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:

1. **Plague**:
- The plague is caused by the bacterium *Yersinia pestis*, which is transmitted through fleas, not mosquitoes. Therefore, this option is incorrect.

2. **Filariasis**:
- Filariasis is caused by parasitic worms, specifically *Wuchereria bancrofti*. It is transmitted by mosquito bites, but it is not caused by a virus. Thus, this option is also incorrect.

3. **Dengue**:
- Dengue fever is caused by the dengue virus, which is indeed transmitted through the bite of infected mosquitoes, particularly the *Aedes aegypti* mosquito. This is a viral infection and fits the criteria given in the question. Therefore, this option is correct.

4. **Ascariasis**:
- Ascariasis is caused by the roundworm *Ascaris lumbricoides*. This disease is not transmitted by mosquitoes but rather through ingestion of contaminated food or water. Hence, this option is incorrect.

Based on the analysis, the correct answer is **3. Dengue**.