Quantification of histologic parameters collected from individual wild-type mice before, during, and after DSS treatment. H&E-stained colon sections were collected as described in Figure 2 and scored in a blinded manner by a board-certified veterinary pathologist. (A, B) Epithelial damage was scored as: 0) no damage; 1) discrete focal lymphoepithelial lesions; 2) mucosal erosion; or 3) mucosal erosion with submucosal damage. (C, D) Leukocyte infiltration was scored as: 0) rare inflammatory cells in the lamina propria; 1) inflammatory cells throughout most of the lamina propria; 2) inflammatory cells extending into the submucosa; or 3) transmural extension of inflammatory cells. * p < 0.05, ** p < 0.01; Mann Whitney test; n.s., not significant.