Abstract
Avian influenza virus (AIV) infection can lead to severe economic losses in the poultry industry and causes a serious risk for humans. A rapid and simple test for suspected viral infection cases is crucial. In this study, a reverse transcription recombinase-aided amplification assay (RT-RAA) for the rapid detection of all AIV subtypes was developed. The reaction temperature of the assays is at 39 °C and the detection process can be completed in less than 20 min. The specificity results of the assay showed that this method had no cross-reaction with other main respiratory viruses that affect birds, including Newcastle disease virus (NDV) and infectious bronchitis virus (IBV). The analytical sensitivity at a 95% confidence interval was 102 RNA copies per reaction. In comparison with a published assay for reverse transcription quantitative real-time polymerase chain reaction (RT-qPCR), the κ value of the RT-RAA assay in 384 avian clinical samples was 0.942 (p < 0.001). The sensitivity and specificity of the RT-RAA assay for avian clinical sample detection was determined as 97.59% (95% CI 93.55–99.23%) and 96.79% (95% CI 93.22–98.59%), respectively. The RT-RAA assay for AIV in this study provided an effective and practicable tool for AIV molecular detection.
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This work was supported by the National Key Research and Development Program of China [2017YFC120050].
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KW, SW, QZ, NJ and FZ: contributed to experiment setting, data analysis, writing of the original draft; SW, QZ, KW, NJ, FZ, YL and XY: contributed to design of the experiments and supervision and writing; SW, QZ, NJ, FZ, YL, XY, JL, GH, LY, QC and RZ: contributed to data collection and analysis; QZ, SW, KW, NJ and FZ: contributed to experiment support and writing; SW, QZ, KW, FS and ZP: contributed to provided comments on the data and manuscript. All authors read and approved the final manuscript.
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Wang, S., Zhuang, Q., Jiang, N. et al. Reverse transcription recombinase-aided amplification assay for avian influenza virus. Virus Genes 59, 410–416 (2023). https://doi.org/10.1007/s11262-023-01979-z
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DOI: https://doi.org/10.1007/s11262-023-01979-z