Fig. 10. Pulmonary infiltration with neutrophils in mice subjected to high tidal volume (HVT) ventilation in the presence and absence of inhaled hydrogen sulfide (H2S) (60 ppm) or after intravascular administration of sodium sulfide (Na2S) (n = 3 in each group). Lung tissue sections were reacted with antibodies against neutrophils and were compared with lung sections obtained from control mice not subjected to HVTventilation (n = 2). Representative examples of lung sections are displayed in figure 9. Neutrophil concentrations are reported as the number of neutrophils per high power field (magnification ×40).