E. coli bacterium,coloured transmission electron micrograph (TEM). Escherichia coli are Gram-negative rod-shaped bacteria that are part of the normal flora of the human gut. The long hair-like structure are flagella,which are used for locomotion. The shorter hair-like structures are pili,which are used for conjugation. Some strains produce a toxin that causes severe diarrhoea and can be fatal,especially in the very young or elderly. Magnification: x45,000 when printed at 10 centimetres wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Biophoto Associates |
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