FIG. 3.

Growth curves of D39 wild-type (WT), D39ΔciaR, and D39ΔciaR/phtrA⁺ strains at 37 and 40°C; results are represented as OD₆₀₀ values in panel A and as viable counts after reaching the stationary phase of growth in panel B. A total of 10⁶ CFU/ml of each strain was used to inoculate BHI broth prewarmed at the indicated temperatures, and samples were withdrawn at 1-h intervals to measure the OD₆₀₀ values and viable counts.