Emergence of CTX-M-12, PER-1 and OXA-30 beta-Lactamase-Producing Klebsiella pneumoniae.
- Author:
Il Kwon BAE
1
;
Yu Nae LEE
;
Seok Hoon JEONG
;
Kyungwon LEE
;
Dongeun YONG
;
Jongwook LEE
;
Seong Geun HONG
;
Eui Chong KIM
;
Yeon Jun PARK
;
Tae Yeal CHOI
;
Young UH
;
Jong Hee SHIN
;
Wee Gyo LEE
;
Ji Young AHN
;
Sung Hee LEE
;
Gun Jo WOO
;
Hyo Sun KWAK
Author Information
1. Department of Laboratory Medicine, Kosin University College of Medicine, Busan, Korea. kscpjsh@ns.kosinmed.or.kr
- Publication Type:Original Article
- Keywords:
Klebsiella pneumoniae;
CTX-M-12;
PER-1;
OXA-30;
Extended-Spectrum beta-lactamase
- MeSH:
beta-Lactamases;
Cefotaxime;
Ceftazidime;
Diffusion;
Escherichia coli;
Genotype;
Klebsiella pneumoniae*;
Klebsiella*;
Korea;
Polymerase Chain Reaction;
Prevalence
- From:Korean Journal of Clinical Microbiology
2006;9(2):102-109
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
BACKGROUND: The aim of this study was to determine a nation-wide prevalence of Ambler class A and D extended-spectrum-lactamases (ESBL) in Klebsiella pneumoniae isolates in Korea. METHODS: During the period of April to May 2005, 189 isolates of K.pneumoniae were collected from 11 Korean hospitals. Antimicrobial susceptibilities to ceftazidime and cefotaxime were tested by the disk diffusion method, and ESBL production was determined by double-disk synergy test. Determinants of ceftazidime or cefotaxime-resistance were transferred to Escherichia coli J53 (azide-resistant) by transconjugation. Genotypes of class A and D ESBL genes were determined by PCR amplification and sequencing. RESULTS: One hundred-sixty isolates of K.pneumoniae showed positive results in double-disk synergy test. The most prevalent ESBL was SHV-12 (n=148). Also detected were genes encoding ESBLs including TEM-52 (n=1), SHV-2a (n=2), CTX-M-3 (n=15), CTX-M-9 (n=6), CTX-M-12 (n=2), CTX-M-14 (n=9), CTX-M-15 (n=1), PER-1 (n=1), GES-5 (n=3), and OXA-30 (n=2) beta-lactamases. CONCLUSION: With the emergence of CTX-M-12, PER-1, and OXA-30 beta-lactamases, the ESBLs in K.pneumoniae isolates are becoming more diverse in Korea.
