1. State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
2. College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
3. Department of Physics and Key Laboratory of Molecular Biophysics of the Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, China
4. Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
5. Key Laboratory of Development of Veterinary Diagnostic Products, Ministry of Agriculture, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China