(A) At 12, 24, and 36 hrs post infection, bacterial burdens were quantified in the lung homogenates of mice infected with 1.0× 106 CFU of TIGR4 or JEN11 (**P=0.0012 for 24 hrs and *P=0.0262 for 36 hrs). (B) After 12, 24, and 36 hrs post infection, bacterial burdens were quantified in the BAL of mice infected with 1.0× 106 CFU of TIGR4 or JEN11 (*P=0.0157 for 24 hrs). The horizontal bars indicate the medians. These data are representative of three independent experiments.