Miracidium is a larval stage in the development of
A. Taenia solium
B. Fasciola hepatica
C. Ascaris
D. Echinococcus
B. Fasciola hepatica
B. Fasciola hepatica
To determine the correct answer, we need to understand the development stages of each of the given organisms. Let's break down the options:
A. Taenia solium: Taenia solium is a tapeworm species that causes pork tapeworm infection in humans. It does not have a miracidium stage in its life cycle.
B. Fasciola hepatica: Fasciola hepatica is a liver fluke parasite that infects various mammals, including humans. It does have a miracidium stage in its life cycle.
C. Ascaris: Ascaris is a genus of roundworms that infects the intestines of animals, including humans. It does not have a miracidium stage in its life cycle.
D. Echinococcus: Echinococcus is a genus of tapeworms that forms hydatid cysts in the organs of mammals, including humans. It does not have a miracidium stage in its life cycle.
Based on the information above, the larval stage called miracidium is found in the development of Fasciola hepatica. Therefore, the correct answer is B. Fasciola hepatica.