The first known antibiotic, penicillin, was discovered when Alexander Fleming noticed that a dangerous bacteria was not growing around a patch of mold in a petri dish. However, the initial strain of penicillin he develop... More »

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Antibiotics were present in ancient times in the form of molds. British scientist Sir Alexander Fleming discovered penicillin, the first working agent that demonstrated potent antibacterial properties, in 1928. Selman Wa... More »

Antibiotics are produced in laboratory conditions by fermenting microorganisms in tanks that hold hundreds of thousands of gallons, according to Infoplease from Pearson Education. Scientists strain the mold out of fermen... More »

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According to About.com, bacteriologist Alexander Fleming discovered penicillin in 1928. After returning from vacation, he noticed that mold had formed in a discarded Petri dish set aside from a contaminated experiment, a... More »

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The antibiotic penicillin is produced commercially by fermentation of the penicillum mold in special submerged-fermentation tanks through which oxygen is pumped. Although the antibacterial action of penicillin was first ... More »

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Healthy Building Science describes two methods of air sampling that result in mold spore counts: sporetrap and petri dish testing. A small known volume of air is drawn into a pump across a greased slide or a petri dish. ... More »

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Penicillin was discovered when Sir Alexander Fleming noticed that Penicillium notatum could neutralize a bacterial colony of Staphylococcus aureus, according to About.com. Fleming made the discovery by mistake when he le... More »

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