Repository of Research and Investigative Information

Repository of Research and Investigative Information

Kurdistan University of Medical Sciences

Detection of metallo-beta-lactamases, extended-spectrum beta-lactamases (ESBLs), outer membrane porins among Klebsiella pneumoniae strains isolated from hospitalized patients in Tehran

(2015) Detection of metallo-beta-lactamases, extended-spectrum beta-lactamases (ESBLs), outer membrane porins among Klebsiella pneumoniae strains isolated from hospitalized patients in Tehran. Journal of Zanjan University of Medical Sciences and Health Services.

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Official URL: https://www.scopus.com/inward/record.uri?eid=2-s2....

Abstract

Background and Objective: Klebsiella pneumoniae is one of the most important causative agents both in form of hospital acquired and community-acquired infections. This bacterium is one of the most prevalent pathogens that is isolated from hospitals and is associated with high mortality rates. The uprising trend of multi drug resistance among Klebsiella pneumoniae has limited the treatment options. The objective of this study was to detect Metallo-beta- Lactamases, Extended-spectrum beta-lactamases (ESBLs) and outer membrane porins among Klebsiella pneumoniae strains isolated from hospitalized patients in Taleghani and Mofid hospitals. Materials and Methods: This cross-sectional study was performed on 100 Klebsiella pneumoniae isolates from 2012 to 2013. Antibiotic susceptibility tests were performed via Kirby-Bauer disc diffusion and Broth Microdilution methods according to CLSI guidelines. Metallo-beta-Lactamases, Extended-spectrum beta-lactamases (ESBLs) producing strains were detected by phenotypic confirmatory test and Combination Disk Diffusion Test (CDDT), respectively. The bla<inf>AIM</inf>, bla<inf>SPM</inf>, bla<inf>DIM</inf>, bla<inf>IMP</inf>, bla<inf>VIM</inf>, bla<inf>TEM</inf>, bla<inf>SHV</inf> and bla<inf>CTX-M</inf> genes were detected using PCR and sequencing method. The outer membrane porins including OmpK35 and OmpK36 were analysed throughSDS-PAGE, PCR and sequencing methods. Results: Out of 100 K. pneumoniae isolates, 48 (48) and 3(3) were ESBL and MBL positive, respectively. The presence of bla<inf>TEM-1</inf>, bla<inf>SHV</inf> and bla<inf>CTX-M-15</inf> was detected in 24 (50), 30(62.5) and 28 (58.33) isolates respectively, while other genes were not detected. Outer Membrane Porins, OmpK35, was detected among 30 (62.5) of 48 ESBL-producing isolates while OmpK36 was found in 35(72.91) of 48 ESBL-producing isolates. In this study, Fosfomycin and Tigecycline were more effective than other antibiotics. Conclusion: The high prevalence of ESBL-producing K. pneumoniae detected in this study is of great concern which requires infection control measures including antibacterial management and rapid detection of beta-lactamasesproducing isolates. © 2015, Zanjan University of Medical Sciences and Health Services. All Rights Reserved.

Item Type: Article
Keywords: fosfomycin; tigecycline, antibiotic sensitivity; Article; bacterial strain; broth dilution; cross-sectional study; disk diffusion; extended spectrum beta lactamase producing Klebsiella pneumoniae; gene sequence; hospital patient; human; Klebsiella pneumoniae; metallo beta lactamase producing Klebsiella pneumoniae; nonhuman; outer membrane porin producing Klebsiella pneumoniae; phenotype; polymerase chain reaction
Page Range: pp. 89-102
Journal or Publication Title: Journal of Zanjan University of Medical Sciences and Health Services
Volume: 23
Number: 98
Publisher: Zanjan University of Medical Sciences and Health Services
ISSN: 16069366
Depositing User: مهندس جمال محمودپور
URI: http://eprints.muk.ac.ir/id/eprint/834

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