Hua S, Wang J, Zhao Z, Tian F, Zhao M, Wang Y, Zhang R, Han Z, Gao S, Lv X, Li H, Shen X, Ma X, Feng Z. A Multiplex Recombinase-Aided qPCR Assay for Highly Sensitive and Rapid Detection of khe, bla
KPC -2, and bla
NDM -1 Genes in Klebsiella pneumoniae.
J Clin Lab Anal 2024;
38:e25038. [PMID:
38590133 PMCID:
PMC11137842 DOI:
10.1002/jcla.25038]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 03/08/2024] [Accepted: 03/26/2024] [Indexed: 04/10/2024] Open
Abstract
OBJECTIVE
This study aimed to establish a highly sensitive and rapid single-tube, two-stage, multiplex recombinase-aided qPCR (mRAP) assay to specifically detect the khe, blaKPC-2, and blaNDM-1 genes in Klebsiella pneumoniae.
METHODS
mRAP was carried out in a qPCR instrument within 1 h. The analytical sensitivities of mRAP for khe, blaKPC-2, and blaNDM-1 genes were tested using recombinant plasmids and dilutions of reference strains. A total of 137 clinical isolates and 86 sputum samples were used to validate the clinical performance of mRAP.
RESULTS
mRAP achieved the sensitivities of 10, 8, and 14 copies/reaction for khe, blaKPC-2, and blaNDM-1 genes, respectively, superior to qPCR. The Kappa value of qPCR and mRAP for detecting khe, blaKPC-2, and blaNDM-1 genes was 1, 0.855, and 1, respectively (p < 0.05).
CONCLUSION
mRAP is a rapid and highly sensitive assay for potential clinical identification of khe, blaKPC-2, and blaNDM-1 genes in K. pneumoniae.
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