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en Molecular Detection of Adefg Efflux Pump Genes and their Contribution to Antibiotic Resistance in Acinetobacter baumannii Clinical Isolates میکروب شناسی Microbiology مقالات اصلی Original Article <div style="text-align: justify;">Background: Acinetobacter baumannii (A. baumannii) is one of the most important bacteria causing nosocomial infections worldwide. Over the past few years, several strains of A. baumannii have shown antibiotic resistance, which may be due to the activity of efflux pumps. This study was aimed to detect AdeFG efflux pump genes and their contribution to antibiotic resistance in A. baumannii clinical isolates. Methods: A total of 200 A. baumannii clinical isolates were collected from clinical specimens of ulcers, pus, sputum, and blood. All isolates were identified using standard biochemical tests. After identifying and cleaving the genome by boiling, PCR was performed on samples using specific primers. The antimicrobial susceptibility patterns were determined by disk diffusion, with and without CCCP efflux pump inhibitor were determined according to CLSI guidelines. Results: We identified 60 clinical isolates of A. baumannii using biochemical differential tests. Identification of all A. baumannii isolates was confirmed by blaOXA-51-like PCR. According to the results of our study, 98.37% of A. baumannii isolates were resistant to ciprofloxacin, norfloxacin, and levofloxacin. PCR results indicated that all 60 A. baumannii isolates contained the AdeF and 76.66% contained AdeG. Conclusions: the results of this study demonstrated that most of the A. baumannii isolates contained AdeF and AdeG efflux pump genes, and more than 98% of the isolates were resistant to ciprofloxacin, norfloxacin, and levofloxacin. This reflected the significant contribution of efflux pumps to the development of resistance to these antibiotics.</div> Acinetobacter baumannii, AdeFG, Antibiotic Resistance, Efflux pump, Molecular detection. 413 418 http://rbmb.net/browse.php?a_code=A-10-373-1&slc_lang=en&sid=1 Rasoul Kaviani kavianirasoul90a@gmail.com 100319475328460017432 100319475328460017432 No Department of Medical Microbiology, Faculty of Medicine, Shahed University, Tehran, Iran. Iman Pouladi imanpouladi96a@gmail.com 100319475328460017433 100319475328460017433 No Student Research Committee, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran. Mohammad Niakan Niakan@shahed.ac.ir 100319475328460017434 100319475328460017434 Yes Department of Medical Microbiology, Faculty of Medicine, Shahed University, Tehran, Iran. Reza Mirnejad rmirnejad@yahoo.com 100319475328460017435 100319475328460017435 No Molecular Biology Research Center, System biology and Poisoning institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.