cholera epidemic hit England in 1854, Dr. John
Snow described it as "the most terrible outbreak
of cholera which ever occurred in this kingdom."
him with an opportunity to test his theory, that
water carried cholera.
charting the incidence of the disease, he showed
that over 500 cases occurred within 10 days over
a radius of some 250 yards centered on London's
Broad Street. He looked for some poison which
he believed came from the excreta of cholera patients
and was swallowed by the new victims. A common
factor was their use of water from the Broad Street
pump that had been polluted with sewage. Snow
had traced the pipelines of various water companies
and showed that one was infected by cholera.
the methodical process of elimination, he proved
his point: A workhouse in that area had its own
private well, and there were only 5 deaths among
its 535 inmates. A brewery on Broad Street likewise
never used the water from the Broad Street pump,
and it had no cases among its 70 workers. The
solution was to remove the handle at the Broad
Street pump, which elimiated the continuence of
company name, Broad Street Solutions,
recognizes the importance of epidemiology in infection
more information see Dr.
John Snow and the London cholera epidemic of 1854
of London cholera epidemic of 1854.
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