Figure 2.
PFGE-based clustering of 66 STEC O178:H19 strains investigated in this study. Clusters A–E were defined using a cut-off value of 80% similarity and are indicated by different colors. The degree of similarity (%) is shown on the scale at the top left of the figure. stx2d*, mucus-activatable stx2d. All STEC O178:H19 strains possessed espP and iha, and all except strain FP-080 lpfAO113. None of the STEC O178:H19 strains possessed katP, etpD, and toxB.