The French chemist and microbiologist Louis Pasteur (1822-1895) at the age of 18. Pasteur is considered the greatest microbiologist of all time and the "father" of the germ theory of diseases. He strongly believed that diseases were caused by tiny organisms and transmitted from individual to individual. His researches brought him to the development of the earliest vaccines: the first one against anthrax,a major disease of cattle and the second one against rabies. Pasteur also recognised that milk,wine and beer,under gentle heating,could be preserved from souring. This process is now known as pasteurization and widely applied in the food industry | |
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