2 BISC_120 Medical Relevance - Manahan

2 BISC_120 Medical Relevance - Manahan - General Biology...

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1 General Biology 120 Wednesday, August 25th, 2010 Lecture Topic: Overview – Medical Relevance Reading: Pages 92-93 Dr. Donal T. Manahan Professor of Biological Sciences 1866 “Tree of Life” Ernst Haeckel Modern view of biological diversity The importance of knowing about biological diversity. August Krogh Nobel Prize Winner, 1920 “For many problems there will be some animal of choice on which it can be most conveniently studied.” Natural Products as Medicines Most medicines were derived from PLANT sources prior to the middle of the 20 th Century. ~600 medicinal plants catalogued during the reign of Roman Emperor Nero (“Fire” AD 64) were used for ~1500 years (until early Renaissance period)
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2 Microbes were not important sources of medicines until 1920s Nobel Prize in Physiology or Medicine Alexander Fleming, 1945 “Antimicrobial substance not toxic to humans” Penicillin Penicillium mold Colonies of staphylococcus bacteria Bacterial cell division Cholera Deaths (death from severe dehydration; treatment available)
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This note was uploaded on 09/21/2010 for the course BIO 120 at USC.

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2 BISC_120 Medical Relevance - Manahan - General Biology...

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