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Characterization of IncF plasmids carrying the blaCTX-M-14 gene in clinical isolates of Escherichia coli from Korea.

Title
Characterization of IncF plasmids carrying the blaCTX-M-14 gene in clinical isolates of Escherichia coli from Korea.
Authors
Juwon Kim;Il Kwon Bae;Kyungwon Lee;Chae Hoon Lee;Chulhun L. Chang;Seok Hoon Jeong
Issue Date
2011
Journal Title
Journal of Antimicrobial Chemotherapy
ISSN
0305-7453
Citation
Journal of Antimicrobial Chemotherapy, Vol.66(6) : 1263~1268, 2011
Abstract
OBJECTIVES: The purpose of this study was to investigate the molecular epidemiology of CTX-M-14-producing Escherichia coli clinical isolates from Korea. METHODS: A total of 138 non-duplicate E. coli clinical isolates showing reduced susceptibility or resistance to ceftazidime and/or cefotaxime were included in the study. Resistance genes, genetic environment, R plasmid size and replicon type, sequence type (ST) and XbaI-macrorestriction patterns were determined. RESULTS: Among 138 isolates, 35 were found to carry the bla(CTX-M-14) gene. The ISEcp1 element was identified in the upstream region of the bla(CTX-M-14) gene in 32 isolates. The bla(CTX-M-14) gene was located on an IncF plasmid in 21 isolates, on an IncA/C plasmid in 1 isolate, on the chromosome in 8 isolates and on both the chromosome and an IncF plasmid in 5 isolates. The most prevalent ST was ST405 (n = 8), followed by ST354 (n = 4), ST38 (n = 3), ST69 (n = 3) and the intercontinental ST, ST131 (n = 3). PFGE and multilocus sequence typing experiments demonstrated no major clonal relationship among the CTX-M-14-producing isolates. CONCLUSIONS: The bla(CTX-M-14) gene was probably mobilized by IncF plasmids, which can readily spread in E. coli, causing horizontal dissemination of the resistance gene in Korea.
URI

http://ir.ymlib.yonsei.ac.kr/handle/22282913/93026
DOI
10.1093/jac/dkr106
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Laboratory Medicine
Yonsei Authors
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