1. The State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
2. College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
3. Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana, United States of America
4. College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
5. Key Laboratory of Development of Veterinary Diagnostic Products, Ministry of Agriculture, Wuhan, China
6. International Joint Research and Training Centre for Veterinary Epidemiology, Hubei Province, Wuhan, China