Shiga toxin (Stx)-producing Escherichia coli (STEC) of serogroup O174 are human pathogenic intimin gene (eae)-negative STEC. To facilitate diagnosis and subtyping, we genotypically and phenotypically characterized 25 STEC O174 isolates from humans with different clinical outcomes and from animals and the environment. fliC genotyping resulted in four different genotypes (fliCH2 : n = 5; fliCH8 : n = 8; fliCH21 : n = 11; fliCH46 : n = 1).
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