The Discovery of Penicillin—New Insights After More Than 75 Years of Clinical Use
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After just over 75 years of penicillin’s clinical use, the world can see that its impact was immediate and profound. In 1928, a chance event in Alexander Fleming’s London laboratory changed the course of medicine. However, the purification and first clinical use of penicillin would take more than a decade. Unprecedented United States/Great Britain cooperation to produce penicillin was incredibly successful by 1943. This success overshadowed efforts to produce penicillin during World War II in Europe, particularly in the Netherlands. Information about these efforts, available only in the last 10–15 years, provides new insights into the story of the first antibiotic. Researchers in the Netherlands produced penicillin using their own production methods and marketed it in 1946, which eventually increased the penicillin supply and decreased the price. The unusual serendipity involved in the discovery of penicillin demonstrates the difficulties in finding new antibiotics and should remind health professionals to expertly manage these extraordinary medicines.
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Alexander Fleming discovered penicillin in 1928 when he observed that a Penicillium mold inhibited bacterial growth.
“Penicillin, the first widely effective antibiotic, was discovered by Alexander Fleming in 1928 when he observed that a Penicillium mold inhibited bacterial growth [1, 2].”
From The penicillin revolution and the role of the forgotten pioneer Vincenzo Tiberio (1869-1915): discovery, development and legacy. (2025) · cites this paper as [1]
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Further Observations on Penicillin
Abraham, E. P., Chain, E., Fletcher, C. M., Gardner, A. D., Heatley, N. G., Jennings, M. A., & Florey, H. W. (1941) · The Lancet · doi:10.1016/s0140-6736(00)72122-2 · Cited by 821 · see citing works
Penicillin as a Chemotherapeutic Agent
Chain, E., Florey, H. W., Gardner, A. D., Heatley, N. G., Jennings, M. A., Orr-Ewing, J., & Sanders, A. G. (1940) · The Lancet · doi:10.1016/s0140-6736(01)08728-1 · Cited by 603 · see citing works
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Research works printed but not linked: 8
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- [2]Gaynes R. Paul Ehrlich and the magic bullet. In: Germ theory: medical pioneers in infectious diseases. Washington (DC): American Society for Microbiology Press; 2011. p. 250.
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Varotto, E., Galassi, F. M., Martini, M., Gallitto, L., & Ingaliso, L. (2025) · Journal of Preventive Medicine and Hygiene · doi:10.15167/2421-4248/jpmh2025.66.2.3647
- Authors
- Gaynes, R.
- Affiliations
- Emory University (US)
- Corresponding author
- Gaynes, Robert
- Venue
- Emerging Infectious Diseases
- Published
- 2017-05
- Volume
- 23
- Issue
- 5
- Pages
- 849-853
- ISSN
- 1080-6040 (ISSN-L)
- 1080-6059
- PMC
- PMC5403050
- OpenAlex
- W2603725361
- Cited by
- 597
- References
- 2
- Citations by year
- 2026: 74 · 2025: 98 · 2024: 102 · 2023: 67 · 2022: 69 · 2021: 79 · 2020: 62 · 2019: 32 · 2018: 8 · 2017: 1
- FWCI
- 20.95
- Type
- journal article
- Language
- en
- Open access
- diamond
- doi.org
- Licence
- cc-by
- Locations
- Emerging infectious diseases (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Centers for Disease Control and Prevention
- School of Medicine, Emory University
- Topics
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Historical Medical Research and Treatments
- Social Sciences › Arts and Humanities › History › Medical History and Innovations
- Social Sciences › Arts and Humanities › History and Philosophy of Science › History of Science and Medicine
- Keywords
- penicillin, history of antibiotics, Alexander Fleming, penicillin discovery, penicillin production, World War II, antibiotic development, antibiotic management
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