1. State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
2. Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center of Sustainable Pig Production, Huazhong Agricultural University, Wuhan, China
3. Huazhong Agricultural University hospital, Huazhong Agricultural University, Wuhan, China
4. College of Food Science and Technology, Huazhong Agricultural University, Wuhan, China