Efficacy of AA against E. granulosus protoscoleces in vitro. A Protoscoleces of E. granulosus were treated with different concentrations of AA for 7 days, and the viability of the parasites was assessed by trypan blue staining. The equal amount of 40 μM ABZ and 40 μM DHA (positive), as well as 0.1% DMSO (negative) served as controls. B The effects of the different drugs on the morphology and structural integrity of protoscoleces were visualized 2 days after treatment without trypan blue staining. The scale bar corresponds to 400 μm.