Germ Theory

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  • Created by: emmy
  • Created on: 27-10-12 11:22
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  • Germ Theory
    • Step 3
      • In the 1850's Louis Pasteur (French scientist) became interested in micro- organisms
        • When he was asked to examine why beer was going bad
          • He found out that particular micro-organisms were vigorously growing. The solution was to boil the liquid
            • He was ambitious and wanted to share his ideas....
    • Step 5
      • Pasteur proved that micro- organisms made beer go bad
        • He said "If wine and beer are changed by germs, then the same can and must happen sometimes in men and animals"
          • Germ Theory: Harmful germs enter the body, grow rapidly and cause the disease
        • Had an opportunity to see if this theory was right on silk worms- and he could the particular micro- organism in the silk worms too
    • Step 6
      • A German doctor (Robert Koch) tried to challenge Pasteur's idea
        • But rather than proving the idea wrong he proved once and for all that specific micro- organisms cause specific human disease
  • Step 1
    • Germ Theory
      • Step 3
        • In the 1850's Louis Pasteur (French scientist) became interested in micro- organisms
          • When he was asked to examine why beer was going bad
            • He found out that particular micro-organisms were vigorously growing. The solution was to boil the liquid
              • He was ambitious and wanted to share his ideas....
      • Step 5
        • Pasteur proved that micro- organisms made beer go bad
          • He said "If wine and beer are changed by germs, then the same can and must happen sometimes in men and animals"
            • Germ Theory: Harmful germs enter the body, grow rapidly and cause the disease
          • Had an opportunity to see if this theory was right on silk worms- and he could the particular micro- organism in the silk worms too
      • Step 6
        • A German doctor (Robert Koch) tried to challenge Pasteur's idea
          • But rather than proving the idea wrong he proved once and for all that specific micro- organisms cause specific human disease
  • 1st microscope invented by  Anthony van Leeuwenhoek
    • Step 1
      • He presented his findings to the Royal Society in London
    • The images were fuzzy and distorted though. He saw that everything contained tiny organisms (he called animalcules)
      • 1st microscope invented by  Anthony van Leeuwenhoek
        • He presented his findings to the Royal Society in London
    • Step 2
      • Better glass was being produced
    • Better glass was being produced
    • Joseph Lister (British Scientist) developed the microscope in 1830
      • Could be magnified 1,000 times without distortion. Then observed behaviour of micro- organisms
    • Step 4
      • .... He had an opportunity to spread his theory in 1860
        • The French Academy of Science organised a competition for scientists to prove/ disprove the 'Spontaneous Generation'  (an old theory about causes of decay
          • Pasteur was against Pouchet (leading French Scientist) in this experiment
            • Pasteur used experiments to prove his theories were correct, and in 1861 he published hes 'Germ Theory'
    • .... He had an opportunity to spread his theory in 1860
      • The French Academy of Science organised a competition for scientists to prove/ disprove the 'Spontaneous Generation'  (an old theory about causes of decay
        • Pasteur was against Pouchet (leading French Scientist) in this experiment
          • Pasteur used experiments to prove his theories were correct, and in 1861 he published hes 'Germ Theory'

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