06. Medical science: phagozytose of e.-Coli Bacterias
Electron microscopy

The Picture shows a white blood cell (macrophage, yellow) engulfing Escherichia coli bacteria (pink rods). This process is called phagocytosis. Macrophages are cells of the body's immune system. They phagocytose and destroy pathogens, dead cells and cellular debris.

E. coli bacteria are found in the lower intestines of most mammals. They are usually harmless, but some strains can cause food poisoning, septicaemia or meningitis. Coloured scanning electron micrograph, Magnification: x9,600, x10,000 and x1,700