Foxp3 and RORγt relative mRNA and protein expression content. A — mRNA content of Foxp3 and RORγt in MLN was determined using quantitative PCR; B — Foxp3 and RORγt protein expression in MLN was determined by western blot analysis, Lamin B was detected as a normalization control. Control: control group, the mice were administered normal saline. Group A: enteritis group, the mice were administered 0.2 mL 2.0 × 108 cfu/mL ETEC K88 daily for 3 d. Group B: intervention group, the mice were administered 2.0 × 108 cfu/mL L. casei for 7 d, then 2.0 × 108 cfu/mL ETEC K88 for 3 d. Results are expressed as mean ± SD of the 6 mice in each group. a Results are statistically significant at P < 0.05.