E. coli bacterium. Computer illustration of a flagellated Escherichia coli bacterium. 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. Flagellated E. coli have flagella (tail-like) that enable them to move.
July 24th, 2016
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