zare Fahim

Ali Mohamadi Bardebari

Shirin Moradkhani

Mohammad Yousef Alikhani

Affiliations

Soon will be listed here.

Abstract

Background: Acinetobacter baumannii is an opportunistic pathogen that causes nosocomial infections especially in patients in intensive care units (ICUs). Accordingly, the aim of our study was to detection of adeABC efllux pump encoding genes and antimicrobial effect of the essential oil of Mentha longifolia and Menthol on the minimum inhibitory concentration (MIC) of imipenem and ciprofloxacin in clinical isolates of A. baumannii.

Methods: A total of 75 clinical isolates of A. baumannii were collected. The presence of efflux pump genes was detected by polymerase chain reaction (PCR). The minimum inhibitory concentration (MIC) of the essential oil of Mentha longifolia and Menthol and their combined effect with antibiotics were measured by microbroth dilution method and fractional inhibitory concentration (FIC) index.

Results: The frequency of adeA, adeB, and adeC genes in clinical isolates of A. baumannii were 86.7, 90.7, and 92%, respectively. When the essential oil of Mentha longifolia was combined with ciprofloxacin and imipenem, MICs decreased 4- and 8-fold, respectively. In the combination of menthol with imipenem, the resistance to imipenem was reduced from 0- to 16-fold in 90% (63/70) of the isolates.

Conclusion: The presence of efflux pump genes in more than 90% of A. baumannii isolates indicates its potential role in inducing imipenem- and ciprofloxacin-resistance in this bacterium. Menthol has an antimicrobial effect as an active ingredient in Mentha longifolia. In the future, the combination of medicinal plants with antibiotics can be used as a complement in treating diseases caused by drug-resistant bacteria such as A. baumannii infections.

Citing Articles

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