All stages of Plasmodium are digested in stomach of female Anopheles except

Options

A. (a) sporozoites
B. (b) gametocytes
C. (c) erythrocytes
D. (d) merozoites

Answer

To solve the question regarding which stage of Plasmodium is not digested in the stomach of the female Anopheles mosquito, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Life Cycle of Plasmodium**:
- Plasmodium has a complex life cycle that involves both humans and mosquitoes. The stages include sporozoites, merozoites, trophozoites, gametocytes, and zygotes.

2. **Identify the Stages Present in the Female Anopheles**:
- When a female Anopheles mosquito bites an infected human, it ingests gametocytes along with blood. These gametocytes are crucial for the next stages of the life cycle.

3. **Recognize the Role of Gametocytes**:
- In the mosquito's stomach, gametocytes develop into gametes, which then fertilize to form a zygote. This zygote eventually develops into sporozoites.

4. **Analyze the Options**:
- **A. Sporozoites**: These are formed from the zygote and can be present in the gut but can be digested.
- **B. Gametocytes**: They are necessary for the formation of zygotes and sporozoites and are not digested in the stomach.
- **C. Erythrocytes**: These are red blood cells and are not a stage of Plasmodium; hence, they are irrelevant.
- **D. Merozoites**: These can also be present in the stomach but can be digested.

5. **Identify the Exception**:
- Based on the analysis, the only stage that is not digested in the stomach of the female Anopheles is the gametocytes (Option B).

### Final Answer:
The stage of Plasmodium that is not digested in the stomach of the female Anopheles is **B. Gametocytes**.

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