1 Animal Infectious Disease Laboratory, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, China.
2 Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, Jiangsu 225009, China.
3 Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, Jiangsu 225009, China. Electronic address: bao2000_cn@163.com.
4 Animal Infectious Disease Laboratory, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, China. Electronic address: wxq@yzu.edu.cn.