How the Toilet Changed History

How the Toilet Changed History — page 5
which was known as the miasma theory People believed they could catch cholera by inhaling air infected by exposure to the disease Author Steven Johnson explains what Snow proved about cholera Sanitary conditions were crucial to fighting the disease but foul air had nothing to do with its transmission Cholera wasn't something you inhaled It was something you swallowed CHOLERA The cholera bacteria arrived in London from India in 1831 It is a waterborne disease transmitted primarily through human feces and it affects the stomach As a result a person infected with cholera experiences great bouts of diarrhea Not only is this uncomfortable but one loses great amounts of water at the same time The water loss quickly affects other organs including the liver and kidneys Eventually fatigue settles in and the patient becomes unconscious At the time of the London outbreaks no one knew what caused cholera nor were there any effective remedies Two thirds of those who contracted cholera never recovered Despite the naysayers Snow marked on a map all the deaths in one area of London This revealed deaths were concentrated around a water pump on Broad Street Snow visited homes and businesses in the area One remarkable finding was a nearby brewery was unaffected by cholera Snow believed it was because patrons drank beer not water Confident the water source on Broad Street was contaminated Snow removed the handle of the pump so no one could use it The result was a marked drop in deaths in the area demonstrating a link between cholera and contaminated water Newly gathered data also revealed death 10