Fluorescence images of in vivo Candida albicans biofilm with both FUN-1 and ConA stains after 24 hours of development. A view of the catheter wall and intraluminal biofilm in an end-on orientation is shown. (A) Image capture was set for simultaneous visualization of both green and red fluorescence. (B) Image capture was set for visualization of red fluorescence. Cells fluorescing red are metabolically active. Images by David Andes from D. Andes, et al. Development and Characterization of an In Vivo Central Venous Catheter Candida albicans Biofilm Model. Infection and Immunity, 72(10):6023-6031.