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Effect of B. clausii on histopathological changes in the ileum of mice with intestinal mucositis induced by 5-FU. Photomicrographs (100×) showing the ileal segment of the control group (saline, A), B. clausii + saline (B), 5-FU (C) and 5-FU+ B. clausii (D). Black arrows indicate the presence of neutrophil infiltrate, a red arrowhead indicates the presence of vacuolated cells and a green arrowhead indicates a shortened villous.
