Figure 1

Visual assessment of liver pathology. (A) The livers of ducklings in the BC group are normal without pathological changes. (B) Extensive pathological changes can be seen in ducklings in the VC group, including fading of the liver color, swelling, and scattered hemorrhage. (E) Overt DVH is associated with opisthotonus. (C, D) Administration of icariin (C) or p-icariin (D) alleviates the pathological changes induced by DHV-1. The color of the livers in both groups is similar to those of the BC group. The extent of swelling is reduced and there are fewer hemorrhages in both groups, especially in the p-icariin group.