1. Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, College of Animal Science and Veterinary Medicine, Jilin University, Changchun 130062, PR China
2. Department of Animal Science Technology, Jilin Agricultural University, Changchun 130118, PR China
3. Division of Bacterial Diseases, Harbin Veterinary Research Institute, Harbin 150001, PR China
4. Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China
5. Laboratory Animal Center, Academy of Military Medical Sciences, Beijing 100071, PR China
6. Institute of Pathogen Biology, Chinese Academy of Medical Sciences, Beijing 100730, PR China