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Detection and Genetic Characterization of Metallo-β-Lactamase IMP-1 and VIM-2 in Pseudomonas aeruginosa Strains From Different Hospitals in Kermanshah, Iran.

Abstract：

BACKGROUND:Pseudomonas aeruginosais a frequent nosocomial pathogen that causes severe diseases in many settings. Carbapenems, including meropenem and imipenem, are effective antibiotics against this organism. However, the use of carbapenems has been hampered by the emergence of strains resistant to carbapenemsvia different mechanisms such as the production of metallo-β-lactamases (MBLs), which hydrolyze all carbapenems. Several kinds of MBLs have been reported, among them VIM and IMP types being the most clinically significant carbapenemases. OBJECTIVES:We aimed to determine the distribution of bla VIM-2 and bla IMP-1 transferable genes encoding MBLs in P. aeruginosa isolated from three academic hospitals in Kermanshah. PATIENTS AND METHODS:From 22nd June to 22nd September 2012, 225 isolates of P. aeruginosa were collected. These isolates were tested for antibiotic susceptibility with the Kirby-Bauer disk-diffusion method, and the MBLs were assessed using the imipenem-EDTA double-disk synergy test. The isolates were investigated for bla VIM - 2 and bla IMP-1 genes using polymerase chain reaction. RESULTS:Among the 225 isolates, 33.7% (76/225) and 18.1% (41/225) were resistant to imipenem and meropenem, respectively. Of the 76 imipenem-resistant P. aeruginosa strains, 45 (59.2%) were positive for MBLs, 34 (75%) strains carried the bla IMP-1 gene, and 1 (2.2%) strain carried the bla VIM - 2 gene. CONCLUSIONS:Our results showed that there was a high frequency of IMP-1 positive P. aeruginosa in the different wards of the hospitals.

journal_name

Jundishapur J Microbiol

journal_title

Jundishapur journal of microbiology

authors

Abiri R,Mohammadi P,Shavani N,Rezaei M

doi

10.5812/jjm.22582

subject

Has Abstract

pub_date

2015-09-22 00:00:00

pages

e22582

issue

eissn

2008-3645

issn

2008-4161

journal_volume

pub_type

杂志文章

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Detection and Genetic Characterization of Metallo-β-Lactamase IMP-1 and VIM-2 in Pseudomonas aeruginosa Strains From Different Hospitals in Kermanshah, Iran.