In order to explore the effects of chitosan on intestinal barrier of weanling pigs, thirty piglets with an average body weight of （6.62±0.59） kg were challenged with enterotoxigenic Escherichia coli （10^9 cell per head） during preliminary trial period and randomly assigned to three treatment groups, a basal diet was added in control group, 50 mg·kg^-1 chlortetracycline, 300 mg·kg^-1 ehitosan were added in the experimental groups, respectively, for 21 d. The results showed that, compared with the control group, chitosan could decrease the...
