Abstract

IMP-4 class B metallo-β-lactamase-producing Enterobacteriaceae are resistant to carbapenems. The aim of this study was to characterize of IMP-4 metallo-β-lactamase (MBL)-producing Enterobacter aerogenes clinical isolate. IMP-4 MBL-producing E. aerogenes clinical isolate was collected from a Korean Hospital in 2017. Antimicrobial susceptibility was determined by disk diffusion methods. Further, minimum inhibitory concentrations of β-lactams were determined by Etest. Detection of bla genes was performed by PCR. The genetic organization of class 1 integron carrying the MBL gene cassette was investigated by PCR mapping and sequencing. E. aerogenes strain YN170501 exhibited resistance to penicillins, cephalosporins, and carbapenems and was susceptible to monobactam, aminoglycosides, fluoroquinolone, tigecycline, and trimethoprim-sulfamethoxazole. The blaIMP-4 gene was located in class 1 integron. The blaIMP-4 gene has never been reported in Enterobacter aerogenes clinical isolate from Korea.

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