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Louis Pasteur. Engraving of Louis Pasteur (1822- 1895), French chemist and bacteriologist. Pasteur founded the science of microbiology and discovered that diseases were caused by tiny organisms transmitted from person to person. He developed vaccines against anthrax, a major disease of cattle, and rabies. Pasteur also discovered that foodstuffs, under gentle heating, could be preserved from souring. This pasteurization process is now widely used in the food industry. Image of Pasteur in middle age; the dilated temporal artery which resulted from his stroke of 1886 is visible. Pasteur had several strokes from the age of 45 and he eventually died of one.
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