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Disk Carbapenemase Test for the Rapid Detection of KPC-, NDM-, and Other Metallo-β-Lactamase-Producing Gram-Negative Bacilli

Authors
 Hyunsoo Kim  ;  Ji Yeon Sung  ;  Dongeun Yong  ;  Seok Hoon Jeong  ;  Wonkeun Song  ;  Kyungwon Lee  ;  Yunsop Chong 
Citation
 Annals of Laboratory Medicine, Vol.36(5) : 434-440, 2016 
Journal Title
 Annals of Laboratory Medicine 
ISSN
 2234-3806 
Issue Date
2016
MeSH
Anti-Bacterial Agents/pharmacology* ; Bacterial Proteins/metabolism* ; Bromthymol Blue/chemistry ; Drug Resistance, Bacterial ; Gram-Negative Bacteria/drug effects ; Gram-Negative Bacteria/enzymology* ; Imipenem/pharmacology ; Microbial Sensitivity Tests/methods* ; Paper ; beta-Lactamases/metabolism*
Keywords
Disk carbapenemase test ; KPC-type carbapenemase ; Metallo-β-lactamase ; NDM-type carbapenemase
Abstract
BACKGROUND: Rapid detection of carbapenemase-producing gram-negative bacilli (GNB) is required for optimal treatment of infected patients. We developed and assessed a new disk carbapenemase test (DCT). METHODS: Paper disks containing 0.3 mg of imipenem and bromothymol blue indicator were developed, and the performance of the DCT were evaluated by using 742 strains of GNB with or without carbapenemases. RESULTS: The paper disks were simple to prepare, and the dried disks were stable at -20°C and at 4°C. The DCT detected 212 of 215 strains (98.6% sensitivity with 95% confidence interval [CI] 96.0-99.5%) of GNB with known class A (KPC and Sme) and class B (NDM, IMP, VIM, and SIM) carbapenemases within 60 min, but failed to detect GES-5 carbapenemase. The DCT also detected all two Escherichia coli isolates with OXA-48, but failed to detect GNB with OXA-232, and other OXA carbapenemases. The DCT showed 100% specificity (95% CI, 99.2-100%) in the test of 448 imipenem-nonsusceptible, but carbapenemase genes not tested, clinical isolates of GNB. CONCLUSIONS: The DCT is simple and can be easily performed, even in small laboratories, for the rapid detection of GNB with KPC, NDM and the majority of IMP, VIM, and SIM carbapenemases.
Files in This Item:
T201602992.pdf Download
DOI
10.3343/alm.2016.36.5.434
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Laboratory Medicine (진단검사의학교실) > 1. Journal Papers
Yonsei Authors
김현수(Kim, Hyun Soo)
용동은(Yong, Dong Eun) ORCID logo https://orcid.org/0000-0002-1225-8477
이경원(Lee, Kyungwon) ORCID logo https://orcid.org/0000-0003-3788-2134
정석훈(Jeong, Seok Hoon) ORCID logo https://orcid.org/0000-0001-9290-897X
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URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/151861
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