Category C - full version without watermark 1024x576 (check terms and conditions at www.teledesign.de) The embed version with watermark is free of charge. Text: Enterohemorrhagic Escherichia coli cause a bacterial infection of the gut flora. The germs attack the intestinal mucosa which leads mostly to an inflammatory response. First signs are loose stools which may contain blood in severe cases. The toxins excreted by the bacteria reach the blood stream and can not only destroy the red blood cells but can cause also considerable damage to the vessel walls, leading to hematomas. This disease state is called the hemolytic uremic syndrome or HUS. Further disease progression leads to weakness associated with anaemia and finally to renal failure.