Investigators who are trying to track down the source of E. coli contamination in romaine lettuce are feeling that they’ve seen this movie before.
Over the past six weeks, at least 50 people in the U.S. and Canada have gone to the doctor suffering from the symptoms of food poisoning. They were infected with an identical strain of E. coli bacteria. Most of them remembered eating romaine lettuce.
So on Tuesday, the Centers for Disease Control and Prevention issued a warning: Throw away your romaine lettuce. Hearts of romaine disappeared from supermarket shelves. So did bags of Caesar salad mix.
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