Which antibiotic is not produced by streptomyces

Options

A. Bacitracin
B. Chloromycetin
C. Nystatin
D. Aureomycin

Answer

To determine which antibiotic is not produced by Streptomyces, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Streptomyces**:
- Streptomyces is a genus of bacteria known for its ability to produce a wide variety of antibiotics. They are particularly noted for their role in producing many clinically important antibiotics.

2. **Identify the Antibiotics**:
- The options given are:
- Bacitracin
- Fluromycin
- Nystatin
- Aureomycin

3. **Research Each Antibiotic**:
- **Bacitracin**: This antibiotic is produced by Bacillus subtilis, not by Streptomyces.
- **Fluromycin**: This antibiotic is derived from Streptomyces species.
- **Nystatin**: This antibiotic is produced by Streptomyces noursei.
- **Aureomycin**: This antibiotic is produced by Streptomyces aureofaciens.

4. **Conclusion**:
- Based on the information gathered, Bacitracin is the antibiotic that is not produced by Streptomyces.

### Final Answer:
The antibiotic that is not produced by Streptomyces is **Bacitracin**.

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