FIG. 4.

Pulsed-field gel electrophoresis (PFGE) profiles of selected meat and human isolates of Escherichia coli from the same phylogenetic and sequence group, with similar virulence profiles and random amplified polymorphic DNA profiles. PFGE analysis was done on the selected meat and human isolates using XbaI. The dendrogram to the left of the gel strip images was inferred according to UPGMA, based on Dice similarity coefficients, and reflects the relatedness of the various isolates' PFGE profiles. Specimen identification number and source of the isolate are shown to the right of the gel strips.