Acta Veterinaria et Zootechnica Sinica ›› 2023, Vol. 54 ›› Issue (11): 4745-4753.doi: 10.11843/j.issn.0366-6964.2023.11.028

• PREVENTIVE VETERINARY MEDICINE • Previous Articles     Next Articles

Establishment and Preliminary Application of LAMP-LFD Detection Method for Bovine Viral Diarrhea Virus

ZHENG Ruwen1, HUANG Tao1*, WU Daoyi2, YU Guangmei1, LI Fangfang1, SUI Xin1, MIN Tingyu1   

  1. 1. College of Animal Science, Guizhou University, Guiyang 550025, China;
    2. Bijie Animal Husbandry and Veterinary Science Research Institute, Bijie 551700, China
  • Received:2023-03-06 Online:2023-11-23 Published:2023-11-26

Abstract: In order to establish a specific, sensitive, rapid and simple detection method for bovine viral diarrhea virus (BVDV), four loop-mediated isothermal amplification (LAMP) specific primers and one DNA probe labeled with fluorescein isothiocyanate were designed according to the conserved segment of BVDV 5'UTR sequence by combining loop-mediated isothermal amplification (LAMP) with lateral flow dipstick(LFD). By optimizing the reaction temperature, reaction time, ratio of internal and external primer concentrations, Bst DNA 2.0 polymerase concentration, dNTP Mix concentration, Mg2+ concentration, etc., the specificity and detection sensitivity of this method were analyzed, and 52 clinical samples were tested. A LAMP-LFD method for detecting BVDV was established. LAMP-LFD detection technology can specifically detect BVDV, but foot-and-mouth disease virus, bovine epidemic fever virus, and bovine herpesvirus type 1 have not been detected. The sensitivity of LAMP-LFD is high, and the minimum detection concentration is 1.9×101 copies·μL-1. Both LAMP-LFD and PCR detection methods detected 5 positive samples, with a coincidence rate of 100%. The LAMP-LFD method for rapid detection of BVDV was successfully established in this experiment. The detection method has the advantages of short detection time, strong specificity, simple operation and high sensitivity, and can be used as a new detection method for grassroots detection.

Key words: infectious disease, BVDV, loop-mediated isothermal amplification, transverse flow test strip

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