Question

The correct sequence of various larvae in liver fluke is:

• A. Miracidium, Sporocyst, Cercaria, Redia
• B. Miracidium, Sporocyst, Redia, Cercaria
• C. Sporocyst, Redia, Miracidium, Cercaria
• D. Cercaria, Sporocyst, Redia, Miracidium

Answer 1

The correct option is B Miracidium, Sporocyst, Redia, Cercaria

Miracidium is a free-swimming ciliated larval stage in which a parasitic fluke passes from the egg to its first host which is the first larva. Sporocyst develops from miracidium. Sporocyst will produce an elongated sac known as rediae, a larval form with an oral sucker which will further form cercaria which has a tapering head with large penetration glands. The motile cercaria finds and settles in a host where it will become either an adult, or a metacercaria, or a metacercaria, according to species.

Therefore, the correct answer is option B.