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16 Cards in this Set
- Front
- Back
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1676
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Leeuwenhoek recorded the first accurate observations of the major groups of microorganisms using a simple microscope.
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1798
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Jenner uses cowpox 'vaccinations. To prevent smallpox.
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1850-1860
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Pasteur, Cohn & Lister contributed yo the germ theory (details in handout)
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1869
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Miescher discovered nucleic acids.
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1875
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Cohn founded bacterial systematics
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1876
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Koch demonstrated that Bacillus anthracis caused anthrax (the first bacterial pathogen of animals)
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1880
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Pasteur (studies w/ chicken cholera) developed the concept of Attenuation (reduced virulence) as a general approach to the production of the vaccine.
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1881
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Developed solid media method for pure culture isolation.---- Led to the use of Petri dish and Agar as a solidifying agent.
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1882
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Metchnikoff discovered Phagocytosis [Nobel Prize, 1908]
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1184
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Koch's Postulated was discovered. [Noble Prize 1905]
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Koch's Postulates
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1) recover same microorganism from infected but not from uninfected individual.
2) Make pure culture of microorganism 3) Infect Healthy individual with pure culture-----repeat step 1 |
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1888
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Beijerinck was the first to isolate nitrogen-fixing bacteria
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1890 (I)
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Winogradsky discovered sulfur & nitrifying bacteria.
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1890 (II)
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Beijerinck &Winogradsky developed enrichment culture techniques and demonstrated the importance of bacteria in biological cycling
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1890 (III)
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Behring & Kitasato developed diphtheria antitoxin using inactivated diphtheria toxin [Noble Prize 1901]
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1892
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Ivanowsk provided evidence that tobacco mosaic disease was caused by filterable virus---- passed through chamberland's filters
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