Fig. 4.

Swarming abilities of four L. monocytogenes strains that showed reduced invasiveness in Caco-2 cells but did not have a premature stop codon (PMSC) in inlA. L. monocytogenes strain 10403S and an isogenic ΔflaA strain were included as controls (Table 3). Points represent the logarithmic mean swarming area from four independent replicates for each isolate; error bars represent standard deviations. Means within each temperature with the same letter are not statistically different from each other (overall α = 0.05, Tukey's correction). The strains are indicated by symbols as follows: •, FSL F8-110; □, 10403S; ▪, FSL F8-131; ▴, FSL F8-151; ♦, FSL F8-132; ×, ΔflaA mutant.