[1]State Key Laboratory of Animal Nutrition College of Animal Science and Technology China Agricultural University Beijing 10093 China;
[2]Beijing Key Laboratory of Bio-feed Additives China Agricultural University Beijing 10093 China;
[3]National Center for Veterinary Drug Safety Evaluation College of Veterinary Medicine China Agricultural University Beijing 100193 China;
Chloramphenicol; Digestive tract; Enterococci; Fermented soybean meal; Growing pigs; Probiotics; Transconjugants; vanA; Vancomycin;