FIG. 2.

RyhB suppresses virulence-associated phenotypes of S. dysenteriae. (A) Plaques formed in a Henle cell monolayer infected with an equal number of S. dysenteriae wild-type strain ND100 cells carrying either the vector control or pryhB. (B) Invasion efficiencies of S. dysenteriae wild-type strain ND100 carrying pryhB and the strain carrying the vector control. The invasion efficiency is expressed relative to that of the strain carrying the vector control, which was defined as 100%. The data are the averages of five independent experiments, and the error bars represent one standard deviation. All assays were carried out following growth of each strain in the presence of 200 μM IPTG to induce expression of ryhB from pryhB.