CXCL8 and infection: After 5 days of infection (2 h after the last treatment), mice were killed, and the BALF was collected and analyzed for the total and differential cell count, protein content, as markers of vascular permeability, and interleukin (IL)-1β, tumor necrosis factor (TNF)-α, and KC, the analogue of IL-8 in the mouse, levels as indices of inflammation.