Filariasis is caused by

Options

A. Wuchereria bancrofti
B. Glossina palpalis
C. Phlebotomus argentips
D. All of these

Answer

**Step-by-Step Solution:**

1. **Understanding Filariasis**: Filariasis is a tropical disease caused by parasitic worms. It primarily affects the lymphatic system and can lead to severe swelling and deformities.

2. **Identifying the Causative Agent**: The disease is mainly caused by filarial worms, particularly Wuchereria bancrofti, which is the most common causative agent of lymphatic filariasis.

3. **Transmission**: The filarial worms are transmitted to humans through the bites of infected mosquitoes. The larvae enter the human body and develop into adult worms in the lymphatic system.

4. **Symptoms**: The infection can lead to symptoms such as swelling of the limbs (often referred to as elephantiasis), pain, and inflammation in the affected areas.

5. **Conclusion**: Therefore, filariasis is caused by the parasitic worm Wuchereria bancrofti, transmitted through mosquito bites.

**Final Answer**: Filariasis is caused by the parasitic worm Wuchereria bancrofti.

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