Infective stage of Plasmodium for human is

Options

A. Merozoite
B. Sporozoite
C. Microgamelocyte
D. Sporocyst

Answer

To determine the infective stage of Plasmodium for humans, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Plasmodium Life Cycle**:
- Plasmodium is a genus of parasitic protozoa, which causes malaria in humans. It has a complex life cycle that includes both asexual and sexual reproduction stages.

2. **Identifying the Infective Stage**:
- The infective stage of Plasmodium for humans is the sporozoite stage. This stage is crucial for initiating the infection in the human host.

3. **Transmission of Sporozoites**:
- Sporozoites are transmitted to humans through the bite of an infected female Anopheles mosquito. When the mosquito bites, it injects the sporozoites into the bloodstream of the human host.

4. **Development in the Human Body**:
- Once in the human body, sporozoites travel to the liver, where they undergo asexual reproduction. This leads to the formation of merozoites, which eventually enter red blood cells (RBCs) and continue the life cycle.

5. **Consequences of Infection**:
- The multiplication of merozoites in RBCs leads to the symptoms of malaria, such as fever, chills, and anemia. However, it is the initial sporozoite stage that is responsible for the infection.

6. **Conclusion**:
- Therefore, the infective stage of Plasmodium for humans is the sporozoite stage.

### Final Answer:
The infective stage of Plasmodium for humans is the **Sporozoite stage**.

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