Question

Which of the following diseases is not transmitted by the vector shown in the figure?
(i) Malaria

(ii) Yellow fever

(iii) Typhoid
(iv) Sleeping sickness

(v) Kala-azar

• A. (ii), (iii) and (iv)
• B. (i), (iii) and (v)
• C. (i) and (v)
• D. (iii), (iv) and (v)

Answer 1

Answer: (D)

(iii), (iv) and (v)

Typhoid fever is caused by the Salmonella typhi bacteria. It can also be caused by Salmonella paratyphi, a related bacterium that usually causes a less severe illness. The bacteria are deposited in water or food by a human carrier and are then spread to other people in the area.
Sleeping sickness is caused by two germs (protozoa), Trypanosoma brucei rhodesiense and Trypanosomoa brucei gambiense. The more severe form of the illness is caused by T. rhodesiense. Tsetse flies carry the infection. When an infected fly bites you, the infection spreads through your blood.
Leishmaniasis (kala azar) is caused by parasites from the genus Leishmania. A person gets leishmaniasis when bitten by an infected sandfly. The parasite lives and multiplies inside the female sandfly. The insect is most active in humid environments during the warmer months and at night, from dusk to dawn.

So, the correct answer is option D.