At least 57 people have fallen ill and are suffering from diarrhoea after swimming in the sea during the World Triathlon Championships in Sunderland, health bosses have confirmed.Roughly 2,000 people took part in the major tournament last weekend, which saw athletes swim in the sea at Roker Beach, which was given a prestigious Blue Flag award for its cleanliness just two years ago.A test run by the UK's Environment Agency just three days before the event revealed that there were 3,900 colonies per 100ml, which is nearly 40 times higher than typical readings from June.
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