FIG. 1.
Percent survival of strains UW (filled symbols) and UWS (open symbols) following treatment with 15 mM H2O2. The cultures were normalized to an OD600 of 1.0 in BB, and the levels of survival were determined for (A) 7-h (circles), 14-h (diamonds), and 24-h (squares) cultures before and after peroxide treatment and for (B) 36-h (circles), 48-h (diamonds), and 72-h (squares) cultures before and after peroxide treatment. Dashed lines indicate that no CFU were recovered following 30 min of peroxide treatment.