FIG. 5.

Survival of wt and higBA mutant V. cholerae cells following exposure to chloramphenicol. Cultures of wt (open bars) and higBA mutant (hatched bars) V. cholerae were grown to an OD₆₀₀ of ∼0.7, split, and either treated with 1 or 5 μg/ml chloramphenicol (Cm) or left untreated. After various times, cultures were plated on LB agar without chloramphenicol to enumerate CFU. Survival represents the number of CFU in treated cultures relative to the number of cells in untreated cultures at the same time point. Each bar is the average value for two to four experiments.