Efficacy of AA against E. multilocularis metacestodes in vivo. The images (A) and weight (B) of metacestodes resected from different treatment groups. C The level of IL-4 was detected after treatment with ABZ and AA by ELISA. Asterisks indicate scores obtained using one-way ANOVA in relation to the control group. D H&E-staining of E. multilocularis metacestodes from different treatment groups.