Which parasite is responsible for causing gigantim in it its intermediate host

Options

A. Plasmodium vivax
B. Ascaris lumbricoides
C. Sacculina
D. Fasciola hepatica

Answer

To solve the question "Which parasite is responsible for causing gigantism in its intermediate host?", we will analyze the options provided and identify the correct answer step by step.

### Step 1: Understand the Question
The question asks for a parasite that causes gigantism in its intermediate host. We need to identify which of the listed parasites has this effect.

### Step 2: Analyze the Options
1. **Plasmodium vivax**: This is a protozoan parasite that causes malaria. It primarily affects humans and is transmitted by mosquitoes. It does not cause gigantism in any host.

2. **Ascaris Lumbricoides**: This is a roundworm that infects the human intestine. It does not cause gigantism in any intermediate host.

3. **Sacculina**: This is a parasitic barnacle that infects crabs. It does not cause gigantism in its host; rather, it alters the reproductive system of the crab.

4. **Fasciola hepatica**: This is a liver fluke that affects sheep and other ruminants. It has a life cycle that includes a snail as an intermediate host. The larvae of Fasciola hepatica can cause the snail to grow larger, leading to gigantism.

5. **Fasciola hepatica**: This is the same as above and is indeed responsible for causing gigantism in its intermediate host, the snail.

### Step 3: Identify the Correct Answer
After analyzing each option, we find that **Fasciola hepatica** is the only parasite listed that causes gigantism in its intermediate host (the snail).

### Conclusion
The correct answer to the question is **Fasciola hepatica**.

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