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CHEN W, LIANG Q Z, ZHANG J X, et al. Establishment of the Fluorescent RPA Constant Temperature detection method for Novel Muscovy Duck Parvovirus and its primary application [J]. Fujian Journal of Agricultural Sciences,2024,39(9):1−8
Citation: CHEN W, LIANG Q Z, ZHANG J X, et al. Establishment of the Fluorescent RPA Constant Temperature detection method for Novel Muscovy Duck Parvovirus and its primary application [J]. Fujian Journal of Agricultural Sciences,2024,39(9):1−8

Establishment of the Fluorescent RPA Constant Temperature detection method for Novel Muscovy Duck Parvovirus and its primary application

  • Received Date: 2024-05-09
  • Rev Recd Date: 2024-08-01
  • Available Online: 2024-10-22
  •   Objective  To establish a fluorescent RPA constant temperature rapid detection method for the novel Muscovy duck parvovirus (N-MDPV), providing a visual rapid detection technology for grassroots.   Method  This study used the conserved VP3 gene fragment of the novel Muscovy duck parvovirus as the target, and used EXO fluorescent probes to specifically bind to the conserved VP3 gene fragment. Specific RPA amplification primers were designed and the target gene was amplified using recombinant enzyme polymerase amplification technology. A fluorescent type of novel Muscovy duck parvovirus RPA constant temperature rapid detection method was established. Explore and adjust the optimal reaction time and temperature of the reaction system, and test the limit conditions for the specificity and sensitivity of the method. The collected nucleic acid of the disease material was used for detection, and the accuracy of the method was compared with traditional PCR and virus isolation identification methods.   Result  The optimal reaction temperature for establishing the method in this study is 39 ℃, the optimal reaction time is 30 min, and the lowest sensitivity for nucleic acid detection can reach 10 fg fg·μl−1; The nucleic acid of the novel Muscovy Duck Parvovirus was specifically amplified, but there was no cross reaction between the nucleic acid of duck adenovirus type 3, avian adenovirus type 4, duck circovirus, duck plague virus, duck viral hepatitis virus, duck Tambous virus, and novel duck reovirus, indicating good specificity; The RPA rapid detection method, traditional PCR method, and virus isolation and identification method established in this study were used to detect the nucleic acid samples of 38 collected duck tissue samples. The results showed that the positive rates were 36.8% (14/38), 36.8% (14/38), and 31.6% (12/38), respectively; The samples that tested positive for RPA showed positive results through PCR and virus isolation and identification methods, with a positive coincidence rate of 100%. The positive coincidence rate between RPA detection method and traditional PCR method in clinical sample testing is 100%.   Conclusion  This method can be well applied to the large-scale clinical sample detection of the novel muscovy duck parvovirus in grassroots areas lacking corresponding detection equipment, providing a technical means for the visual and rapid detection of the novel muscovy duck parvovirus.
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