Fig 6.

Biofilm formation by aEPEC 1551-2 and derived mutants. (A) Quantitative determination of crystal violet adsorption upon biofilm formation by the indicated strains. Biofilm formation by 1551-2 is dependent on T1P production but not on T3SS or the T2SS substrate. (B) Pellicle formation at the air-liquid interface upon bacterial growth in glass tubes. This phenotype was dependent on T1P production. (C) Images comparing yeast agglutination by the indicated strains. ***, significantly less adherent than 1551-2 (P < 0.0001); ###, significantly more adherent than 1551-2 ΔfimA (P < 0.005).