Figure 2.

Hydrolytic enzyme activities of the intestinal contents obtained from the rats pre-treated with antibiotics. (A) β-Glucosidase, (B) β-glucuronidase, and (C) sulfatase activities measured by using substrates, p-nitrophenyl-β-d-glucopyranoside, p-nitrophenyl-β-d-glucuronide, and p-nitrophenyl sulfate, respectively. 24 h and 48 h indicate the time of intestinal contents collected after the last treatment with antibiotics. Each bar represents the mean ± S.E. of 3 animals. An asterisk indicates the value significantly different from the corresponding 0-h control at p < 0.05 (*).