期刊
CLINICAL CHEMISTRY
卷 67, 期 5, 页码 736-741出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/clinchem/hvaa323
关键词
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资金
- French Defence Innovation Agency-Agence de l'Innovation de Defense [2020 68 0918 00 00 00 00]
- Rouen University Hospital
- Ministre des armees
The newly developed multiplex RT-ddPCR assay showed higher sensitivity in COVID-19 diagnosis compared to traditional methods, especially in saliva samples. It can serve as a complementary tool to control ambiguous results from RT-qPCR and enable repetitive sampling with saliva when nasopharyngeal swabbing is not possible.
BACKGROUND: Reverse transcription-quantitative PCR on nasopharyngeal swabs is currently the reference COVID19 diagnosis method but exhibits imperfect sensitivity. METHODS: We developed a multiplex reverse transcription-digital droplet PCR (RT-ddPCR) assay, targeting 6 SARS-CoV-2 genomic regions, and evaluated it on nasopharyngeal swabs and saliva samples collected from 130 COVID-19 positive or negative ambulatory individuals, who presented symptoms suggestive of mild or moderate SARS-CoV2 infection. RESULTS: For the nasopharyngeal swab samples, the results obtained using the 6-plex RT-ddPCR and RTqPCR assays were all concordant. The 6-plex RTddPCR assay was more sensitive than RT-qPCR (85% versus 62%) on saliva samples from patients with positive nasopharyngeal swabs. CONCLUSION: Multiplex RT-ddPCR represents an alternative and complementary tool for the diagnosis of COVID-19, in particular to control RT-qPCR ambiguous results. It can also be applied to saliva for repetitive sampling and testing individuals for whom nasopharyngeal swabbing is not possible.yy
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