Which one in monogenetic

Options

A. Enterobius
B. Brugia
C. Dracunculus
D. Both A and B

Answer

To determine which organism is monogenetic among the given options, we need to understand the definition of monogenetic and analyze each option accordingly.

### Step-by-Step Solution:

1. **Understanding Monogenetic**:
- Monogenetic parasites are those that complete their life cycle in a single host. This means that all developmental stages of the parasite occur within one host organism.

2. **Analyzing the Options**:
- **Option A: Enterobius (Pinworm)**:
- Enterobius, commonly known as pinworm, is a nematode that primarily infects humans. It completes its entire life cycle within a single host (human), making it a monogenetic parasite.

- **Option B: Brugia (Filarial Worm)**:
- Brugia is a nematode that causes lymphatic filariasis (elephantiasis). It requires two hosts to complete its life cycle: humans and mosquitoes. Therefore, it is not monogenetic but digenetic.

- **Option C: Draconculus**:
- Draconculus, also a nematode, requires two hosts for its life cycle: humans and Cyclops (a type of crustacean). Thus, it is also digenetic.

- **Option D: Both A and B**:
- Since Brugia is not monogenetic, this option cannot be correct.

3. **Conclusion**:
- Based on the analysis, the only organism that is monogenetic is **Enterobius** (Pinworm).

### Final Answer:
**Enterobius** is the monogenetic parasite among the given options.

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