Filarial worms usually infect the lymphatic vessels of lower limbs and the disease is called …………………………….. .

Explanation

**Step-by-Step Solution:**

1. **Identify the Organism**: The question refers to filarial worms, which are known to infect the lymphatic system.

2. **Recognize the Affected Area**: The lymphatic vessels of the lower limbs are specifically mentioned as the site of infection.

3. **Name the Disease**: The disease caused by the infection of filarial worms in the lymphatic vessels is known as **Lymphatic Filariasis** or commonly referred to as **Elephantiasis**.

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