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Comparison of biofilm thickness over time between biofilm-only controls and Cryptosporidium-exposed biofilms. Graph showing biofilm thickness (mean ± standard error, n = 6) obtained from both biofilm-only controls (white bar) and Cryptosporidium-exposed biofilms (black bar) using the COMSTAT II quantitative programme. Significant differences were determined using a two-way ANOVA with a post hoc test of significance (* P < 0.01; ** P < 0.0001).
