title: Effect of chito-oligosaccharide supplementation on the cecum microbial composition in weanling pigs
design: The control (CTR) group was the piglets fed with basal diet; the antibiotics/ZnO (AZ) treatment group was those given the basal diet supplemented with aureomycin (30 mg/kg), polymyxin E (12 mg/kg) and ZnO (3000 mg/kg); the COS group was those given the basal diet supplemented with low-molecular weight (20,000~30,000 Da) of chitosan (50 mg/kg)