Sporozoites of Plasmodium are formed in

Options

A. Gametocytes
B. Oocysts
C. Sporoblasts
D. Trophozoites.

Answer

To answer the question "Sporozoites of Plasmodium are formed in," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Sporozoites**:
- Sporozoites are the infective stage of the Plasmodium species, which is responsible for malaria. They are spindle-shaped structures that are crucial for the transmission of the disease.

2. **Identifying the Host**:
- The primary host for Plasmodium is the female Anopheles mosquito. This is where the sexual reproduction of the parasite occurs.

3. **Life Cycle of Plasmodium**:
- When a female Anopheles mosquito bites a human, it ingests the gametocytes (both macro and micro) present in the human's blood.

4. **Fertilization Process**:
- Inside the mosquito's stomach, the microgametocyte undergoes a process called exflagellation, leading to fertilization with the macrogametocyte, resulting in the formation of a zygote.

5. **Formation of Oocyst**:
- The zygote develops into a structure called a eukaryote, which then penetrates the stomach wall of the mosquito and transforms into an oocyst.

6. **Development of Sporozoites**:
- The oocyst undergoes multiple fission, leading to the production of numerous sporozoites. This is the critical stage where sporozoites are formed.

7. **Release and Transmission**:
- Once formed, the sporozoites are released from the oocyst, migrate to the salivary glands of the mosquito, and are ready to be transmitted to another human host when the mosquito bites again.

8. **Final Answer**:
- Therefore, the sporozoites of Plasmodium are formed in the oocyst located in the stomach wall of the female Anopheles mosquito.

### Conclusion:
The correct answer to the question is that sporozoites of Plasmodium are formed in the **oocyst** within the **stomach wall** of the female Anopheles mosquito.

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