Skip to main content
Article
Assessment of the performance of CHROMagar KPC and Xpert Carba-R assay for the detection of carbapenem-resistant bacteria in rectal swabs: First comparative study from Abu Dhabi, United Arab Emirates
Journal of Global Antimicrobial Resistance
  • Carole Ayoub Moubareck, Saint Joseph University; Zayed University
  • Dalal Hammoudi Halat, Saint Joseph University
  • Mohammad Sartawi, Cleveland Clinic Abu Dhabi
  • Karen Lawlor, Cleveland Clinic Abu Dhabi
  • Dolla Karam Sarkis, Saint Joseph University
  • Adnan Alatoom, Cleveland Clinic Abu Dhabi
Document Type
Article
Publication Date
3-1-2020
Abstract

© 2019 International Society for Antimicrobial Chemotherapy Objectives: The objective of this study was to evaluate the performance of CHROMagar™ KPC compared with Xpert® Carba-R assay for the detection of carbapenem-resistant bacterial isolates from rectal swabs. Methods: Rectal swabs were obtained from patients admitted to Cleveland Clinic Abu Dhabi (United Arab Emirates) over a period of 7 months and were screened for carbapenem resistance by either culture on CHROMagar KPC or carbapenemase production using the Xpert Carba-R molecular method. Further testing for carbapenem susceptibility of isolates recovered from CHROMagar KPC was performed using VITEK®2. Results: A total of 1813 rectal swabs were screened, of which 61 (3.4%) were positive for carbapenem resistance by either one or both methods. Both methods were equally efficient in detecting carbapenem resistance in 37/61 swabs (60.7%), mostly positive for Klebsiella pneumoniae (22 isolates), of which 40.9% (9/22) carried blaOXA-48-like and blaNDM. Xpert Carba-R assay detected 12 additional swabs with negative CHROMagar KPC culture and revealed additional carbapenemase-producing organisms carrying blaOXA-48-like and/or blaNDM. CHROMagar KPC recovered organisms in nine swabs not detected by the genotypic method, 44.4% of which were K. pneumoniae. Three swabs yielded false-positive results (carbapenem-susceptible organisms) by both methods. Sensitivity and specificity were, respectively, 75.4% and 99.8% for CHROMagar KPC and 80% and 99.8% for Xpert Carba-R. Conclusion: This comparative study of CHROMagar KPC versus Xpert Carba-R in rectal swabs showed a slightly higher sensitivity for the PCR-based method. Whilst CHROMagar KPC provides a less expensive screening method, Xpert Carba-R may be more accurate and faster.

Publisher
Elsevier Ltd
Disciplines
Keywords
  • Abu Dhabi,
  • Carbapenemase,
  • CHROMagar KPC,
  • Xpert Carba-R
Scopus ID

85077065244

Creative Commons License
Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International
Indexed in Scopus
Yes
Open Access
Yes
Open Access Type
Hybrid: This publication is openly available in a subscription-based journal/series
Citation Information
Carole Ayoub Moubareck, Dalal Hammoudi Halat, Mohammad Sartawi, Karen Lawlor, et al.. "Assessment of the performance of CHROMagar KPC and Xpert Carba-R assay for the detection of carbapenem-resistant bacteria in rectal swabs: First comparative study from Abu Dhabi, United Arab Emirates" Journal of Global Antimicrobial Resistance Vol. 20 (2020) p. 147 - 152 ISSN: <p><a href="https://v2.sherpa.ac.uk/id/publication/issn/2213-7165" target="_blank">2213-7165</a></p>
Available at: http://works.bepress.com/carole-ayoubmoubareck/17/