Histopathological changes of small intestine sampled from control and G lycyrrhiza uralensis extract (GUE) treated groups. (A-C) Control piglet shows unaltered duodenum (A), jejunum (B) and ileum (C) with long and slender villi. (D-F) Piglet inoculated with RVA displays severe villi atropy and crypt hyperplasia in the duodenum (D), jejunum (E) and ileum (F). (G-I) Piglet treated with 100 mg/ml GUE exhibits slight improvement of lesion changes in the duodenum (G), jejunum (H) and ileum (I). (J-L) Piglet treated with 200 mg/ml GUE reveals moderate improvement of lesion changes in the duodenum (J), jejunum (K) and ileum (L). (M-O) Piglet treated with 400 mg/ml GUE shows markedly restored villi and crypt in the duodenum (M), jejunum (N) and ileum (O). (P-R) Piglet treated with 400 mg/ ml GUE shows unaltered duodenum (P), jejunum (Q) and ileum (R) with long and slender villi. Hematoxyline and eosin stain. Bars = 200 μm.