AUDIE CORNISH, HOST: A patch of mold has fetched a pretty penny in London - over $14,000. Now, to be clear, this isn't the black stuff growing in damp corners of the bathroom. It's a dish of perhaps the most important mold in medical history.</s>ALEXANDER FLEMING: Penicillin's made from a mold - pennicillium - hence the name.</s>ARI SHAPIRO, HOST: That's the Scottish scientist Alexander Fleming in a recording he made late in life. He discovered penicillin in 1928. A spore of it had dropped onto a dish of Staphylococcus he had left open in his lab. The Staph sample was killed off in a halo around the mold spore. At first, Fleming had trouble convincing other scientists to help him develop penicillin.</s>ALEXANDER FLEMING: The crude penicillin I made in those days was weak and much to impure for injection into the body.</s>AUDIE CORNISH, HOST: That changed once World War II broke out. Howard Florey and Ernst Chain figured out how to concentrate penicillin into an effective antibiotic, one that saved millions of lives during the war and since. The three shared a Nobel Prize in 1945.</s>ALEXANDER FLEMING: We certainly live in wondrous times. And when penicillin first came to light, neither I nor anyone else had the slightest conception of the enormous influence that it and the later antibiotics would have on medical practice. It is an enormous gratification to have had a hand in this magnificent revolution.</s>ARI SHAPIRO, HOST: Fleming was proud of his creation. He gave away samples of the original mold to celebrities. It was one from a collection put together by his niece that sold yesterday at the auction in London.
An auction house in London has sold a dish containing a sample of the original mold that made Penicillin for over $14,000.