Schizont stages of Plasmodium vivax in man are found in

Options

A. erythrocytes only
B. erythrocytes and liver cells
C. liver cells only
D. erythrocytes, liver cells and spleen.

Answer

### Step-by-Step Solution:

1. **Understanding Plasmodium vivax**: Plasmodium vivax is a parasite responsible for causing malaria in humans. It is transmitted through the bite of infected female Anopheles mosquitoes.

2. **Infection Process**: When a mosquito bites a human, it injects the Plasmodium vivax into the bloodstream. The parasite then travels to the liver.

3. **Life Cycle Stages**: Plasmodium vivax has several life cycle stages, including the merozoite stage. After entering the bloodstream, the parasite invades red blood cells (RBCs).

4. **Formation of Merozoites**: Inside the RBCs, the parasite develops into merozoites, which are released when the RBCs burst. This process also releases hemozoin, a byproduct that can cause symptoms of malaria such as fever and chills.

5. **Development into Schizonts**: The merozoites can further develop into schizonts. Schizonts are a more advanced stage of the parasite's life cycle.

6. **Location of Schizonts**: Schizonts are found in both erythrocytes (RBCs) and liver cells (hepatocytes). After the initial infection in the liver, the schizonts can enter the bloodstream again, affecting both liver cells and RBCs.

7. **Conclusion**: Therefore, the correct answer to the question is that the schizont stages of Plasmodium vivax in humans are found in both erythrocytes and liver cells.

### Final Answer:
The schizont stages of Plasmodium vivax in man are found in **erythrocytes and liver cells**.

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