Acta Veterinaria et Zootechnica Sinica ›› 2025, Vol. 56 ›› Issue (12): 6299-6307.doi: 10.11843/j.issn.0366-6964.2025.12.032

• PREVENTIVE VETERINARY MEDICINE • Previous Articles     Next Articles

Colloidal Gold Test Strip for Rapid Detection of Chicken Infectious Bronchitis Virus based on Recombinase Polymerase Amplification

GUO Pengyu1,2,3,4, TANG Ye1,2,3,4, MA Lihua1,2,3,4, MENG Xianchen1,2,3,4, ZHAO Zhehong1,2,3,4, XIE Quan1,2,3,4, LI Tuofan1,2,3,4, WAN Zhimin1,2,3,4, SHAO Hongxia1,2,3, QIN Aijian1,2,3, YE Jianqiang1,2,3,4*   

  1. 1. Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China;
    2. Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, China;
    3. Institute of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China;
    4. Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
  • Received:2025-02-18 Published:2025-12-24

Abstract: Infectious bronchitis is an acute and highly contagious respiratory disease caused by infectious bronchitis virus (IBV). In order to establish a suitable method for the field detection of IBV, we designed primers and probes targeting M, a conserved gene of IBV, and combined RPA and colloidal gold technology to create an RPA-test strip method for IBV detection within 1 hour. The specificity test demonstrated that the RPA-test strip method only detected IBV, but did not react with the avian influenza virus (AIV), chicken bursal disease virus (IBDV), Newcastle disease virus (NDV), avian leukosis virus (ALV), and goose astrovirus (GAstV). The sensitivity test proved that the lowest detection line of this RPA-test strip method was 8.26 TCID50·mL-1. Comparison of 31 clinical samples showed that the positive detection rates of this RPA-strip method, qPCR and conventional PCR were 74.2%, 64.5% and 54.8%, respectively. The above data showed that the RPA-strip method for the rapid detection of IBV established in this study is highly specific, sensitive and easy to operate, which provides a new method and technology for the efficient diagnosis of IBV and its immunological prevention and control.

Key words: infectious bronchitis virus, M gene, RPA, colloidal gold immunochromatographic test strip

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