Filariasis is due to

Options

A. Helminth
B. Protozoan
C. Bacterium
D. Virus

Answer

**Step-by-Step Solution:**

1. **Understanding Filariasis**: Filariasis is a parasitic disease that affects humans. It is important to identify the type of organism that causes this disease.

2. **Identifying the Options**: The question provides four options:
- Helminth
- Protozoan
- Bacterium
- Virus

3. **Analyzing the Cause**: Filariasis is specifically caused by parasitic worms. These worms belong to the category of helminths, which are large multicellular organisms.

4. **Specific Worms Involved**: The primary helminths responsible for filariasis include:
- Wuchereria bancrofti
- Brugia malayi
- Brugia timori

5. **Effects on the Body**: These helminths primarily invade the lymphatic system, leading to symptoms such as swelling (edema), thickening of the skin, and changes in underlying tissues. The lower extremities are most commonly affected.

6. **Conclusion**: Based on the analysis, the correct answer to the question "Filariasis is due to" is **Helminth**.

**Final Answer**: Filariasis is due to Helminth.

---