Question

Filaria, malaria, dengue fever, and yellow fever are transmitted by:
(A) Mosquitoes
(B) Houseflies
(C) Insects
(D) Bacteria

Answer 1

The above-mentioned diseases are spread in the body via the blood, which means blood gets infected first.

Complete answer:
Mosquitoes are the deadliest insect in the world. They have the ability to spread the disease to humans which causes the deaths of millions of individuals per year. There are different types of mosquitoes causing different diseases. Zika, Dengue, Chikungunya, and yellow fever are the diseases transmitted by the Aedes aegypti mosquito. Malaria is a disease which is caused by the Plasmodium parasite. Mosquitoes contain the parasite and then bite the person and inject that parasite into the bloodstream of an individual causing the disease. It is a dangerous disease that can be preventable and curable. Malaria is an acute febrile illness.
The most common vector of Filaria is caused by Anopheles in Africa and Culex quinquefasciatus in America. Aedes and Mansonia can transmit the infection in Asia and in the pacific region. Lymphatic filaria is caused by infection with parasites classified as nematodes of the family Filarioidea. Since there is no cure for this disease, so prevention is better.
Yellow fever is a viral infection caused by a particular type of mosquitoes. In mild cases, it causes fever, headache, nausea, and vomiting. But yellow fever can become dangerous, more serious causing heart, liver, and kidney problems along with bleeding.
Hence, the correct answer is option (A). Mosquitoes.

Note: Some diseases mentioned above are curable while some are not but the best thing which can be done to stay protected from these diseases is prevention.