Infection with WT S. aureus is associated with increased immune cell recovery from lung tissue. Histogram plots of total cell count (A), CD3+ T cells (B), and GR1-positive (GR1+) neutrophils (C) recovered from the lungs of mice infected with WT S. aureus, Hla−
S. aureus, or PBS control. Bars represent average ± SEM. Results are derived from 4 PBS-treated mice, 21 WT-infected mice, and 14 Hla−-infected mice. P values are indicated: *, P < 0.05; **, P < 0.01; ***, P < 0.001.