Quercitrin provides protection against S. Typhimurium infection in mice. (A) Quercitrin improves the survival rate of mice infected with S. Typhimurium. The survival rate was analyzed by Kaplan–Meier data statistics at 144 h. (B) Colony colonization in liver, spleen, and cecum at 96 h post-infection. (C) Observation of ocular lesions in cecum of control (without infection), WT + DMSO (model without treatment) and WT + quercitrin (quercitrin treatment group). (D) Histopathological changes of cecal tissue (scale is indicated “100 μm”). * p < 0.05 compared to the control group, NS, p > 0.05, not significant.