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The significance of Shiga toxin (Stx)-producing Escherichia coli (STEC) O157:H7 as the major cause of hemorrhagic colitis and the hemolytic-uremic syndrome (HUS) worldwide has been well established (for reviews, see references211, 312, 413, and 604). The recognition of this pathogen
Karch et al. (Fri,) studied this question.