![A petri dish that holds a sample of mould that enabled Alexander Fleming to discover the antibiotic power of penicillin which is one of the items that features in 'Directory of Collections', A petri dish that holds a sample of mould that enabled Alexander Fleming to discover the antibiotic power of penicillin which is one of the items that features in 'Directory of Collections',](https://c8.alamy.com/comp/HAH6GY/a-petri-dish-that-holds-a-sample-of-mould-that-enabled-alexander-fleming-HAH6GY.jpg)
A petri dish that holds a sample of mould that enabled Alexander Fleming to discover the antibiotic power of penicillin which is one of the items that features in 'Directory of Collections',
![Alexander Fleming, The Discoverer of the Antibiotic Effects of Penicillin · Frontiers for Young Minds Alexander Fleming, The Discoverer of the Antibiotic Effects of Penicillin · Frontiers for Young Minds](https://www.frontiersin.org/files/Articles/494821/frym-07-00159-HTML-r1/image_m/figure-1.jpg)
Alexander Fleming, The Discoverer of the Antibiotic Effects of Penicillin · Frontiers for Young Minds
![Hektoen International on Twitter: "In 1928 Alexander Fleming carried out experiments that led to the discovery of penicillin, observing that a Petri dish inoculated with Staphylococci had been contaminated with a mold. Hektoen International on Twitter: "In 1928 Alexander Fleming carried out experiments that led to the discovery of penicillin, observing that a Petri dish inoculated with Staphylococci had been contaminated with a mold.](https://pbs.twimg.com/media/D4M1TTJWsAAJ3o_.jpg)