Escherichia coli. Coloured transmission electron micrograph (TEM) of a cluster of the bacteria Escherichia coli. They are rod-shaped bacilli,Gram-negative and motile. Each bacterium has a flagellum (green strands),which it can move to propel itself. E. coli bacteria inhabit the intestinal tract of humans where they play a nutritional role by synthesizing vitamins,especially vitamin K. In this way they are harmless and useful. However,some strains of E. coli are pathogenic,causing diarrhoea and urinary tract infections,and even death. Magnification unknown | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / DR LINDA STANNARD, UCT |
Bildgröße: | 4898 px × 3663 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |