(i) Filarial worms species.
1. Wuchereria bancrofti,
2. Wucheria Malayai.
(i) They normally affect the lymph vessels of the lower limbs causing them to swell like that of an elephant , hence called elephantiasis.
(iii) The diasease spreads through Female Culex mosquito which is the vector . The pathogens are treansmitted to a healthy person through the bite by the female mosquito vectors.