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Antimicrobial Effects of Ferula Gummosa Boiss Gum Against Extended-Spectrum Β-Lactamase Producing Acinetobacter Clinical Isolates



Faridafshar F1 ; Saffarian P2 ; Mahmoodzadehhosseini H3 ; Sattarian F3 ; Amin M4 ; Fooladi AAI3
Authors
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Authors Affiliations
  1. 1. Department of Microbiology, Islamic Azad University of Tonekabon, Tonekabon, Iran
  2. 2. Department of Microbiology, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran
  3. 3. Applied Microbiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
  4. 4. Department of Drug and Food Control and Pharmaceutical Quality Assurance Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran

Source: Iranian Journal of Microbiology Published:2016

Abstract

Background and Objectives: Acinetobacter spp. are important causes of nosocomial infections. They possess various antibiotic resistance mechanisms including extended spectrum beta lactamases (ESBLs). The aim of this study was to determine antibiotic resistance profile of Acinetobacter clinical isolates especially among ESBL-producing strains and to investigate the antimicrobial effects of oleo-gum-resin extract and essential oil of Ferula gummosa Boiss. Materials and Methods: 120 Acinetobacter strains were isolated from various clinical samples of hospitalized patients in Baqiyatallah hospital, Tehran during 2011-2012. Antibiotic susceptibility test was performed on the isolates using disk diffusion method. To detect and confirm the ESBL-positive isolates, phenotypic and genotypic tests were performed. Three types of F. gummosa oleo-gum-resin extracts and essential oils were prepared and the bioactive components of F. gummosa Boiss extracts were determined by GC-Mass chromatography. F. gummosa antimicrobial activity was evaluated against standard strain of Acinetobacter baumannii (ATCC19606) as well as Acinetobacter clinical isolates using well and disk diffusion methods. Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were determined by broth microdilution method. Results: 46 isolates were resistant to all tested antibiotics. All clinical isolates were resistant to cefotaxime. 12.94% of the isolates were phenotypically ESBL-producing among which 94.2% carried ESBL genes (blaPER-1, blaOXA-4 and blaCTX-M) detected by PCR. Oleo-gum-resin of F. gummosa had significant antibacterial activity and alcoholic essential oil had higher inhibitory effect on Acinetobacter strains (MIC of 18.75 mg/ml). Conclusion: Ferula gummosa extract contained components with well-known antimicrobial effects. © 2016, Tehran University of Medical Science. All rights reserved.
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