Question

Choose the correct alternative.

The bite of an infected ________ causes sleeping sickness.

• A. Anopheles mosquito
• B. fly
• C. tsetse fly
• D. Culex

Answer 1

The correct option is C

tsetse fly

The correct option is C.

Explanation of the correct option:

1. Vector is an organism that carries and transmits pathogens to a living organism.
2. Vectors are generally arthropods like mosquitoes, flies, bugs, sandflies, etc.
3. The causative agent for sleeping sickness is a protozoan Trypanosoma brucei.
4. The protozoan is carried by the vector tsetse fly.

Explanation of the incorrect options:

Option A: Female Anopheles mosquito is the vector for the malarial parasite.

Option B: Fly acts as a vector for many diseases.

Option D: Culex mosquito is a vector for filaria.

Final answer

The bite of an infected tsetse fly causes sleeping sickness.