3D rendering of a flow-cell grown biofilm of P. aeruginosa constitutively expressing GFP, acquired via confocal microscopy.
P. aeruginosa biofilm after treatment with tobramycin. Cells in the periphery of the biofilm aggregate are dead (red) while cells in the middle are alive (green). The yellow region contains both living and dead cells. The left image is a cross-section of the biofilm aggregate; the right is a side view. Image modified from Tseng et al., 2013.
As it moves on a surface, P. aeruginosa (white) leaves a trail of polysaccharide (red) on that surface. Image modified from Zhao et al., 2013.
Understanding how (and why) bacteria form multicellular communities