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- W2995416826 abstract "Abstract Objectives Increased awareness of the international spread of the ceftriaxone-resistant Neisseria gonorrhoeae FC428 clone, which threatens recommended dual therapy, is essential. The objective of the present study was to develop and evaluate a rapid, simple and cost-effective method based on high-resolution melting (HRM) analysis for direct detection of the FC428 clone from clinical isolates and specimens. Methods The singleplex HRM assay was designed to identify the FC428 clone by using specific primers, which flank the alteration A311V in the penA-60.001 allele. Analytical performance was initially evaluated by testing 623 isolates and a panel of non-gonococcal strains. To ensure the method can be directly applied in clinical samples, two internal control targets (opa and porA) were also designed and included in the final multiplex HRM assay. Two hundred and eighty-two clinical samples (94 urine and 188 urethral/genital swabs) were then analysed using this multiplex HRM assay. Results The FC428 clone was easily differentiated from the non-mosaic alleles and other mosaic alleles without A311 mutations by comparing the differences in melt curves. Cross-reactivity was not observed for the penA-60.001 allele when testing 15 non-gonococcal Neisseria strains. When applied to the 623 isolates, the HRM assay successfully characterized one isolate as an FC428 clone (MLST1903, NG-MAST3435, NG-STAR233). Our data show that the multiplex HRM assay with high specificity can be directly applied in clinical samples. Conclusions This method can generate results within 90 min at a cost of less than US$0.5 per isolate or sample, making this assay an ideal tool for large epidemiological studies to enhance surveillance of the internationally transmitted ceftriaxone-resistant N. gonorrhoeae FC428 clone." @default.
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- W2995416826 date "2019-09-17" @default.
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- W2995416826 title "High-resolution melting analysis for rapid detection of the internationally spreading ceftriaxone-resistant Neisseria gonorrhoeae FC428 clone" @default.
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- W2995416826 doi "https://doi.org/10.1093/jac/dkz395" @default.
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