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SEM images showing biofilm structures in waterline tubing of DCUs. A, biofilm structures before biofilm removal with BRS® and subsequent disinfection; B, biofilm structures following treatment with BRS®; C, biofilm structures after 6 weeks of treatment in Group A; D, biofilm structures after 6 weeks of treatment in Group B; E, biofilm structures after six weeks of treatment in Group C. Scale bar = 10 μm.
