Figure 3
Bacteriology. Mice were infected with PA103 (5 × 105 CFU or 6 × 104 CFU) or PA103ΔUT (5 × 105 CFU). The number of viable bacteria remaining in the infected lungs and blood was counted 4 h and 2 days after the instillation. Lung homogenates were sequentially diluted with sterile water and placed on sheep blood agar plates for 24 h at 37°C. 100 μl of blood was plated on agar plates for 24 h at 37°C. a. Number of bacteria remaining in the lungs 4 h after infection. b. Number of bacteria remaining in the lungs 2 days after PA103 6 × 104 CFU infection. c. Bacteremia (CFU/ml of blood) 4 h after infection. d. Bacteremia (CFU/ml of blood) 2 days after PA103 6 × 104 CFU infection. n = 5 in groups. Data are means ± SE. *, p < 0.05 versus C3H/FeJ.