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The lactate permease is not defective for adhesion to epithelial cells. Bacteria were incubated with Chang cells at a multiplicity of infection of 100:1 for 3 h, and adherent bacteria were enumerated by plating. C311ΔlctP associates with epithelial cells at higher levels than the wild-type strain (Student t test, P < 0.01; error bars show the standard error of the mean).
