Question

Aedes aegypti is a vector of?

A) Both dengue and yellow fever
B) Dengue fever
C) Yellow fever
D) Japanese encephalitis

Answer 1

Hint: Yellow fever is caused by a flavivirus from the family Flaviviridae having single-stranded RNA as genetic material. Its symptoms include fever, chills, headache, backache, nausea in the early stages, and lesion in the infected organ haemorrhaging in the severe stage. Dengue is caused by the dengue virus. Both viruses require vectors to carry for transmission.

Complete step-by-step answer:

Aedes aegypti mosquito transmits yellow fever from one human to another.
Encephalitis is caused by a flavivirus from the virus family Flaviviridae and its genetic material is single-stranded RNA, its symptoms include fever, headache, skin rash, swollen lymph nodes, body aches, and in severe stages sleepiness, stiff neck, coma, paralysis, inflammation of the brain. Encephalitis is transmitted by the bite of a mosquito(culex pipiens).
Dengue fever is also known as breakbone fever. It is a mosquito-borne tropical disease caused by a mosquito bite. This name comes from its associated muscle and joint pains. Dengue fever has three stages: the febrile phase, the critical phase, and the recovery phase. Signs and symptoms include fever( more than 105), headache, muscle pain, skin rash, pain behind the eyes, nausea, vomiting, and mild bleeding. Some warning signs include severe abdominal pain, persistent vomiting, vomiting with blood, drowsiness or irritability, dyspnea, swollen lymph nodes, prostration, and diarrhoea. Dengue virus spread to people through the bite of the infected Aedes aegypti mosquito.

Therefore the correct answer is Option A.
Note: Each year estimated 100 millions cases of dengue occur worldwide. Dengue mostly occurs in tropical and subtropical areas. The ones who get infected a second time are at higher risk of developing severe disease.