Commercial extraction of penicillin was done by

Options

A. Alexander Fleming
B. Ernest Chain
C. Howard Florey
D. More than one option is correct

Answer

**Step-by-Step Solution:**

1. **Understanding the Discovery of Penicillin**:
- Penicillin was discovered by Alexander Fleming in 1928. He observed that a mold (Penicillium notatum) inhibited the growth of Staphylococcus bacteria on a culture plate.

2. **Identifying the Role of Florey and Chain**:
- Although Fleming discovered penicillin, it was Howard Florey and Ernst Boris Chain who developed the methods for its commercial extraction and production. They conducted experiments to purify penicillin and demonstrated its effectiveness in treating bacterial infections.

3. **Commercial Use During World War II**:
- Florey and Chain's work led to the mass production of penicillin, which was crucial for treating wounded soldiers during World War II, significantly reducing the death rate from bacterial infections.

4. **Conclusion**:
- Therefore, the commercial extraction of penicillin was primarily done by Florey and Chain, building upon Fleming's initial discovery.

**Final Answer**: The commercial extraction of penicillin was done by Florey and Chain.

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