1. Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, College of Animal Science, Jilin University, Changchun, People's Republic of China.
2. Institute of Military Veterinary, Academy of Military Sciences, Changchun, People's Republic of China.
3. Changchun University of Chinese Medicine, Changchun, People's Republic of China.
4. School of Life Sciences and Engineering, Foshan University, Foshan, People's Republic of China.