For releasing larvae, female Guinea Worm

Options

A. Descends to urinary bladder
B. Descends to anal chamber
C. Forms blisters in repiratory tract
D. Produces skin blisters

Answer

### Step-by-Step Text Solution:

1. **Understanding the Guinea Worm Lifecycle**: The Guinea worm (Dracunculus medinensis) is a parasitic nematode that infects humans through contaminated water sources.

2. **Infection Process**: People become infected with Guinea worm larvae by drinking water that contains tiny water fleas (copepods) that carry the larvae.

3. **Larvae Release**: Once ingested, the larvae are released from the copepods in the stomach and penetrate the digestive tract of the host.

4. **Development**: The larvae then migrate into the body cavity, where they grow into adult worms over a period of 10 to 14 months. Adult female Guinea worms can grow to lengths of 60 to 100 centimeters (2 to 3 feet).

5. **Blister Formation**: When the female worm is ready to release its larvae, it creates a blister on the skin, typically on the legs or feet. This blister is painful and causes a burning sensation.

6. **Blister Bursting**: The blister usually bursts within 24 to 72 hours, allowing the larvae to be released into the water, where they can infect new hosts.

7. **Conclusion**: Therefore, the female Guinea worm releases larvae by producing skin blisters that burst, allowing the larvae to exit the host's body.