Question

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

(a) metacercaria and cercaria

(b) miracidium and metacercaria

(c) redia and miracidium

(d) cercaria and redia

Answer 1

Correct option(b) miracidium and metacercaria  

Explanation:

Liver fluke (Fasciola hepatica) is a digenetic' endoparasite, i.e. its life cycle completes within two hosts. The primary host is sheep and the secondary or lntermediate host is fresh water gastropod. snail. Fasciola hepatica infects its intermediate host at miracidium stage and its primary host at metacercaria stage.