penicillin
Alexander Fleming was the first one to discover penicillin. In 1875 John Tyndall was conduct one experiment.Tyndall prepared 100 tubes of broth, placed them comparatively close to each other. He kept the tubes open in order to be exposed to the air for 24 hours. Alexander Fleming accidentally rediscovered penicillin.Fleming noticed a halo of inhibition of bacterial growth around a contaminant blue-green mold staphylococcus plate culture. Fleming concluded that the mold was releasing a substance that was inhibiting bacterial growth and lysing the bacteria. this substance was nothing but the penicillin antibiotic.
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