Moderate genetic diversity with extensive antimicrobial resistance among multidrug-resistant Acinetobacter baumannii in a referral hospital in northeast Iran

Mosavat, A. and Soleimanpour, S. and Farsiani, H. and Salimizand, H. and Kebriaei, A. and Jamehdar, S. A. and Bagheri, M. and Rezaee, S. A. and Ghazvini, K. (2018) Moderate genetic diversity with extensive antimicrobial resistance among multidrug-resistant Acinetobacter baumannii in a referral hospital in northeast Iran. Jundishapur Journal of Microbiology, 11 (7).

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Abstract

Background: Acinetobacter baumannii is one of the major opportunistic pathogens with increasing clinical significance, particularly in the Hospital setting. Objectives: The study aimed to analyze the antibiotic resistance determinants in multidrug-resistant A. baumannii (MDRAB) isolates collected after an outbreak, with regard to the infection prevention control (IPC) interventions to eradicate the outbreak. Methods: Thirty nine isolates of MDRAB were collected during six months of the study after the outbreak. Infection prevention control was successful only for the first three months after the intervention. Antimicrobial susceptibility testing and minimum inhibitory concentrations (MICs) were determined by E-test. In addition, various resistance genes and the clonal relatedness of the isolates were performed by PCR and REP-PCR. Results: All isolates were MDRAB while being susceptible to colistin. The prevalence of blaADC, blaTEM, blaOXA24, blaVIM, and blaIMP was 82, 100, 70, 61, and 5, respectively. blaOXA51, blaOXA23, and ISAba1 were detected in all isolates, but blaOXA58 was not. Moreover, ISAba1 was located upstream to blaOXA23 and blaADC in 100 and 38.4 of the isolates, respectively. The most prevalent AME was aadB (100). Even though adeB and tetB efflux pumps were found in 100 and 95 of the isolates, respectively, tetA was not characterized. REP-PCR revealed five clusters of which, approximately 51 of the strains belonged to cluster C. Conclusions: Regarding the molecular approach, the effectiveness of IPC and epidemiological context has been identified. Stringent infection-control measures are urgent to restrict the outbreak. © 2018, Author(s).

Item Type: Article
Additional Information: Export Date: 16 February 2020 Correspondence Address: Ghazvini, K.; Antimicrobial Resistance Research Center, Bu-Ali Research Institute, Mashhad University of Medical SciencesIran; email: ghazvinik@mums.ac.ir
Uncontrolled Keywords: Acinetobacter baumannii Drug resistance Infection prevention and control Minimum inhibitory concentration Molecular epidemiology Polymerase chain reaction amikacin cefepime cefotaxime ceftazidime ceftriaxone ciprofloxacin colistin cotrimoxazole doxycycline gentamicin imipenem meropenem piperacillin tetracycline tobramycin adeB gene antibiotic resistance antibiotic sensitivity Article bacterial gene bacterial strain bacterium isolate blaADC gene blaIMP gene blaOXA23 gene blaOXA24 gene blaOXA51 gene blaOXA58 gene blaTEM gene blaVIM gene epsilometer test genetic variability infection control Iran multidrug resistance nonhuman tertiary care center tetB gene
Subjects: WA Public Health
WC Communicable Diseases
QV pharmacology
QZ pathology-neoplasms-Genetics
Divisions: Mashhad University of Medical Sciences
Depositing User: lib2 lib2 lib2
Date Deposited: 08 May 2020 16:33
Last Modified: 08 May 2020 16:33
URI: http://eprints.mums.ac.ir/id/eprint/17429

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