Figure 2

Biofilm formation by the six Enterobacteriaceae strains responsible of infections. These strains were compared with their respective isolates pre-transplant (Pre-T) or isolates from rectal swabs post-transplant (colonizing strains, C-S). Up: wells were stained with Crystal Violet inside 24-well plates. Source of isolation during infections is indicated. Down: representative examples of CLSM images of selected strains after biofilm formation. Bacteria were stained with the BacLight LIVE/DEAD viability kit. Live cells fluoresce in green with Syto 9 dye and dead cells are stained red with propidium iodide. Original magnification: ×200.