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384 BCE
Aristotle
Aristotle proposed that life arose from nonliving material if the material contained pneuma. As evidence, he noted several instances of the appearance of animals from environments previously devoid of such animals -
Antonie Van Leeuwenhook
He discovered the "protozoa" a single celled organism and called them "animalcules." He also improved the microscope and laid the foundation for microbiology. -
Carolus Linnaeus
He created the classification system. They are divided into family, genus, and species -
Edward Jenner
He invented the vacinnation for smallpox. He inserted the vaccine into the arm of a local boy and exposed him to smallpox. He was immune. -
John Snow
He is known as the father of modern epidemiology because of his efforts to determine how cholera spreads. He also for the statistical mapping methods he initiated. -
Florence Nightingale
She was a British nurse, statistician, and social reformer who was the foundational philosopher of modern nursing. She also established the first scientifically based nursing school. -
Louis Pasteur
He disproved the spontaneous generation and proved the Theory of Biogenesis. It is the idea that living things can only arise from other living things. -
Joseph Lister
He came up with new principles of cleanliness for surgery. He introduced aseptic techniques to reduce microbes in medical settings and prevent wound infections. -
Robert Koch
He established Koch's postulate - a sequence of experimental steps that verified the germ theory. He also developed pure culture methods. -
Hans Ernst August Buchner
He discovered a natural occurring substance in the blood - known as complement - that is capable of destroying bacteria. He also devised methods of studying anaerobic bacteria.
