Nonlinear relationship between percent probability of bacterial eradication and log decrease at 24 h (r2 = 85%; P < 0.001). The datum points represent the proportions of successes in empirically selected cells: <2.0-log decrease, 0% success (n = 6); 2.0- to 2.2-log decrease, 50% success (n = 6); 2.3- to 3.0-log decrease, 60% success (n = 10); 3.1- to 3.4-log decrease, 67% success (n = 6); 3.5- to 4.9-log decrease, 83% success (n = 6).