Hierarchical clustering of E. coli strains according to adherence systems encoding genes. The dendrogram and associated heatmap are generated on the basis of gene presence/absence considering 78 genes involved in adherence, using binary distance and complete clustering method, R version 3.3.1. [43]. Blue color indicates gene presence, red gene absence. The origin of each strain is identified with B (Bovine) or H (Human). The color of the strain name corresponds to its phylogroup as in Fig. 2. (DOCX 67Â kb
