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Dissemination of CTX-M Type Extended-Spectrum -Lactamases and Emergence of CTX-M-12 in Escherichia coli

Other Title
CTX-M형 Extended-Spectrum -Lactamase 생성 Escherichia coli의 확산 및 CTX-M-12의 출현
Authors
오, 지은; 홍, 종식; 배, 일권; 송, 은향; 정, 석훈; 이, 경원; 용, 동은; 이, 종욱; 이, 위교; 강, 정옥; 안, 지영; 홍, 성근; 신, 종희; 어, 영; 박, 연준; 김, 의종; 곽, 효선; 우, 건조
Citation
Annals of laboratory medicine, 25(4):252-258, 2005
Journal Title
Annals of laboratory medicine
ISSN
2234-38062234-3814
Abstract
Background : Clinical isolates of Escherichia coli were evaluated to determine the prevalence and genotypes of Ambler class A extended-spectrum -lactamases (ESBLs)



Methods : Clinical isolates of E. coli were collected from 12 hospitals from February through July, 2004. Antimicrobial susceptibility was tested by disk diffusion and agar dilution methods, and ESBLproduction was determined by double-disk synergy test. TEM, SHV, CTX-M, PER-1, VEB, IBC, GES, and TLA type ESBL genes were detected by PCR amplifications, and the PCR products were subjected to direct sequencing.



Results : The double-disk synergy test was positive in 90.9% (149 in 164) of the ceftazidime- or cefotaxime-resistant E. coli isolates. The most prevalent types of Ambler class A ESBLs in E. coli isolates were CTX-M-15 (n=53). CTX-M-14 (n=24), CTX-M-3 (n=9), CTX-M-9 (n=3), CTX-M-12 (n=3), SHV-2a (n=1), SHV-12 (n=5) and TEM-52 (n=3) were also found. CTX-M-12 ESBL had never been reported before in Korea.



Conclusion : CTX-M type ESBL-producing E. coli isolates are spreading and CTX-M-12 is emerging in Korea.
Keywords
Escherichia coliExtended-spectrum -lactamaseCTX-M-12CTX-M-14CTX-M-15
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Journal Papers > School of Medicine / Graduate School of Medicine > Laboratory Medicine
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