Injury (log CFU/mL) was determined by subtracting raw number of
cells recovered on non-selective TSA from raw number of cells recovered
on selective TSA3 and transforming to log10 CFU/mL. Percent injury
(reported as a percent of the raw number of cells injured) determined
by the formula: PI = (1 − Ns / Nns) × 100%, where PI is percent injury,