John Snow is considered to be the father of contemporary epidemiology because of his studies of cholera outbreaks in London in the mid-1800s. Answer the following questions. a. What was the prevailing idea of what caused cholera? What made Snow question that idea? b. Explain his "Grand Experiment". c. Explain his research into the 1854 Broad Street pump outbreak.
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The prevailing idea at the time was that cholera was caused by "miasma," or bad air. Snow questioned this idea because he noticed that not everyone who was exposed to the bad air got sick, and that some people who were not exposed still got sick. He also observed Show more…
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During a serious outbreak of cholera in London in 1854, John Snow used a map to plot the locations of all the diarrheal cases he learned about. The source of the infection was unknown, but Snow thought that if the cases clustered geographically, he might gain a clue as to the actual source. Snow's map revealed a close association between the density of cholera cases and a single well located on Broad Street. Simply removing the pump handle of the Broad Street well ended the epidemic, proving that the well water was the source of infection.
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