Homework #1: Snow On Cholera

Homework#1 Snow - Snow on Cholera Please read the enclosed Epidemiologic Classic called"Snow on Cholera and prepare your responses to questions

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Snow on Cholera Please read the enclosed Epidemiologic Classic called "Snow on Cholera" and prepare your responses to questions 1-10 for discussion section. We hope that you enjoy reading a part of the story of this brilliant undertaking in reasoning by a medical practitioner. At the time there were no such beings as epidemiologists and microbiologists. John Snow EPID420 Snow-1 rev. 03/31/08
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EPID420 Snow-2 rev. 03/31/08 AN EPIDEMIOLOGIC CLASSIC SNOW ON CHOLERA Introduction Dr. John Snow (1813-1858) was a distinguished British anesthesiologist who, among other accomplishments, administered chloroform to Queen Victoria at the birth of two of her children. His lasting fame, however, is based on his brilliant work elucidating the epidemiology of cholera. The following material consists of excerpts from Snow's classic monograph "On the Mode of Communication of Cholera," Second Edition, 1854 (Snow on Cholera. Haffner, New York, 1965). The entire monograph is fascinating reading, but enough is contained in the portions presented below to give the flavor of the original and to permit the reader to see the type of evidence collected by Snow and the way in which he evaluated it. Read the selections of Snow's work that follow, bearing in mind that the infectious theory of disease was not generally accepted at the time. Disease was usually believed to be caused by morbid poisons coming from dead bodies and decaying organic matter in effluvia, and spread through the air. Historical "The existence of Asiatic Cholera cannot be distinctly traced back further than the year 1769. ..." ".... It would occupy a long time to give an account of the progress of cholera over different parts of the world, with the devastation it has caused in some places, whilst it has passed lightly over others, or left them untouched; and unless this account could be accompanied with a description of the physical condition of the places, and the habits of the people, which I am unable to give, it would be of little use. "There are certain circumstances, however, connected with the progress of cholera, which may be stated in a general way. it travels along the great tracks of human intercourse, never going faster than people travel, and generally much more slowly. In extending to a fresh island or continent, it always appears first at a sea-port. It never attacks the crews of ships going from a country free from cholera, to one where the disease is prevailing, till they have entered a port, or had intercourse with the shore. Its exact progress from town to town cannot always be traced; but it has never appeared except where there has been ample opportunity for it to be conveyed by human intercourse.
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EPID420 Snow-3 rev. 03/31/08 Communication of Cholera from Person to Person "I called lately to inquire respecting the death of Mrs. Gore, the wife of a laborer, from cholera, at New Leigham Road, Streatham. I found that a son of the deceased has been living and working at Chelsea. He came home ill with a bowel complaint, of
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This note was uploaded on 05/12/2008 for the course EPI 420 taught by Professor Goldberg during the Spring '08 term at University of Washington.

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Homework#1 Snow - Snow on Cholera Please read the enclosed Epidemiologic Classic called"Snow on Cholera and prepare your responses to questions

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