Some signs that seem alarming may actually be harmless: Bright-red stools are more likely to come from eating beets than from intestinal bleeding.

有些看起来很可怕的信号其实也许是无关大碍的：粪便呈鲜红色很可能是因为你吃了甜菜，而不是什么肠道出血。

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Infections due to enterohaemorrhagic (causing intestinal bleeding) e. coli, e.g. E.coli O157, and listeriosis are important foodborne diseases which have emerged over the last decades.

由肠出血性(引起肠出血)大肠杆菌，例如O157型大肠杆菌，以及利斯特菌病造成的感染是在过去几十年里出现的重要食源性疾病。

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Major complications for intestinal bleeding, intestinal perforation.

主要并发症为肠出血、肠穿孔。

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Moreover, he says, aspirin may have more side effects--it can cause ulcers or intestinal bleeding.

FORBES: Is Lipitor The New Aspirin?

Many E.coli strains are harmless, but the more serious ones can cause serious illness, including vomiting, diarrhoea and, in severe cases, intestinal bleeding.

BBC: Two more in nursery E.coli outbreak