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Viable cell numbers of L. monocytogenes biofilm over a 4-h period. The initial concentration was 8.6 × 108 CFU ml−1. ■ and ●, wild type incubated at 22 and 37°C, respectively; □ and ○, nonflagellated mutant incubated at 22 and 37°C, respectively. Error bars show the standard deviations of six values from triplicate samples.
