Japanese encephalitis is spread by

Options

A. Tsetse fly
B. House fly
C. Sandfly
D. Mosquito

Answer

**Step-by-Step Solution:**

1. **Identify the Disease**: The question asks about Japanese encephalitis (JE), which is an infection of the brain caused by the Japanese encephalitis virus.

2. **Understand the Transmission**: Japanese encephalitis is primarily transmitted through the bite of infected mosquitoes.

3. **Recognize the Specific Mosquitoes**: The main vectors responsible for spreading Japanese encephalitis are the Aedes and Culex mosquitoes.

4. **Evaluate the Options**: The options provided are:
- Say fly
- House fly
- Sand fly
- Mosquito

5. **Analyze Each Option**:
- Say fly: Known to cause sleeping sickness, not related to JE.
- House fly: Carries pathogens causing diseases like typhoid fever, not related to JE.
- Sand fly: Causes sand fly fever and leishmaniasis, not related to JE.
- Mosquito: Correct option, as it is the vector for Japanese encephalitis.

6. **Select the Correct Answer**: Based on the analysis, the correct answer is **Mosquito**.

**Final Answer**: Japanese encephalitis is spread by **Mosquito** (option number four).

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