Penicillin and Medicinal Fungi
In 1928, Scottish scientist ALEXANDER FLEMING returned from vacation to find his bacteria petri dishes contaminated by mold. Around the mold, no bacteria grew — they had been killed. The mold was PENICILLIUM. The substance it produced (penicillin) became the first widely-used ANTIBIOTIC, transforming medicine. Before antibiotics, simple infections often killed. Today they're routine.
How antibiotics from fungi work. Many fungi naturally produce ANTIBIOTICS to KILL bacteria competing for the same nutrients. Penicillin disrupts bacteria's ability to build cell walls — bacteria die, but human cells (which don't have those walls) are unharmed. Other fungi produce other antibiotics: cephalosporin, griseofulvin. Statins (cholesterol drugs) — also originally from fungi. Cyclosporine (used after organ transplants) — from fungi. The pharmacy borrows enormously from fungi.
How does penicillin kill BACTERIA without harming HUMANS?
Modern challenge. ANTIBIOTIC RESISTANCE: bacteria evolve resistance to antibiotics, especially when antibiotics are overused. "Superbugs" resistant to most antibiotics now kill millions yearly. Researchers are searching for new antibiotics — including from fungi we haven't yet studied. Fungi remain a vast untapped pharmacological frontier. Conservation matters: undiscovered medicines may exist in fungi we're losing to habitat destruction.
Famous Discovery
Look up the story of Fleming's discovery, then Florey and Chain's development of mass-producible penicillin in WWII. The technology saved millions of soldiers' lives. One contaminated petri dish changed the world.
Fungi have given us some of medicine's greatest gifts. The next miracle drug is probably already in nature, waiting to be discovered.
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