Question

Dengue fever is spread by
A) Anopheles
B) Aedes
C) Culex
D) Musca

Answer 1

Hint:Dengue fever is caused by the dengue virus and it is a mosquito-borne disease. It is also called break bone fever. It is a tropical disease with an incubation period of about 12-14 days.

Complete answer:
Vector borne diseases are the diseases that spread by mosquitoes, for example, malaria, dengue, filariasis, etc.
>Anopheles:-Malaria which is one of the most common diseases of mankind spreads by the bite of female Anopheles mosquitoes. It is caused by the protozoan Plasmodium that requires two hosts two complete its life cycle- man and Anopheles mosquitoes.
>Aedes:-Dengue spreads by the bite of female mosquitoes of Aedes genus. These mosquitoes can spread infection at any time of day but they usually bite in the evening and early morning.
The dengue virus can also be transmitted from an infected individual to a healthy person through infected blood products or organ donation.
>Culex:-Filariasis which is caused by the Wuchereria bancrofti and W. malayi usually spreads by the bite of Culex mosquitoes. When they bite, the microfilariae of these pathogens are injected into the blood of man along with the saliva of these mosquitoes.
>Musca:-Musca domestica or the housefly is also a carrier of several diseases like cholera, ascariasis, etc. They breed on the waste, and unhygienic places and contaminate the food and water.

Hence the correct option is B. Aedes.

Note:The symptoms of the dengue fever are: fever, headache, muscle pain, joint pain and skin rash. It may also cause bleeding, low levels of blood platelets and blood plasma leakage. In severe cases, it may also lead to dengue shock syndrome which is characterized by dangerously low blood pressure.