Which stage of Fasciola hepatica is infective to grazing livestock?
Correct answer: B. Metacercaria
- A. Miracidium
- B. Metacercaria
- C. Cercaria
- D. Sporocyst
Explanation
The metacercaria is the encysted infective stage attached to aquatic vegetation. Livestock become infected when they eat contaminated plants, whereas miracidia and cercariae develop during earlier stages in the snail host.
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Covers protozoa, helminths and arthropods that infect domestic animals, including their morphology, life cycles, hosts, transmission and clinical effects. Questions connect parasite identification with diagnosis, prevention and treatment, and distinguish endoparasites from ectoparasites and definitive hosts from intermediate hosts.
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