Nanjing Agricultural University (NAU) - MOE Joint International Research Laboratory of Animal Health and Food Safety, Nanjing Agricultural University (NAU) - MOE Joint International Research Laboratory of Animal Health and Food Safety, Nanjing Agricultural University (NAU) - MOE Joint International Research Laboratory of Animal Health and Food Safety, Nanjing Agricultural University (NAU) - MOE Joint International Research Laboratory of Animal Health and Food Safety, Nanjing Agricultural University (NAU) - MOE Joint International Research Laboratory of Animal Health and Food Safety, Nanjing Agricultural University (NAU) - MOE Joint International Research Laboratory of Animal Health and Food Safety, Nanjing Agricultural University (NAU) - MOE Joint International Research Laboratory of Animal Health and Food Safety, Nanjing Agricultural University (NAU) - College of Animal Science and Technology and Nanjing Agricultural University (NAU) - MOE Joint International Research Laboratory of Animal Health and Food Safety