Question

During its life-cycle, Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following larval stages respectively:

• A. Miracidium and metacercaria
• B. Redia and miracidium
• C. Cercariae and redia
• D. Metacercaria and cercariae

Answer 1

The correct option is B Redia and miracidium

When in contact with water, the egg capsule of Fasciola hepatica forms a non-feeding larvae miracidium. Miracidium enters the body of the snail to form sporocyst. The sporocyst develops into redia. Redia form cercariae and come out of snails. They get encysted forming metacercaria.