ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Escherichia coli bacteria. Coloured transmission electron micrograph (TEM) of a section through Echerichia coli bacteria. These Gram-negative bacteria are found in the intestines of humans and some animals, and usually cause no problems. Some strains of E. coli can cause food poisoning when eaten, however, which can lead to bloody diarrhoea and gastroenteritis. Magnification: x10,000 at 6x4.5cm size.
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