Which of these bacteria are comma-shaped?

Options

A. Cocci
B. Bacilli
C. Spirilli
D. Vibrios

Answer

To determine which of the given bacteria are comma-shaped, we can analyze the options provided:

1. **Coccus**: This type of bacteria is round in shape. Therefore, it is not comma-shaped.

2. **Bacillus**: Bacillus bacteria are rod-shaped. Hence, they do not fit the description of being comma-shaped.

3. **Spirilla**: This type of bacteria has a spiral shape. So, it is also not comma-shaped.

4. **Vibrio**: Vibrio bacteria are indeed comma-shaped. They resemble a curved rod, which is characteristic of their shape.

Based on the analysis above, the correct answer is **Vibrio** as the comma-shaped bacteria.

### Step-by-Step Solution:
1. **Identify the types of bacteria given**: Coccus, Bacillus, Spirilla, Vibrio.
2. **Analyze the shape of each type**:
- Coccus: Round shape (not comma-shaped).
- Bacillus: Rod shape (not comma-shaped).
- Spirilla: Spiral shape (not comma-shaped).
- Vibrio: Comma shape (correct answer).
3. **Conclude the answer**: The comma-shaped bacteria among the options is Vibrio.