Which one among the following is the causal agent of helminthic disease ?

Options

A. Schistosoma haemotobium
B. Trichophyton
C. Trichomonas vaginalis
D. Tinea barbae

Answer

To determine the causal agent of helminthic disease from the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Helminthic Diseases**: Helminthic diseases are caused by parasitic worms, which are classified into two main groups: Platyhelminthes (flatworms) and Nematodes (roundworms).

2. **Examine the Options**:
- **Option 1: Cystosoma hematobium**: This is known as the urinary blood fluke and is a type of flatworm (Platyhelminthes). It is indeed a causal agent of a helminthic disease called schistosomiasis.
- **Option 2: Trichophyton**: This is a genus of fungi that causes ringworm infections. It is not a helminthic agent.
- **Option 3: Trichomonas vaginalis**: This is an anaerobic protozoan that causes trichomoniasis. It is not a helminthic agent.
- **Option 4: Tinea barbae**: This is a fungal infection affecting the beard area. It is also not a helminthic agent.

3. **Identify the Correct Answer**: Among the options given, Cystosoma hematobium is the only organism that is a helminth and is responsible for causing a helminthic disease.

### Conclusion:
The correct answer is **Cystosoma hematobium**, as it is the only option that represents a causal agent of a helminthic disease.

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