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RpoE is a positive virulence regulator of E. coli K1. (A) Fold changes in genes transcription in the rpoE mutant strain relative to their expression in the WT strain are shown. (B) Capsule morphology Scale bar, 3 μm. Capsule staining of WT, ΔneuDB, and ΔrpoE strains * p < 0.05; ** p < 0.01; *** p < 0.001.
