From which microorganism is streptomycin prepared

Options

A. Streptomyces griseus
B. Streptomyces rimosus
C. Streptomyces antibioticus
D. Streptomyces nodosus

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the microorganism from which streptomycin is prepared. Streptomycin is an antibiotic used to treat various bacterial infections.

2. **Identifying the Options**: The options provided are:
- A) Streptomyces griseus
- B) Streptomyces rimosus
- C) Streptomyces antibioticus
- D) Streptomyces nodosus

3. **Researching Streptomycin**: Streptomycin is known to be effective against several bacterial infections, including tuberculosis, plague, and rat bite fever.

4. **Identifying the Source of Streptomycin**: Streptomycin is derived from a specific strain of bacteria. Research indicates that it is produced by the bacterium *Streptomyces griseus*.

5. **Analyzing the Other Options**:
- **Streptomyces rimosus**: This strain is known for producing tetracycline, not streptomycin.
- **Streptomyces antibioticus**: This strain produces actinomycin, not streptomycin.
- **Streptomyces nodosus**: This strain produces amphotericin B, not streptomycin.

6. **Conclusion**: Based on the information gathered, the correct answer to the question is **A) Streptomyces griseus**, as it is the microorganism from which streptomycin is prepared.

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