Fig 5. cSiO₂ elicits perivascular and peribronchiolar lymphocytic infiltration in lungs of NZBWF1 and C57Bl/6 mice.

Representative light photomicrographs of H&E stained lung sections from NZBWF1 mice exposed to vehicle (A), 0.25 mg cSiO₂ (B), or 1.0 mg cSiO₂ (C) and C57Bl/6 mice given vehicle (D), or 1.0mg cSiO₂ (E). Br = bronchiole, bv = bronchial vasculature, ap = alveolar parenchyma. Black arrows indicate lymphocytic infiltration in perivascular and peribronchial regions. Lymphocytic infiltration was semi-quantitatively graded as described in the Materials and Methods (Table 1).