MUC2 and Salmonella Infections: In the ileum, Salmonella infection significantly reduced Occludin (p<0.001) and Claudin (p = 0.022) gene expression, and probiotic supplementation significantly increased the mRNA expression of Occludin (p<0.001), ZO1 (p = 0.005), Mucin 2 (p<0.001), and Claudin (p = 0.051) (Table 6).