The discovery of the drug penicillin. This happens by mistake while. Alec Sander Flemming are experimenting with bacteria. Staphylococcus causes (Septicemia) situation or infection in the bloodstream, the bacteria was cultured on Petri dish, put the plant into the sea. And cover tightly Keep the temperature 37 degrees Celsius, but then one day his assistant had forgotten to cover petri dishes. Found that a type of green mold on a plate full of mold around it became clear bacteria and Staphylococcus. Killed as broad Later, it was found that these fungi. (Pennicillium family) itself