Evaluation of the Novodiag CarbaR+, a Novel Integrated Sample to Result Platform for the Multiplex Qualitative Detection of Carbapenem and Colistin Resistance Markers.
Microb Drug Resist
; 27(2): 170-178, 2021 Feb.
Article
en En
| MEDLINE
| ID: mdl-32429736
ABSTRACT
Objectives:
This study evaluated the performance of the Novodiag® CarbaR+ an automated qualitative nucleic acid-based diagnostic assay detecting the blaVIM, blaNDM, blaIMP, blaOXA-48, blaKPC, blaOXA-23, blaOXA-58, blaOXA-24, and ISAba1 associated blaOXA-51 carbapenemase genes and colistin resistance mcr-1 gene from clinical isolates or directly from rectal swabs. Materials andMethods:
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 blaVIM-, 30 blaNDM-, 20 blaIMP-, 19 blaOXA-48-, 15 blaKPC-, 19 blaOXA-23-, 13 blaOXA-58-, 4 blaOXA-24-, 8 ISAba1-blaOXA-51-, 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.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Contexto en salud:
3_ND
Problema de salud:
3_neglected_diseases
/
3_zoonosis
Asunto principal:
Carbapenémicos
/
Colistina
/
Farmacorresistencia Bacteriana
/
Reacción en Cadena en Tiempo Real de la Polimerasa
Límite:
Humans
Idioma:
En
Revista:
Microb Drug Resist
Asunto de la revista:
MICROBIOLOGIA
/
TERAPIA POR MEDICAMENTOS
Año:
2021
Tipo del documento:
Article
País de afiliación:
Francia