Who discovered penicillin, inaugurating the antibiotic era, and in what year?

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Multiple Choice

Who discovered penicillin, inaugurating the antibiotic era, and in what year?

Alexander Fleming discovered penicillin in 1928 when a mold contamination on a Staphylococcus culture inhibited the surrounding bacterial growth, revealing penicillin as the active antibacterial substance. This marked the start of the antibiotic era because it was the first true antibiotic identified, transforming medicine by providing a powerful tool to treat bacterial infections that were often fatal. While its practical, mass-produced use came later in the 1940s thanks to the work of Howard Florey and Ernst Boris Chain, the essential discovery occurred in 1928. The other figures and years point to earlier or unrelated breakthroughs (for example, Jenner’s smallpox vaccine and Pasteur’s broader microbiology contributions), which do not reflect the discovery of penicillin.

Alexander Fleming discovered penicillin in 1928 when a mold contamination on a Staphylococcus culture inhibited the surrounding bacterial growth, revealing penicillin as the active antibacterial substance. This marked the start of the antibiotic era because it was the first true antibiotic identified, transforming medicine by providing a powerful tool to treat bacterial infections that were often fatal. While its practical, mass-produced use came later in the 1940s thanks to the work of Howard Florey and Ernst Boris Chain, the essential discovery occurred in 1928. The other figures and years point to earlier or unrelated breakthroughs (for example, Jenner’s smallpox vaccine and Pasteur’s broader microbiology contributions), which do not reflect the discovery of penicillin.

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