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• W2010224978 abstract "In the United States, the production of the Klebsiella pneumoniae carbapenemase (KPC) is an important mechanism of carbapenem resistance in Gram-negative pathogens. Infections with KPC-producing organisms are associated with increased morbidity and mortality; therefore, the rapid detection of KPC-producing pathogens is critical in patient care and infection control. We developed a real-time PCR assay complemented with traditional high-resolution melting (HRM) analysis, as well as statistically based genotyping, using the Rotor-Gene ScreenClust HRM software to both detect the presence of bla(KPC) and differentiate between KPC-2-like and KPC-3-like alleles. A total of 166 clinical isolates of Enterobacteriaceae, Pseudomonas aeruginosa, and Acinetobacter baumannii with various β-lactamase susceptibility patterns were tested in the validation of this assay; 66 of these organisms were known to produce the KPC β-lactamase. The real-time PCR assay was able to detect the presence of bla(KPC) in all 66 of these clinical isolates (100% sensitivity and specificity). HRM analysis demonstrated that 26 had KPC-2-like melting peak temperatures, while 40 had KPC-3-like melting peak temperatures. Sequencing of 21 amplified products confirmed the melting peak results, with 9 isolates carrying bla(KPC-2) and 12 isolates carrying bla(KPC-3). This PCR/HRM assay can identify KPC-producing Gram-negative pathogens in as little as 3 h after isolation of pure colonies and does not require post-PCR sample manipulation for HRM analysis, and ScreenClust analysis easily distinguishes bla(KPC-2-like) and bla(KPC-3-like) alleles. Therefore, this assay is a rapid method to identify the presence of bla(KPC) enzymes in Gram-negative pathogens that can be easily integrated into busy clinical microbiology laboratories." @default.
• W2010224978 created "2016-06-24" @default.
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• W2010224978 date "2012-10-17" @default.
• W2010224978 modified "2023-09-24" @default.
• W2010224978 title "Rapid Detection and Statistical Differentiation of KPC Gene Variants in Gram-Negative Pathogens by Use of High-Resolution Melting and ScreenClust Analyses" @default.
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• W2010224978 doi "https://doi.org/10.1128/jcm.02193-12" @default.
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