Question

Elephantiasis is caused by
A. W. bancrofti
B. P. vivax
C. Bedbug
D. Elephant

Answer 1

Hint: A human parasitic worm that is found in the lymph nodes of humans. It is also known as a filarial worm. Humans are the natural host of this worm. This disease is transmitted through a vector (mosquito).

Complete answer: Elephantiasis is caused by Wuchereria bancrofti. It is also known as lymphatic filariasis. It is commonly transmitted from one human to another by female Culex mosquitoe. This condition is characterized by the enlargement of an area of the body, especially of the limbs. It affects the genitals. The worm causes the obstruction of the lymphatic system. This results in the fluid accumulation known as lymph in the affected individuals. Obstruction of lymphatic vessels results in a condition known as lymphedema that further leads to swelling and accumulation of lymph which is the characteristic feature of elephantiasis. Initial symptoms include lymphatic dysfunction that causes edema. It is a serious condition if not treated can lead to elephantiasis. The most common affected areas include arms and legs. The skin of the affected area becomes dry, thickened, and pebbled, ulcerated, and dark. The damage caused by elephantiasis can lead to immunodeficiency and the person is more susceptible to bacterial and fungal infections. It is also associated with non-filarial elephantiasis also known as podoconiosis.
Hence, the correct option is A-W. bancrofti.

Note: The bite of the female Culex mosquito deposits a parasite in the blood of the humans which travels through the lymphatic system and causes lymphatic filariasis.