april1 - Plague: from Latin Plaga = a blow or a stroke...

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Plague: from Latin Plaga = a blow or a stroke Cause = Yersinia pestis Discovered by Alexandria Sanc In most countries, plague is called “pest” from name Commonly infects rodents, most worried about house rat which play central role in spreading plague, plague in rats before in humans Fleas infect rat, live until host dies, move on to next, settle for human if no rats First cases of black death were in Cicily Fleas go to hairy parts of body, germ goes to lymphatic system, lymph nodes swell near the site of bite Most common form = bubonic plague (a bubo, from Greek for groin, is a swollen lymph node) Most common site is in groin Commonly held arm p to relieve pressure from bubo Most dangerous form = pneumonic plague When lungs involved, extremely contagious, coughing germs out, anyone near will be infected Could not be survived before antibiotics Europe had very little experience with plague after 600 AD….until the disease was introduced from the mid-east in October, 1347 Plague receded into the middle east in between these dates Disease moved to eastern mediteranean, up the coast of the sea, into lower Europe and up to the rest of Europe Mortality in Europe = 1/4 to 1/3 of total population, or 25 to 33 million Read Defoe, Journal of the Plague Year (1722)
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This note was uploaded on 06/03/2010 for the course BIOL BIO 101 taught by Professor Drumheller during the Spring '10 term at University of Washington.

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april1 - Plague: from Latin Plaga = a blow or a stroke...

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