Filariform larva of Ancylostoma is

Options

A. First stage juvenile
B. Second stage juvenile
C. Third stage juvenile
D. Fourth stage juvenile

Answer

To answer the question about the filariform larva of Ancylostoma, we can break down the information step by step:

### Step-by-Step Solution:

1. **Understanding the Life Cycle of Ancylostoma**:
- Ancylostoma, commonly known as hookworms, has a life cycle that begins with eggs being passed in the stool of an infected host.

2. **Egg Hatching**:
- Under favorable conditions (moisture, shade, warmth), the eggs hatch into larvae within 1 to 2 days.

3. **First Stage Juvenile**:
- The first larvae that hatch are known as rhabditiform larvae, which are not yet infective. This stage is referred to as the first stage juvenile.

4. **Development into Filariform Larvae**:
- After about 5 to 10 days of development, the larvae undergo two molts and transform into filariform larvae.

5. **Identifying the Infective Stage**:
- The filariform larvae are the infective stage of Ancylostoma and are classified as the third stage juvenile (L3). They can survive in the environment for several weeks.

6. **Infection Process**:
- These infective filariform larvae can penetrate human skin (often through bare feet) and travel through the bloodstream to the heart and lungs.

7. **Conclusion**:
- Therefore, the correct answer to the question "Filariform larva of Ancylostoma is" is that it is the **third stage juvenile**.

### Final Answer:
The filariform larva of Ancylostoma is the **third stage juvenile** (Option C).

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