In these multiple images of P. aeruginosa biofilm a bacterial community that takes the form of mushroom-like structures. The main, upper left image looks down at the biofilm, the lower, right-hand images show cross-sections. This biofilm was cultured from the airways of a patient with cystic fibrosis.
Nearly every human bacterial infection—including some of the most serious, life threatening, and costly to treat—can take the form of a biofilm, in which bacteria aggregate into structured communities that enclose themselves within a secreted slime.
