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Expression of intestinal tight junction protein. Note: C: Control group, EC: E. coli infection group, L: Schisandrin A low dose group, M: Schisandrin A medium dose group, H: Schisandrin A high dose group, F: positive drug group. * Significant difference with control group (P < 0.05). # Significant difference with E. coli infection group (P < 0.05).
