In this study, eight weeks after infection, all of infected sheep had cystic echinococcosis in the liver as evidenced by the presence of hepatic liver lesions, exhibiting the same morphology including a central parasitic vesicle of approximately 0.2-0.5 cm of diameter, and surrounded by a white periparasitic inflammatory corona (S1 Fig). The control counterparts neither pre-sented macroscopically nor microscopically visible lesions in the liver.