Infective stage of Plasmodium vivax which is introduced in the human body is

Options

A. Trophozoite
B. Sporozoite
C. Cryptozoite
D. Metacryptozoite

Answer

To answer the question about the infective stage of Plasmodium vivax introduced into the human body, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Plasmodium vivax**: Plasmodium vivax is a protozoan parasite that causes malaria in humans. It has different life stages, and it's important to identify which stage is infective.

2. **Identifying the Stages**: The life cycle of Plasmodium includes several stages:
- Trophozoite: This is the feeding stage of the parasite that occurs in the human host.
- Sporozoite: This is the infective stage that is introduced into the human body.
- Cryptozoite: This is a stage that occurs within the liver.
- Metacryptozoite: This is another stage that occurs in the liver before the parasite enters the bloodstream.

3. **Determining the Infective Stage**: The question specifically asks for the stage that is introduced into the human body. The sporozoite is the stage that is transmitted from the mosquito to the human during a mosquito bite.

4. **Conclusion**: Therefore, the infective stage of Plasmodium vivax that is introduced into the human body is the **sporozoite**.

### Final Answer:
The infective stage of Plasmodium vivax introduced into the human body is **sporozoite**.

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