Question

Filaria is transmitted through/secondary host of Wuchereria is?
A. Anopheles
B. Culex
C. Tse-tse-fly
D. Sandfly

Answer 1

Filariasis is a parasitic disease caused by roundworm infection. Bloodsucking insects such as mosquitoes and black flies - transmit the condition. Filariasis is primarily caused by three thread-like worm species, only adult worms are found in the human body, about 120 million people in almost 72 countries are infected and affect Asia, Africa, and South America.

Complete answer:
W. Bancrofti performs its life cycle in two hosts. Humans serve as the definitive host and the intermediate host is mosquitoes. The lymphatics of the human host exist in the adult parasites. The first-stage larvae are present in the circulation, known as microfilariae. Microfilariae are primarily present in the peripheral blood. Microfilariae are passed to a vector that is the most common species of mosquitoes in the Culex, Anopheles, Mansonia, and Aedes genera. The microfilariae mature within the mosquito into motile larvae called juveniles, which migrate to the labium after a period of about 10 days. When the mosquito infected has its next meal of blood, W. bancrofti are introduced onto the skin of the prospective host from the mouthparts and move into the bloodstream of the new human host through micro-cuts in the dermis or the tract formed by the proboscis.

The correct answer, then, is, therefore, the option " A-Anopheles and B-Culex” respectively.

Note: By preventing mosquito bites, the spread of filariasis is avoided, and typically mosquitoes with filaria worms are present in the dawn and dusk hours, using mosquito jets and repellent, and wearing long pants and sleeves are the best ways to avoid mosquito bites.