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  • Animalcules!
  • Leeuwenhoek made the first microscope in  1676 and found little living organsisms that he called animalcules
  • Pasteur created a flask to show that there is something living in the air that can contaminate sterile solutions in 1861
  • Koch added to the germ theory by making 4 postulates: Identify, isolate, inject, and take out to identify microbes 1890
  • In 1546 Girolamo Francastoro proposed the germ theory which stated that diseases can be spread by microbes 
  • In 1668, Redi discovered that maggots do not come from meat which disproved spontaneous generation
  • In 1854, Snow traced cholera through the water system in london and found the contaminated water well
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