The vector host and reservoir host of Plasmodium vivax, respectively, are

Options

A. Man & female Anopheles mosquito
B. Female Anopheles mosquito & monkey
C. Man & monkey
D. Female Culex mosquito & monkey

Answer

To answer the question regarding the vector host and reservoir host of Plasmodium vivax, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Terms**:
- **Vector Host**: This is an organism that carries and transmits the pathogen (in this case, Plasmodium vivax) to another organism.
- **Reservoir Host**: This is an organism that harbors the pathogen and can serve as a source of infection for other hosts.

2. **Identifying the Vector for Plasmodium vivax**:
- Plasmodium vivax is a type of malaria parasite. The primary vector responsible for transmitting this parasite to humans is the **female Anopheles mosquito**. This mosquito bites humans and transfers the parasite through its saliva.

3. **Identifying the Reservoir Host for Plasmodium vivax**:
- The reservoir host for Plasmodium vivax is typically a non-human primate, such as a **monkey**. Monkeys can harbor the parasite and serve as a source of infection, especially in areas where humans and monkeys coexist.

4. **Choosing the Correct Option**:
- Based on the information gathered, the correct pairing of vector host and reservoir host for Plasmodium vivax is:
- **Vector Host**: Female Anopheles mosquito
- **Reservoir Host**: Monkey

5. **Final Answer**:
- Therefore, the correct answer to the question is the second option: **Female Anopheles mosquito and monkey**.