Search results
Results from the WOW.Com Content Network
John Snow (15 March 1813 – 16 June 1858 [1]) was an English physician and a leader in the development of anaesthesia and medical hygiene.He is considered one of the founders of modern epidemiology and early germ theory, in part because of his work in tracing the source of a cholera outbreak in London's Soho, which he identified as a particular public water pump.
It was discovered later that this public well had been dug 3 feet (0.9 m) from an old cesspit that had begun to leak faecal bacteria. Waste water from washing nappies, used by a baby who had contracted cholera from another source, drained into this cesspit. Its opening was under a nearby house that had been rebuilt further away after a fire and ...
Heinrich Hermann Robert Koch (/ k ɒ x / KOKH; [1] [2] German: [ˈʁoːbɛʁt ˈkɔx] ⓘ; 11 December 1843 – 27 May 1910) was a German physician and microbiologist.As the discoverer of the specific causative agents of deadly infectious diseases including tuberculosis, cholera and anthrax, he is regarded as one of the main founders of modern bacteriology.
John Lea's map of cholera cases on or near Sycamore Street in Cincinnati, Ohio, in 1849. John Lea (born 27 January 1782, died 3 June 1862, Cincinnati, Ohio [1]) was a lay epidemiologist most noted today for his contribution to understanding the water-borne nature of cholera.
Lack of treatment of human feces and lack of treatment of drinking water greatly facilitate its spread. Bodies of water have been found to serve as a reservoir, and seafood shipped long distances can spread the disease. Between 1816 and 1923, the first six cholera pandemics occurred consecutively and continuously over time.
The practice of water treatment soon became mainstream, and the virtues of the system were made starkly apparent after the investigations of the physician John Snow during the 1854 Broad Street cholera outbreak demonstrated the role of the water supply in spreading the cholera epidemic. [77]
As to public health, Koch's bacteriologists feuded with Max von Pettenkofer—whose miasmatic theory claimed the bacteria was but one causal factor among at least several—but von Pettenkoffer stubbornly opposed water treatment, and the massive cholera epidemic in Hamburg, Germany, in 1892 devastated von Pettenkofer's position, and German ...
The bacterium as the cause of cholera was discovered by Robert Koch in 1884. Sambhu Nath De isolated the cholera toxin and demonstrated the toxin as the cause of cholera in 1959. The bacterium has a flagellum (a tail like structure) at one pole and several pili throughout its cell surface. It undergoes respiratory and fermentative metabolism.