CD14 and acute respiratory distress syndrome: Immunofluorescence microscopy showed that 5 days after ARDS induction, infiltration of the lung parenchyma by CD11+, CD14+, F4/80+, and CD40L+ inflammatory cells was the highest in untreated ARDS rats, was significantly and progressively lower across the ARDS + SW, ARDS + Mito, and ARDS + SW + Mito groups, and was the lowest in SC rats (Figures 5 and 6).