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October 5, 1928

On this day, Alexander Fleming observed the antibacterial properties of penicillin, which was derived from the Penicillium notatum mold. This serendipitous discovery marked the birth of modern antibiotics and transformed the treatment of bacterial infections.

Penicillin is a type of beta-lactam antibiotic that works by inhibiting the cell wall synthesis of bacteria, making it effective against a variety of gram-positive bacteria. It is widely used to treat infections caused by staphylococci and streptococci. The discovery of penicillin not only opened the floodgates for the development of more antibiotics but also highlighted the significance of fungi in medicine, showcasing how naturally occurring substances can revolutionize healthcare.

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