The dengue disease spread by Aedes mosquito is caused by :

Options

A. Bacteria
B. virus
C. protozoan
D. fungus

Answer

**Step-by-Step Solution:**

1. **Identify the Disease and its Vector**: The question mentions dengue disease, which is known to be spread by Aedes mosquitoes.

2. **Determine the Causative Agent**: The causative agent of dengue disease is a virus. Specifically, it is caused by the dengue virus.

3. **Understand the Transmission Mechanism**: The dengue virus typically grows in the salivary glands of Aedes mosquitoes. When these mosquitoes bite a human, they inject the virus into the bloodstream, leading to the disease.

4. **Effects of the Virus**: Once in the human body, the dengue virus primarily affects the platelets, which can lead to severe health complications.

5. **Eliminate Other Options**: The question may provide multiple-choice answers. It is important to note that bacteria, protozoa, and fungi are not responsible for causing dengue disease.

6. **Conclusion**: Therefore, the correct answer to the question is that the dengue disease spread by Aedes mosquitoes is caused by a virus.

**Final Answer**: The dengue disease spread by Aedes mosquito is caused by a virus.

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