ERRATUM
Volume 3, no. 5, e00444-18, 2018, https://doi.org/10.1128/mSphere.00444-18. In the originally published Fig. 1, the labels for panels C and D contain some incorrect values for XIP concentrations. The correct concentrations are given in the revised portion of the figure shown below.
In the “Construction of comS point mutant” paragraph of the Materials and Methods section, the following sentence should be added at the end. “The comS point mutant is an unpublished strain that was constructed and kindly provided by Sang-Joon Ahn of the University of Florida College of Dentistry.”

