Journal of Veterinary Science

The Korean Society of Veterinary Science (대한수의학회)
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Development of a ladder-shape melting temperature isothermal amplification (LMTIA) assay for detection of African swine fever virus (ASFV)

  • Wang, Yongzhen (Key Laboratory of Biomarker Based Rapid-Detection Technology for Food Safety of Henan Province, Xuchang University) ;
  • Wang, Borui (School of Food and Biological Engineering, Henan University of Science and Technology) ;
  • Xu, Dandan (School of Food and Biological Engineering, Henan University of Science and Technology) ;
  • Zhang, Meng (School of Food and Biological Engineering, Henan University of Science and Technology) ;
  • Zhang, Xiaohua (Key Laboratory of Biomarker Based Rapid-Detection Technology for Food Safety of Henan Province, Xuchang University) ;
  • Wang, Deguo (Key Laboratory of Biomarker Based Rapid-Detection Technology for Food Safety of Henan Province, Xuchang University)
  • Received : 2022.01.01
  • Accepted : 2022.04.12
  • Published : 2022.07.31
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Abstract

Background: Due to the unavailability of an effective vaccine or antiviral drug against the African swine fever virus (ASFV), rapid diagnosis methods are needed to prevent highly contagious African swine fever. Objectives: The objective of this study was to establish the ladder-shape melting temperature isothermal amplification (LMTIA) assay for the detection of ASFV. Methods: LMTIA primers were designed with the p72 gene of ASFV as the target, and plasmid pUC57 was used to clone the gene. The LMTIA reaction system was optimized with the plasmid as the positive control, and the performance of the LMTIA assay was compared with that of the commercial real-time polymerase chain reaction (PCR) kit in terms of sensitivity and detection rate using 200 serum samples. Results: Our results showed that the LMTIA assay could detect the 104 dilution of DNA extracted from the positive reference serum sample, which was the same as that of the commercial real-time PCR kit. The coincidence rate between the two assays was 100%. Conclusions: The LMTIA assay had high sensitivity, good detection, and simple operation. Thus, it is suitable for facilitating preliminary and cost-effective surveillance for the prevention and control of ASFV.

Keywords

Acknowledgement

The authors thank all members of the Key Laboratory of Biomarker Based Rapid-detection Technology for Food Safety of Henan Province, China, and Henan Tuodao Biotechnology Co., Ltd., China, for providing the genomic DNAs extracted from swine serum samples.

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