Confocal scanning laser microscopy (CLSM), using CAAF(green) Fun1(red) stained biofilm. The red color of the FUN 1 cell stain was localized in dense aggregates in the cytoplasm of metabolically active cells. Thus, areas of red fluorescence represented metabolically active cells, and green fluorescence indicated cell wall-like polysaccharides, while yellow areas represented dual staining.
Biofilms on bronchial epithelial cells in vitro.
Images kindly donated by Frank-Michael C. Müller, Pediatric Pulmonology, Cystic Fibrosis Centre and Infectious Diseases, Department of Pediatrics III, University of Heidelberg, Im Neuenheimer Feld 430, D-69120 Heidelberg, Germany.