Abstract
Carbapenemase-producing organisms (CPOs) pose a serious clinical threat and rapid detection tools are essential to aid in patient management. We developed rapid and simple molecular tests to detect blaNDM-type and blaVIM-type carbapenemase genes using recombinase polymerase amplification (RPA) combined with a lateral flow detection. The tests could provide results in approximately 15 min when using DNA extracts, with limits of detection of 9.2 copies/μl for the blaNDM-type assay and 7.5 copies/μl for blaVIM-type assay, and successfully detected all isolates harbouring the carbapenemase encoding genes in a panel of 57 isolates. These RPA tests may be suitable for use in low-resource settings to tailor rapid implementation of infection control precautions and antibiotic stewardship.
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Acknowledgements
We thank Dr. Nicole Ertl, Dr. Cameron Buckley, Ms. Bushra Alharbi, Ms. Amanda Bordin, Dr. Kym Lowry, and Ms. Carolyn Pardo for their technical support.
Funding
This study was funded by the Children’s Hospital Foundation Innovator grant 50272. JM is the founder and a shareholder of BioCifer Pty Ltd, who was not involved in the study. PNAH has received research grants from MSD, Sandoz and Shionogi, as well as speaker’s fees from Pfizer and has served on an advisory board for Sandoz outside the submitted work. DLP has received research funding from Pfizer, Merck, and Shionogi and funding for advisory boards or speaking engagements from Merck, Pfizer, BioMerieux, Sumitomo, Accelerate, QPex, and Entasis, unrelated to this work. DMW reports research funding from SpeeDx Pty Ltd unrelated to the study. ADI has received research funding and teaching honoraria from Gilead Sciences inc. unrelated to this work. AKSA, ET, CYTW and CH, and HMZ have no competing interests to declare.
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Conceptualization: HZ, AI, JM, PH, CH, and DW. Methodology: AA, CW, JM, ET, and DW. Data analysis: AA, JM, and DW. Writing—initial draft: AA and DW. Writing—review and editing: DW, PH, AI, JM, HZ, CH, ET, DP.
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Ethical approval for this work has been provided by the human research ethics committee at The University of Queensland HREC, approval 2018000615.
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Ayfan, A.K.S., Macdonald, J., Harris, P.N.A. et al. Rapid detection of NDM and VIM carbapenemase encoding genes by recombinase polymerase amplification and lateral flow–based detection. Eur J Clin Microbiol Infect Dis 40, 2447–2453 (2021). https://doi.org/10.1007/s10096-021-04267-6
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DOI: https://doi.org/10.1007/s10096-021-04267-6