DR KARI LOUNATMAA / SCIENCE PHOTO LIBRARY DR KARI LOUNATMAA / SCIENCE PHOTO LIBRARY
E. coli bacteria. Coloured scanning electron micrograph (SEM) of Escherichia coli O157:H7 bacteria, a cause of food poisoning. It results in bloody diarrhoea and occasionally kidney failure, particularly in the elderly and the very young. E. coli O157:H7 has been the cause of several lethal food poisoning episodes. 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: x28,600 at 7x5cm size. Magnification: x100,000 at 7x9.5" size.
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