1. College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, People’s Republic of China
2. OIE Reference Lab for Swine Streptococcosis, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, People's Republic of China
3. Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, People's Republic of China
4. Key Laboratory of Animal Bacteriology, Ministry of Agriculture, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, People's Republic of China
5. Sanya Institute of Nanjing Agricultural University, Nanjing Agricultural University, Sanya, People’s Republic of China