Human infection of blood Fluke occurs through

Options

A. Metacercarria
B. Miracidium
C. capsule
D. Cercariae

Answer

**Step-by-Step Solution:**

1. **Understanding Blood Fluke Infection:**
- Blood flukes, scientifically known as Schistosoma, are parasitic flatworms that infect humans. They are responsible for schistosomiasis, a disease that can cause significant health issues.

2. **Transmission of Blood Flukes:**
- The infection occurs when humans come into contact with water that contains the larvae of the blood fluke. These larvae are known as cercariae.

3. **Identifying the Options:**
- The question provides four options for how human infection occurs:
- A. Metacercaria
- B. Miracidium
- C. Capsule
- D. Cercaria

4. **Analyzing Each Option:**
- **Metacercaria:** This is a stage in the life cycle of some trematodes but is not associated with blood flukes. Therefore, this option is incorrect.
- **Miracidium:** This is the larval stage that hatches from eggs in water and infects the first intermediate host (usually a snail). It does not directly infect humans. Hence, this option is also incorrect.
- **Capsule:** This term does not relate to the life cycle or transmission of blood flukes. Therefore, this option is incorrect.
- **Cercaria:** This is the correct answer. Cercariae are the free-swimming larval stage that emerges from the snail and can penetrate human skin, leading to infection.

5. **Conclusion:**
- The human infection of blood fluke occurs through **Cercaria** (Option D).

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