When a spiral bacterium has only one curve and is comma like, it is called

Options

A. spirillum
B. vibrio
C. baciliius
D. spirochaete

Answer

**Step-by-Step Solution:**

1. **Understanding Bacterial Shapes**: Bacteria can be classified based on their shapes. The main types include spherical (cocci), rod-shaped (bacilli), spiral (spirilla), comma-shaped (vibrios), and corkscrew-shaped (spirochetes).

2. **Identifying the Shape in the Question**: The question specifically mentions a "spiral bacterium" that has "only one curve" and is "comma-like." This description suggests that we are looking for a specific type of spiral bacterium that is not fully spiraled but has a single curve.

3. **Recognizing the Comma Shape**: The term "comma-like" is crucial here. A bacterium that is described as comma-shaped typically refers to the vibrios. This shape is characterized by a single curve, resembling a comma.

4. **Eliminating Other Options**:
- **Spirulim**: This term does not refer to a recognized bacterial shape.
- **Bacillus**: This refers to rod-shaped bacteria, which does not fit the description.
- **Spirochetes**: These are corkscrew-shaped bacteria, which also do not match the description of having a single curve.

5. **Conclusion**: Based on the characteristics described in the question, the correct answer is "Vibrio," which is the term used for comma-shaped bacteria.

**Final Answer**: The bacterium that has only one curve and is comma-like is called **Vibrio**.

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