Which of the following disease is caused by a virus transmitted through a bite of infected mosquito ?

Options

A. Plague
B. Filariasis
C. Dengue
D. Ascariasis

Answer

To solve the question "Which of the following diseases is caused by a virus transmitted through a bite of an infected mosquito?", we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- Plague
- Filariasis
- Dengue
- Ascariasis

2. **Analyze Each Option**:
- **Plague**: This disease is caused by the bacterium *Yersinia pestis*. It is not transmitted by mosquitoes but rather by fleas from infected animals. Therefore, this option is incorrect.

- **Filariasis**: This disease is caused by parasitic worms (specifically filarial worms). It is transmitted by mosquito bites, but it is not caused by a virus. Hence, this option is also incorrect.

- **Dengue**: This disease is caused by the dengue virus, which is transmitted through the bite of infected mosquitoes, specifically the *Aedes aegypti* mosquito. This option is correct as it meets both criteria of being viral and transmitted by mosquito bites.

- **Ascariasis**: This disease is caused by the roundworm *Ascaris lumbricoides*. It is transmitted through ingestion of contaminated soil or food, not through mosquito bites. Therefore, this option is incorrect.

3. **Conclusion**: Based on the analysis, the disease that is caused by a virus transmitted through a bite of an infected mosquito is **Dengue**.

### Final Answer:
**Dengue**

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