Xpert CARBA-R assay for the detection of carbapenemase-producing organisms in intensive care unit patients of a Korean tertiary care hospital

Do Kyun Kim, Hyoung Sun Kim, Naina Pinto, Jongsoo Jeon, Roshan D'Souza, Myung Sook Kim, Jun Yong Choi, Dongeun Yong, Seok Hoon Jeong, Kyungwon Lee

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Abstract

Carbapenemase-producing organisms (CPO) are rapidly disseminating worldwide, and their presence in tertiary care hospitals poses a significant threat to the management of nosocomial infections. There is a need to control CPO, especially in intensive care unit (ICU) patients, because these organisms are resistant to most β-lactam antibiotics and are easily transmitted. At present, the identification of CPO is time-consuming; hence, this study focused on the use of the Xpert CARBA-R assay (Cepheid, USA) to determine intestinal colonization rates of CPO in patients admitted to the ICU of a tertiary care hospital in Korea. Forty clinical stool samples were collected and inoculated both in a CARBA-R cartridge and in conventional culture plates. The CARBA-R assay required only ~one hour to screen CPO, while the time required for conventional culture was over three days. We also found that the prevalences of intestinal colonization by carbapenem-resistant organisms and Enterobacteriaceae were 17.5% (7 out of 40) and 7.5% (3 out of 40), respectively. Among the colonizing strains, three that contained carbapenemase, including Klebsiella pneumonia carbapenemase (KPC), and imipenem (IMP) and Verona integron-mediated metallo-β-lactamase (VIM) were found. With its convenience, the Xpert CARBA-R assay can be included in CPO surveillance strategies.

Original languageEnglish
Pages (from-to)162-165
Number of pages4
JournalAnnals of laboratory medicine
Volume36
Issue number2
DOIs
Publication statusPublished - 2016 Mar

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All Science Journal Classification (ASJC) codes

  • Clinical Biochemistry
  • Biochemistry, medical

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