1. Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture; National Center for Engineering Research of Veterinary Bio-products; Nanjing 210000 China
2. College of Veterinary Medicine; Nanjing Agricultural University; Nanjing 210014 China
3. Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses; Yangzhou; Jiangsu China