PFGE dendrogram of Sac II restriction digest. PFGE dendrogram (Sac II restriction digest) and the association with PFGE patterns of Sma I restriction digest, toxinotype, PCR ribotype, origin and antibiotic susceptibility testing. The dendrogram is coded according to origin; human isolates (*) and animal isolates (■). The MICs are given in terms of mg/L. The bars represent the groups (1-5) of human and animal isolates having identical Sma I and/or Sac II banding pattern.