The intermediate host of Schistosoma is

Options

A. Snail
B. Mosquito
C. Housefly
D. Sheep

Explanation

To determine the intermediate host of Schistosoma, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Schistosoma**: Schistosoma is a genus of parasitic worms known as blood flukes. They are responsible for the disease schistosomiasis in humans.

2. **Identifying the Life Cycle**: Schistosoma has a complex life cycle that involves both definitive and intermediate hosts. The definitive host is typically a human, where the adult worms reside and reproduce.

3. **Recognizing the Intermediate Host**: The intermediate host is crucial for the development of the larvae. In the case of Schistosoma, the larvae (miracidia) need to find an intermediate host to continue their life cycle.

4. **Finding the Correct Host**: The eggs of Schistosoma are excreted in human feces or urine. Under suitable environmental conditions, these eggs hatch and release miracidia. The miracidia must then penetrate a specific type of host to develop further.

5. **Identifying the Correct Organism**: The miracidia specifically infect freshwater snails, which serve as the intermediate host for Schistosoma. The snails provide a suitable environment for the larvae to grow and develop into cercariae, which can then infect humans.

6. **Conclusion**: Based on the information gathered, the correct answer to the question is that the intermediate host of Schistosoma is **snail**.

### Final Answer:
The intermediate host of Schistosoma is **option A: snail**.

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