E. coli. Coloured transmission electron micrograph (TEM) of an Escherichia coli bacterium. E. coli are Gram-negative bacilli (rod-shaped) bacteria. Long flagellae (light blue) enable the bacterium to be motile; the green filaments on the sides of the bacterium are pili,thin strands of protein used when two bacteria conjugate (transfer DNA). This bacterium is a normal inhabitant of the human intestine. However,under certain conditions its numbers may increase,causing infection. It can cause "traveller's diarrhoea" and urinary tract infections such as cystitis. Magnification unknown | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / DR LINDA STANNARD, UCT |
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