<prompt> Answer this question truthfullyWhat are the factors that lead to echinococcosis?  <response>: <reason> Scolex of Echinococcus granulosus from hydatid cyst. From Public Health Image Library PHIL. Photomicrograph reveals some of the ultrastructural morphology exhibited by an adult cestode, Echinococcus granulosus, found in a dog. E. granulosus causes cystic echinococcosis. From Public Health Image Library PHIL. 