Louis Pasteur Powerpoint

Louis Pasteur Powerpoint - Louis Pasteur & Germ Theory...

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Louis Pasteur & Germ Theory
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Beliefs about disease in19th Century People knew there was a link between dirt and disease, but could not explain the link. People explained disease as seeds bad seeds in the air known as miasma. 1850s &1860s breakthrough in the cause of disease.
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Step 1: Discovery of Micro- organisms Anthony Van Leeuwenhoek made one of the earliest microscopes. Discovered micro- organisms which he called animalcules. Microscopes not as good as today.
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Step 2: Improved microscopes 1800s purer glass produced = better lenses for microscope. 1830 Joseph Lister develops a microscope which can magnify x1000
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Step 3: Louis Pasteur’s germ theory Old Theory: spontaneous generation micro-organisms are the result of decaying matter. New Theory: germ theory micro-organisms cause decaying matter. Pasteur showed you could kill the micro- organisms by applying heat - PASTEURISATION.
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Step 4: Germ theory vs spontaneous generation Pasteur now had to prove
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Louis Pasteur Powerpoint - Louis Pasteur & Germ Theory...

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