Dendrogram analysis and virtual gel images of DiversiLab rep-PCR fingerprint analysis of ESBL-producing E. coli isolates. For the purpose of predicting different clones, the top match feature at >95% similarity was used (broken line). Clones 15A, 15AR, 15B, and 15BR were identified using PFGE, while ST131 was identified using MLST. MLST was performed on the CTX-M-15-producing isolates. Sample ID, sample identification.