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

1. miracidium and metacercaria
2. redia and miracidium
3. cercaria and redia
4. metacercaria and cercaria

Correct answer: cercaria and redia

Solution

Fasciola hepatica infects its intermediate host (snail) as a miracidium and its primary host (sheep) as a metacercaria.

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