Figure 3From: Diffusely adherent Escherichia colistrains isolated from children and adults constitute two different populationsSEM analysis of mixed biofilms. Biofilms inhibited by zinc show thick pili (A, C) that are not visualized in biofilms insensible to zinc (B,D). Pili are seen mediating cell-to-cell interaction and adhesion to surface (white arrows). Fimbrial structures resembling curli can be observed in some samples (black arrows).Back to article page