1 / 8

Louis Pasteur and the Germ Theory Revolution

Explore Louis Pasteur's breakthrough in linking germs to disease, challenging existing theories, using improved microscopes and his pioneering Pasteurisation method. Understand how he battled against Spontaneous Generation Theory and revolutionized the understanding of infectious diseases.

rodneyconner
Download Presentation

Louis Pasteur and the Germ Theory Revolution

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Germ Theory Louis Pasteur finally figures out how diseases are spread

  2. Existing Theories • Miasma & Spontaneous Generation • Disease carried by foul air • Micro-organisms are the result of the process of decay • Pus and gangrene mutates into Germs • Flies and Maggots provided evidence • Non-life creates living organisms

  3. Micro-Organisms • Leeuwenhoek • Dutch clockmaker • Built an early powerful microscope • Examined everything he could • He kept on noticing small living organisms in everything he examined • In food, water, excreta, plaque • He did not know what function they played

  4. Improved Microscopes • Joseph Lister in the 1830s • Improved lens production allowed Joseph Lister to produce microscopes that could magnify 1,000 times • Any scientist could buy this microscope • Micro-organisms could be studied in more detail

  5. Pasteur’s Germ Theory • Pasteur • A Scientist (not a doctor) • Brewery in France • Asked Pasteur to investigate why some vats of alcohol would go bad • His theory • Germ = Germination • A growing, living organism caused the problem • His solution to the problem was to boil the liquid to kill the germs • Pasteurisation • Applied to milk, beer, wine, vinegar

  6. Pasteur battles Spontaneous Generation Theory • French Academy launches competition to prove or disprove Spontaneous Generation in 1860 • Pasteur devises experiments to show that microbes existed in the air • Copy source 2 page 129

  7. Linking Germs to Disease • “If wine and beer are changed by germs, then the same can and must happen sometimes in men and animals” • French Silk Industry • Asked Pasteur to investigate why their silkworms kept dying. • He discovered that a certain germ was responsible for

  8. Homework Task • Task page 129 • Draw a flow chart to show how germs were linked to disease • Explain why each step was important • What factors helped the scientists at each step.

More Related