Question

Which of the following diseases is not transmitted by the vector shown in the figure?

A)Malaria
B)yellow fever
C)Typhoid
D)Sleeping sickness
E)Kala-azar

Answer 1

Hint: The diverse infectious pathogens and parasites can be transmitted through mosquitoes hence they are the vectors of various diseases such as dengue, Zika, Chikungunya, West Nile fever, or malaria. To cause disease in the human’s mosquito bites infected humans first and infecting itself with the pathogens.

Complete answer:
Malaria - female anopheles mosquito is the vector of this disease. They bite the human and take the blood meals for their egg productions. Therefore, the blood meals are the link between the human and the mosquito host in the parasite life cycle.
Yellow fever - this is transmitted through the bite of infected Aedes mosquitoes. by feeding on infected primates that are human or non-human mosquitoes acquired the virus that causes yellow fever and then transmits the same virus to other healthy primates. Thus causing infection.
Sleeping sickness - it is also called human Africa trypanosomiasis and can be fatal if not treated. It is spread by the infected tsetse fly(native to the African continent). when the flies bite humans, a red sore erupts and within a few weeks personal experience fever, swollen lymph nodes, pain in muscles and joints, headache, and irritation. The disease also attaches to the central nervous system in the advanced stage which affects personality, the circadian rhythm of the human i.e biological clock, confusion, difficulty in walking, and talking. If a person will not be given the treatment it can prove to be fatal. About 60 million people are affected by sleeping sickness mainly in rural parts of East, West, and Central Africa.
Typhoid - is a bacterial infection that causes high fever, diarrhea, and vomiting. It is caused by salmonella typhi bacteria. This infection spreads through contaminated food and drinking water and is more prevalent in those places where handwashing is less frequent. It can be fatal if the person is not given treatment on time.
Kala-azar - it is a most serious form of the disease caused by three main forms of leishmaniasis i.e visceral, cutaneous and mucocutaneous.
-this disease is caused by Leishmania parasites transmitted by the bite of infected female phlebotomine sandflies
So, the correct answer is,” Typhoid, Sleeping sickness and Kala-azar”.

Note: -The most important arthropod vectors of disease are the mosquitoes.
-They are the biological factors that carry pathogens. The pathogens multiply within their bodies and deliver to the new host when they bite.