1. College of Animal Science and Technology, College of Veterinary Medicine, Zhejiang A & F University, Hangzhou, China
2. OIE Reference Lab for Swine Streptococcosis, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
3. Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
4. College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China