Question

In the life cycle of Ascaris, the infective stage is

• A. First stage larva
• B. Second stage larva
• C. Third stage larva
• D. Fertilized eggs

Hint:

Ascaris infective stage is the second-stage larva after hatching from eggs.

Answer 1

The Correct Option is B

The infective stage of Ascaris is the second-stage larva. After hatching from the fertilized eggs, the larvae undergo development, and the second-stage larva is the one capable of infecting the host.
- First-stage larvae are not infective.
- Third-stage larvae appear in some nematodes but not Ascaris.
- Fertilized eggs are the transmission stage but require development into larvae to become infective.