Figure 1.
Clonal relationship between Escherichia coli strains obtained from intestinal biopsies from patients with CD, biopsies or stool from non-CD patients and reference strains. The dendrogram based on pulsed-field gel electrophoresis (PFGE) using the XbaI and SpeI enzymes, allowed the identification of two main groups. Crosses indicate strains isolated from Crohn's disease patients. Clonal related strains are gray shadows highlighted. The reference strains used (Reference) were (*) HM605 (AIEC), (**) NRG857c (AIEC) and (***) HS (commensal E. coli).