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Conservation of E. faecalis microcolony morphology by SEM under a wide range of experimental conditions, from in vitro growth on fluoropolymer surfaces to in vivo model systems. (A) An in vitro E. faecalis biofilm formation on Aclar fluoropolymer membranes (8 h post-inoculation). Scale bar = 1 µm (B)Ex vivo E. faecalis biofilm formation on porcine cardiac valves (4 h). Scale bar = 2 µm (C)In vivo colonization of the germ-free murine GI tract at 96 h. Scale bar = 5 µm
