DR KARI LOUNATMAA / SCIENCE PHOTO LIBRARY DR KARI LOUNATMAA / SCIENCE PHOTO LIBRARY
E. coli 0157:H7 bacteria. Colour scanning electron micrograph (SEM) of Escherichia coli 0157:H7 bacteria, cause of foodborne illness. This strain was responsible for the outbreak of food poisoning in Scotland in 1996, when over a dozen people died and hundreds were taken ill. It causes bloody diarrhoea and occasionally kidney failure, particularly in the elderly and the very young. The strain originates from the intestines of some cattle and spreads to contaminate beef and milk. Pasteurisation of milk and thorough cooking of all meat helps to prevent its transmission. Magnification: x11, 200 at 5x7cm size.
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