Lecture 4 antiquity to middle ages

Lecture 4 antiquity to middle ages - Impact of Infectious...

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Impact of Infectious Disease on Development of Human Societies Lecture 4: Antiquity to Middle Ages
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Ring around a rosie A pocket full of posies Ashes, ashes ( a-tish-oo, a-tish-oo) We all fall down……. This nursery rhyme refers to a disease Any guesses as to which one???
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Infectious disease and human societies As Homo sapiens became more agricultural: more contact with animals and the diseases they carried Communicable diseases develop between time cities first arose (~ 10,000 y.a.) and 500 BC As populations became centralized : disease more easily spread 250,000 for establishment and maintenance of infectious diseases Diseases transmitted to distant neighbors may have been devastating because the population was not resistant
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Factors increasing disease transmission Crowding in the cities Infections transmitted by contact and vectors Farming ingestion Large-scale ritual practices (flooding) Infections transmitted by water gatherings Spread between cities
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Disease became endemic over time Populations adapted to infectious agents Infectious agents adapted to populations Territorial expansion enhanced by endemic disease Populations became resistant to endemic diseases while their neighbors remained susceptible Made territorial expansion much easier (biological threats) Let’s play Sardines!
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It’s because we’re EVIL! Ancient Egyptians and Indians
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Lecture 4 antiquity to middle ages - Impact of Infectious...

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