Which disease is not transmitted by mosquitoes?

Options

A. Malaria
B. Dengue
C. Brain fever
D. Pneumonia

Answer

To determine which disease is not transmitted by mosquitoes, we can analyze the diseases mentioned in the question and identify their vectors.

**Step 1: Identify the diseases mentioned.**
The diseases listed are malaria, dengue, brain fever, and pneumonia.

**Step 2: Analyze the transmission of each disease.**
- **Malaria:** This disease is transmitted by Anopheles mosquitoes. The causative agent is the Plasmodium species.
- **Dengue:** This disease is transmitted by Aedes mosquitoes. The causative agent is the dengue virus.
- **Brain fever (Japanese Encephalitis):** This disease is transmitted by Culex mosquitoes. The causative agent is the Japanese encephalitis virus (J.E.V.).
- **Pneumonia:** This disease is not transmitted by mosquitoes. It is typically caused by bacteria (like Streptococcus pneumoniae) or viruses and spreads through respiratory droplets.

**Step 3: Conclusion**
Among the diseases listed, pneumonia is the only one that is not transmitted by mosquitoes.

**Final Answer:** Pneumonia is not transmitted by mosquitoes.

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