CD68 and acute respiratory distress syndrome: Flow cytometric analysis demonstrated that the numbers of Ly6G+, CD14+, CD68+, and CD11b/c+ inflammatory cells were highest in BAL fluid from untreated ARDS rats, were significantly and progressively lower across the ARDS + SW, ARDS + Mito, and ARDS + SW + Mito groups, and were the lowest in the sham control (SC) group (Figure 3).