Which of the following act as a host for the virus which causes dengue fever?

Options

A. Mosquitoes
B. Houseflies
C. Rats
D. Humans

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the host of the virus that causes dengue fever. We need to identify which organism serves as the host for this virus.

2. **Identifying the Virus**: The virus responsible for dengue fever is not Plasmodium; instead, it is the dengue virus, which is transmitted by mosquitoes.

3. **Recognizing the Vector**: The primary vector (not host) for the dengue virus is the Aedes mosquito, particularly Aedes aegypti. This mosquito is crucial in the transmission of the virus to humans.

4. **Understanding the Host Concept**: In the context of viruses, the host is the organism that the virus infects and replicates within. In the case of dengue fever, humans are the primary hosts, while mosquitoes are the vectors that carry and transmit the virus.

5. **Conclusion**: Based on the information, the correct answer to the question is that the Aedes mosquito acts as the vector for the dengue virus, while humans are the hosts for the virus.

**Final Answer**: The mosquito (specifically Aedes mosquito) acts as a vector for the virus that causes dengue fever.

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