In the life cycle of Plasmodium vivax, schizogony occurs in these cells of man (a) Hepatocytes (b) Adipocytes (c) Erythrocytes (d) Reticulocytes

Options

A. b and d
B. c and d
C. a and c
D. a and b

Answer

To answer the question regarding where schizogony occurs in the life cycle of Plasmodium vivax, we can break down the process step by step:

### Step-by-Step Solution:

1. **Understanding Schizogony**: Schizogony is a type of asexual reproduction that occurs in certain protozoan parasites, including Plasmodium vivax. It involves the division of the nucleus followed by the division of the cytoplasm, resulting in multiple daughter cells.

2. **Life Cycle of Plasmodium vivax**: The life cycle of Plasmodium vivax can be divided into two main phases:
- **Sporogony**: This phase occurs in the mosquito host.
- **Schizogony**: This phase occurs in the human host.

3. **Identifying the Cells Involved**:
- **Hepatocytes**: These are liver cells where the initial stage of schizogony occurs. This is known as pre-erythrocytic schizogony, where the parasite multiplies in the liver.
- **Erythrocytes**: These are red blood cells where the second phase of schizogony occurs, known as erythrocytic schizogony. The parasite invades the erythrocytes and undergoes further multiplication.

4. **Other Cell Types**:
- **Adipocytes**: These are fat cells and are not involved in the life cycle of Plasmodium vivax.
- **Reticulocytes**: These are immature red blood cells. While they can be infected, the primary stages of schizogony are associated with mature erythrocytes.

5. **Conclusion**: The correct answers to the question are (a) Hepatocytes and (c) Erythrocytes. Schizogony occurs in both liver cells and red blood cells during the life cycle of Plasmodium vivax.

### Final Answer:
The correct options are (a) Hepatocytes and (c) Erythrocytes.

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