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Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Clin+Microbiol+Infect 2020 ; 26 (8): 1076-1081 Nephropedia Template TP
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Multiple-centre clinical evaluation of an ultrafast single-tube assay for SARS-CoV-2 RNA #MMPMID32422410
Wang J; Cai K; He X; Shen X; Wang J; Liu J; Xu J; Qiu F; Lei W; Cui L; Ge Y; Wu T; Zhang Y; Yan H; Chen Y; Yu J; Ma X; Shi H; Zhang R; Li X; Gao Y; Niu P; Tan W; Wu G; Jiang Y; Xu W; Ma X
Clin Microbiol Infect 2020[Aug]; 26 (8): 1076-1081 PMID32422410show ga
OBJECTIVE: To evaluate the performance of an ultrafast single-tube nucleic acid isothermal amplification detection assay for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA using clinical samples from multiple centres. METHODS: A reverse transcription recombinase-aided amplification (RT-RAA) assay for SARS-CoV-2 was conducted within 15 minutes at 39 degrees C with portable instruments after addition of extracted RNA. The clinical performance of RT-RAA assay was evaluated using 947 clinical samples from five institutions in four regions of China; approved commercial fluorescence quantitative real-time PCR (qRT-PCR) kits were used for parallel detection. The sensitivity and specificity of RT-RAA were compared and analysed. RESULTS: The RT-RAA test results of 926 samples were consistent with those of qRT-PCR (330 were positive, 596 negative); 21 results were inconsistent. The sensitivity and specificity of RT-RAA was 97.63% (330/338, 95% confidence interval (CI) 95.21 to 98.90) and 97.87% (596/609, 95% CI 96.28 to 98.81) respectively. The positive and negative predictive values were 96.21% (330/343, 95% CI 93.45 to 97.88) and 98.68% (596/604, 95% CI 97.30 to 99.38) respectively. The total coincidence rate was 97.78% (926/947, 95% CI 96.80 to 98.70), and the kappa was 0.952 (p < 0.05). CONCLUSIONS: With comparable sensitivity and specificity to the commercial qRT-PCR kits, RT-RAA assay for SARS-CoV-2 exhibited the distinctive advantages of simplicity and rapidity in terms of operation and turnaround time.
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Clin+Microbiol+Infect 2020 ; 26 (8): 1076-1081
