Coloured scanning electron micrograph (SEM) of Escherichia coli bacteria. E. coli are Gram-negative rod-shaped bacteria that are part of the normal fl

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Coloured scanning electron micrograph (SEM) of Escherichia coli bacteria. E. coli are Gram-negative rod-shaped bacteria that are part of the normal flora of the human gut. Some strains produce a toxin that causes severe diarrhoea and can be fatal, especially in the very young or elderly. Magnification: x27,800 when printed at 10 centimetres wide.

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Size: 3826px × 4650px
Photo credit: © Science Photo Library / Alamy / Afripics
License: Licensed
Model Released: No

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