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Expression of the viscA gene per biomass unit in biofilms (blue diamonds) and planktonic cells (red squares) in the initial state of biofilms grown in microtitre wells. Data represent mean ± sd for a representative experiment with five replicates. *Significant difference between biofilm and planktonic cells at each time point (P < 0.05) as well as significant difference from biofilm values at 7 h (P < 0.05).
