Question

Which one of the following is an actively swimming, free-living and non-feeding stage of the liver- fluke?

• A. Sporocyst
• B. Rediae
• C. Cercaria
• D. Metacercaria

Answer 1

The correct option is D Metacercaria

1. Sporocyst is the larval form of parasite that develops within the germ cells and formed after multiple divisions.
2. Rediae is the larva mainly developed by trematodes and produce other generations of rediae.
3. Cercaria is the stage in which fluke is free swimming and passes from one host to another or to the final vertebrae host.
4. Metacercaria is the larva that has lost the tail and is developed inside the infective host and then hatches from the egg after coming into contact with water is in a free-living and non-feeding stage.

So the correct option is 'Metacercaria'.