کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2815314 1159864 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tracing of false negative results in phenotypic methods for identification of carbapenemase by Real-time PCR
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی ژنتیک
پیش نمایش صفحه اول مقاله
Tracing of false negative results in phenotypic methods for identification of carbapenemase by Real-time PCR
چکیده انگلیسی


• Gene expression did not have effect on the negative responses observed in detecting carbapenemase using phenotypic methods.

BackgroundCarbapenemase production causes multi antibiotics resistant in Gram-negative bacteria. A simple rapid and accurate phenotypic test for detection of Gram-negative carbapenemase-producing bacteria is useful for the treatment of infections. The aim of this study was to track the negative results in carbapenemase phenotypic test by Real-time PCR.Materials and MethodsIn this study, 161 imipenem resistant Gram-negative bacteria were surveyed. Modified Hodge Test (MHT), boronic acid (BA), EDTA and dipicolinic acid were used for detection of Klebsiella pneumoniae carbapenemase (KPC) and metallo-beta-lactamase (MBLs). Different phenotypic methods and PCR confirmation followed by Real-time PCR for determination of phenotypic false-negative results were used.ResultsOur results indicated that 85, 51 and 112 strains were MHT, BA and dipicolinic acid positive, respectively. No synergistic effect was observed between imipenem and EDTA. Sixty-nine strains were confirmed as carbapenemase-producers according to the results of molecular tests. All of the isolates carried the gene and expressed carbapenemase.ConclusionComparison between the results of phenotypic and genotypic methods showed that the phenotypic methods could be used as the primary screening and the PCR remains as the gold standard for detection of carbapenemase positive strains.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gene - Volume 576, Issue 1, Part 1, 15 January 2016, Pages 166–170
نویسندگان
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