Question

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

• A. Redia and miracidium
• B. Cercaria and redia
• C. Metacercaria and cercaria
• D. Miracidium and metacercaria

Answer 1

The correct option is A Redia and miracidium

Fasciola Hepatica is a digenetic parasite. It completes its life history in sheep and fresh water snail.sheep is the primary host and snail acts as an intermediate host. When in contact with water, the egg capsule from nonfeeding larval miracidium enters the body of snail to form sporocyst. The sporocyst develops into redia. Redia forms cercaria and comes out of snail. They get encysted forming metacercaria.