Dissemination of CTX-M Type Extended-Spectrum β-Lactamases Among Klebsiella pneumoniae Clinical isolates in Chungcheong Province

충청지역의 임상검체에서 분리된 폐렴막대균에 CTX-M형 Extended-Spectrum β-lactamases 확산

  • Sung, Ji-Youn (Dept. of Biomedical Laboratory Science, Far East University)
  • 성지연 (극동대학교 임상병리학과)
  • Received : 2016.08.24
  • Accepted : 2016.10.20
  • Published : 2016.10.28


The emergence and dissemination of extended-spectrum ${\beta}$-lactamse (ESBL) producing Klebsiella pneumoniae isolates make it more difficult to treatment of bacterial infections. In our study, we detected ESBL genes and investigated antimicrobial susceptibility of K. pneumoniae isolates in Chungcheong province. In addition, clonality among the isolates was analyzed by repetitive element sequence (REP)-PCR. Twenty-one of 102 K. pneumoniae isolates produced CTX-M-14 and/or CTX-M-15 and showed high level (over 70%) resistance to third cephalosporins. CTX-M type ESBL producing K. pneumoniae strains isolated in our study showed diverse clonality and some of the isolates have been disseminated in the community. Enhancing infection control will be needed to prevent dissemination of the K. pneumoniae isolates. In addition, for more effective control of resistant bacteria it is considered necessary to monitor the database constructed through convergence of biological investigation and statistical analysis of antimicrobial resistance genes.


ESBL;Klebsiella pneumoniae;CTX-M;REP-PCR;Clonality


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