<prompt> Adult form of Echinococcus is found in:DogHumansSheepFelines  <response>: The adult forms of Echinococcus Granulosus 3 to 6 mm long resides in the small bowel of the definitive hosts dog or other canids. Humans are accidental hosts and human echinococcosis hydatid disease is caused by the larval stages of Cestodes tapeworms of the genus Echinococcus. Adult form of Echinococcus Adult wormMature Cestode : Lives in the small intestine of the definitive host. Definitive host: Dogsfoxesother canines.Dog is the principle definitive host Embryonated eggs are passed in the feces of Definitive host. Eggs ingested by intermediate host sheep, cattle, Goat, swine. Intermediate hosts for the parasite, enable the worms to develop, but not to pass infectious eggs. Eggs ingested by Accidental host humans. Accidental intermediate hosts also enable the worms to develop, but not to pass infectious eggs. They fuher usually represent dead end for the parasite. Egg shell disintegrates Egg hatches and each egg released ;an embryo; called Oncosphere Oncosphere penetrates intestinal wall and enters blood strain where it is distributed to various tissues LiverLungBrain Once the Oncosphere arrive in their end organs they gradually develop into fluid filled cysts called Hydatid cysts. Hydatid cysts represent parasitic larval stages in their viscera. The innermost layer of the Hydatid cyst contains germinal membrane from which offsprings will bud. The offsprings are called protoscolices because they contain the hooklets and suckers found in the scolex of adult however, the protoscolices are folded in upon themselves.invaginated No fuher development happens in the intermediate hosts. Completion of the life cycle depends upon consumption of invaginated protoscolioces by canines when they feed upon cysts in raw organ meat offal Consumption of INFECTED RAW organ meatoffal Ref: Medical parasitology by Arora and Arora 4th edition pgno: 145 