1. Laboratory of Gastrointestinal Microbiology, Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
2. National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China
3. Animal Health Inspection Institute of Suzhou, Wujiang District, Suzhou 215200, China