Echinococcus granulosus ⑥Scoleces from Egg (30-38μm) cyst attach to ①Adult tapeworm intestine and releases eggs, grow into which are adults excreted by definitive host Scolex (a)Adult tapeworm ⑤Definitive host eats inter- Larvae develop mediate into hydatid host, Definitive host cysts ingesting Brood capsule cysts Scolex Larva ②Intermediate host ingests ③Eggs hatch,and eggs Hydatid larvae migrate to liver or lungs cyst Intermediate host (b)Life cycle Intermediate host Figure 12.28Echinococcus granulosus Figure 12.28