1. College of Veterinary Medicine, South China Agricultural University, Guangzhou, People’s Republic of China
2. Key laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou, People’s Republic of China
3. College of Animal Science & Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, People’s Republic of China
4. Guangdong Province Key Laboratory of Waterfowl Healthy Breeding, Guangzhou, People’s Republic of China