Write a few lines about filarial worm.

Explanation

Filariasis is caused by Wuchereria bancrofti.
(i)Commonly called filarial worm. It is found in the lymph vessels and lymph nodes of man.
(ii)Wuchereria bancrofti is sexually dimorphic viviparous and digenic . The life cycle is completed in two hosts, man and the female Culex mosquito.
(iii)The accululation of the worms block the lymphatic system resulting in inflammation of the lymph nodes.
In some cases, the obstruction of lymph vessels causes elephantiasis or filariasis of the limbs, scrotum and mammary glands.