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He articulated the theory of spontaneous generation which is that life can arise from nonliving matter. He believed frogs and mice came from mud or dust.
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He was the first to observe and record bacteria, spermatozoa, and blood flow. He was considered “The Father of Microbiology,” after developing the powerful lenses he discovered the single-celled organisms.
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Linnaeus written in his thesis about malaria and its causes in two weeks was thesis was proved right. In 1737 the Systema Naturae came to the world this later was called taxonomy this allowed Linnaeus to look at animals teeth to see if they were related to others, this is still used in modern day if no DNA is present.
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In 1796 Jenner carry out an experiment that there is a way to not get smallpox. By 1798 he published his results and coined the word vaccine.
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He developed the germ theory which helped to understand diseases. He later investigated that these germs can be killed by heating the liquid now called pasteurization.
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1850s she volunteered at Middlesex hospital which was unsanitary and diseases spread rapidly during this time it was her mission to improve hygiene which lowered deaths. In 1854 she was asked to go the British based to go treat the wounded inside the hospital it was filthy and the soldiers kept dying she procured brushed and sanitized the whole hospital.
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In August 1854 Snow discovered that Cholera was caused by the the water pump in Broad Street. He was able to make anesthetics safer and more effective on humans.
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In 1867 Lister published his journal called the Lancet which contained solutions to decrease deaths. He used Carbolic acid to clean human flesh and his hands he discovered sterilization.
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In 1870-72 he was to investigate the spread of infectious bacterial diseases. In 1890 he formulated four criteria that was the cause of infectious diseases this was later called “Koch postulates.”
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1886-90 he discovered a substance in the blood now know as complement that is capable of destroying bacteria. He also devised methods of studying anaerobic bacteria.
