Question

Filaria is transmitted through$/$secondary host of Wuchereria is?

• A. Anopheles
• B. Culex
• C. Tse-tse-fly
• D. Sandfly

Answer 1

Answer: (A), (B)

Culex
Anopheles

W. bancrofti carries out its lifecycle in two hosts. Humans serve as the definitive host and mosquitos as the intermediate host. The adult parasites reside in the lymphatics of the human host. The first-stage larvae, known as microfilariae, are present in the circulation. The microfilariae are found mainly in the peripheral blood. The microfilariae are transferred into a vector, which is most common mosquito species of the genera Culex, Anopheles, Mansonia, and Aedes. Inside the mosquito, the microfilariae mature into motile larvae called juveniles; these migrate to the labium after a period around 10 days. When the infected mosquito has its next blood meal, W. bancrofti larvae are deposited from the mouthparts onto the skin of the prospective host and migrate through micro cuts in the dermis or the tract created by the proboscis into the bloodstream of the new human host.

So, the correct answer is ''A and B".