Number and profile of leukocytes recovered in BAL fluid from S. aureus-inoculated lungs at 24 and 96 h postinfection. (A) Total number of leukocytes recovered in BAL fluid from 8325-4-, DU5883- and DU5883(pFnBPA4)-inoculated lungs. (B) Percentage of neutrophils (black bars), macrophages and monocytes (diagonally striped bars), and lymphocytes (horizontally striped bars) in BAL fluid from control and 8325-4-inoculated lungs. ∗, P < 0.05 versus control; ∗∗, P < 0.01 versus control; ∗∗∗, P < 0.001 versus control.