Infective larva of Ancylostoma is called

Options

A. Rhabditiform
B. Second stage juvenile
C. Embryonated larva
D. Filariform larva

Answer

To answer the question "Infective larva of Ancylostoma is called," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Genus**: The question refers to the genus Ancylostoma, which includes parasitic roundworms. The most common species is known as the old world hookworm.

2. **Life Cycle of Ancylostoma**: Ancylostoma species live in the intestines of their hosts (humans and animals like dogs and cats). They reproduce inside the host and release eggs.

3. **Egg Development**: The eggs are excreted through feces into the soil. Under favorable conditions (moist soil), these eggs hatch within 1 to 2 days.

4. **Larval Stages**: After hatching, the larvae develop into different forms. The initial larval stage is called the rhabditiform larva, which is non-infective.

5. **Infective Larval Stage**: After 5 to 10 days, the larvae develop into the infective stage known as the **pleriform larva**. This is the larval form that can penetrate human skin.

6. **Penetration and Migration**: The pleriform larva can enter the human body through the skin, typically via hair follicles, and then migrate through the lymphatic system to various organs.

7. **Conclusion**: Therefore, the infective larva of Ancylostoma is called the **pleriform larva**.

### Final Answer:
The infective larva of Ancylostoma is called the **pleriform larva**.

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