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Dendrogram derived from RAPD PCR data for Czech and German SF STEC O157:H− strains, NSF STEC O157:H7/H− strains, and SF Stx-negative E. coli O157:H19/H45 strains with the GelCompar software package. The characteristics of the strains are given in Table 2. The similarity scale is shown above the dendrogram (a similarity index of ≥80% indicates clonal relatedness).
