Adults of Wuchereria bancrofti attack

Options

A. Excretory system
B. nervous system
C. blood circulation
D. Lymph vessel

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question refers to Wuchereria bancrofti, which is a type of filarial worm.

2. **Understand the Disease**: Wuchereria bancrofti is known to cause a disease called Elephantiasis or Filariasis. This disease is characterized by severe swelling, particularly in the limbs and genitals.

3. **Transmission**: It is important to note that this worm is transmitted through mosquito bites, making it a vector-borne disease.

4. **Target System**: The adult Wuchereria bancrofti primarily attacks the lymphatic system in humans. This system is crucial for fluid balance and immune function.

5. **Location of Attack**: Specifically, the worm affects the lower lymphatic system, which is located in the lower limbs. This can lead to chronic inflammation.

6. **Symptoms**: The chronic inflammation caused by the infection results in swelling of the lower limbs and genitals, which is a hallmark of the disease.

7. **Evaluate Options**: The question provides multiple-choice options regarding which system is attacked:
- A. Excretory system - Incorrect
- B. Nervous system - Incorrect
- C. Blood circulation - Incorrect
- D. Lymph vessels - Correct

8. **Conclusion**: Based on the information, the correct answer is that the adults of Wuchereria bancrofti attack the lymph vessels.

**Final Answer**: D. Lymph vessels

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