Back to Search
Start Over
Evaluation of the Novodiag CarbaR+, a Novel Integrated Sample to Result Platform for the Multiplex Qualitative Detection of Carbapenem and Colistin Resistance Markers.
- Source :
-
Microbial drug resistance (Larchmont, N.Y.) [Microb Drug Resist] 2021 Feb; Vol. 27 (2), pp. 170-178. Date of Electronic Publication: 2020 May 19. - Publication Year :
- 2021
-
Abstract
- Objectives: This study evaluated the performance of the Novodiag <superscript>®</superscript> CarbaR+ an automated qualitative nucleic acid-based diagnostic assay detecting the bla <subscript>VIM</subscript> , bla <subscript>NDM</subscript> , bla <subscript>IMP</subscript> , bla <subscript>OXA-48</subscript> , bla <subscript>KPC</subscript> , bla <subscript>OXA-23</subscript> , bla <subscript>OXA-58</subscript> , bla <subscript>OXA-24</subscript> , and IS Aba 1 associated bla <subscript>OXA-51</subscript> carbapenemase genes and colistin resistance mcr-1 gene from clinical isolates or directly from rectal swabs. Materials and Methods: CarbaR+ was evaluated on 201 clinical isolates and on 100 rectal swabs (80 selected swabs from patients that were evaluated by culture method and/or Xpert Carba-R assay and 20 spiked samples). PCR-sequencing on colonies was considered as the gold standard. Results: The CarbaR+ detected all the variants of the targeted resistance genes (39 bla <subscript>VIM-</subscript> , 30 bla <subscript>NDM-</subscript> , 20 bla <subscript>IMP-</subscript> , 19 bla <subscript>OXA-48-</subscript> , 15 bla <subscript>KPC-</subscript> , 19 bla <subscript>OXA-23-</subscript> , 13 bla <subscript>OXA-58-</subscript> , 4 bla <subscript>OXA-24-</subscript> , 8 IS Aba 1- bla <subscript>OXA-51-</subscript> , and 3 mcr-1 -like genes) with sensitivity and specificity of 98.2% and 99.7%, respectively. On the 80 rectal swabs, 71 CarbaR+ results were fully concordant with the results on selective culture media (66 positive samples with 1 to 3 carbapenemases and 5 negative samples). In eight rectal swabs, CarbaR+ identified additional carbapenemase genes. One false negative result with an Escherichia coli producing-OXA-181 was observed and one CarbaR+ result for OXA-48 was in agreement with Xpert Carba-R assay, without growth on culture media. A concordance of 100% was observed on spiked samples. Conclusions: Novodiag CarbaR+ is a random-access fully automated system that achieves excellent performances for the detection of carbapenemase and/or colistin resistance determinants either from cultured clinical isolates or directly from rectal swabs in 80 minutes.
- Subjects :
- Anti-Bacterial Agents pharmacology
Bacterial Proteins genetics
Escherichia coli drug effects
Escherichia coli genetics
Humans
Microbial Sensitivity Tests
Sensitivity and Specificity
beta-Lactamases genetics
Carbapenems pharmacology
Colistin pharmacology
Drug Resistance, Bacterial drug effects
Drug Resistance, Bacterial genetics
Real-Time Polymerase Chain Reaction methods
Subjects
Details
- Language :
- English
- ISSN :
- 1931-8448
- Volume :
- 27
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Microbial drug resistance (Larchmont, N.Y.)
- Publication Type :
- Academic Journal
- Accession number :
- 32429736
- Full Text :
- https://doi.org/10.1089/mdr.2020.0132