London, United Kingdom
Bacterial Contamination, Sem
Photograph - Photograph
Bacterial contamination, coloured scanning electron micrograph (SEM). Escherichia coli bacteria in a cell culture. This contamination has come from an unclean water source. 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 x6500 when printed at 10 centimetres across.
May 12th, 2013
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