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False-colour transmission electron micrograph of the bacterium Vibrio cholerae (Gram-negative), cause of cholera in humans. Cholera is an acute infection of the small intestines causing severe vomiting & diarrhoea leading to dehydration. Dehydration may result in rapid death. The bacterium is a water borne pathogen, transmitted to humans through drinking water contaminated by human or animal faeces. Outbreaks of cholera are associated with poor sanitary conditions & often occur in epidemics. The bacterium moves by means of a flagellum (seen here). The orange region at left is the nucleic acid. Magnification: x8820 at 35mm size, x16,500 at 6x7cm size.
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