Question

Fluke occurring in human beings is
a. Fasciolopsis
b. Fasciola
c. Dugesia
d. Echinococcus

Answer 1

Hint: Flukes belongs to the phylum Platyhelminthes and it belongs to class Trematode, they are of different types and common among them are liver fluke worm or sheep liver fluke, It attacks the livers of various organisms including the humans.

Complete answer:
- Flukes are the parasitic flatworms, belong to trematodes,
- There are 10,000 species of flukes are present, and they all are range from 5 mm to several centimeters
- Flukes are present as parasites majorly in all vertebrates, especially in humans.
- If they present and attach to outside, they are called ectoparasites, and some are present inside or live in the internal organs of the host and they are called Endoparasites, and some are considered as semi as they are attached to gills are present in mouthparts, etc.
- The body is symmetrical and most of them flat, leaf-like, or ribbon-shaped.
- The body is solid and made up of spongy connective tissue.
- The digestive system consists of the mouth, which may present at the anterior, ventral, or on the posterior surface. And usually, the anus is absent.
- Most species are hermaphrodites, which means both the male and female reproductive organs are present in the same organism.
- Among the above-given options, Fasciolopsis is the large intestinal fluke that lives as a parasite in humans.
- It causes a disease called fasciolopsiasis.
- It is endemic in the parts of China, India, Taiwan, and middle east countries where pigs are raised and fed to them with freshwater plants. So it is the correct answer.
- Fasciola is the liver fluke, it causes disease in pigs and other animals, and echinococcus is called dog fluke, and digest is also fluke but not live as parasites in humans.

Hence, The correct answer is option (A).

Note: There are so many varieties of flukes, and most of them are living as parasites and some of the flukes other than given above are Chinese liver fluke, and cat liver fluke, etc. And most of them occur if the animals feed on freshwater plants.