Vital layer of Hydatid Cyst is: (DNB June 2010)
a. Echinococcosis is the most prevalent, serious human cestode infection in the world yet it is a zoonosis. Three species are responsible for 3 distinct clinical presentations, Echinococcus granulosus (cystic hydatid) and the more malignant E. multilocularis (alveolar hydatid) and E. vogeli (polycystic hydatid cyst).
b. With cystic hydatidosis from E. granulosus infection, the established larval cyst undergoes internal budding of daughter cysts that remain contained within the larger primary structure.
c. The host surrounds this cyst with a tough, fibrous capsule.
d. The germinal layer is responsible for asexual reproduction and also secretes the hydatid fluid which fills the cyst.