DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Coloured scanning electron micrograph (SEM) of Vibrio cholerae is a Gram-negative, enteric, facultatively anaerobic, curved (comma-shaped) rod prokaryote. It is the bacterium that causes Asiatic cholera. The bacterium lives naturally in brackish or coastal saltwater. A person can get cholerae by drinking water or eating food contaminated with the cholera bacterium. The bacteria infects the intestine and increases mucous production causing diarrhoea and vomiting which result in extreme dehydration and possible death. In an epidemic, the source of the contamination is usually the faeces of an infected person that contaminates water or food. Magnification: x1,945 when shortest axis printed at 25 millimetres.
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