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E. Coli Bacteria, Sem
Photograph - Photograph
E. coli bacteria. Coloured scanning electron micrograph (SEM) of Escherichia coli bacteria. These bacteria are a normal part of the intestinal flora in humans and other animals, where they aid digestion. However, some strains, for instance E. coli O157, can produce a toxin that leads to severe illness, or even death. Normal strains can also produce infections in weakened or immunosuppressed people. Magnification x10,000 when printed 10 centimetres tall.
May 7th, 2013
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