Fig. 8

Histopathology of mouse lung 1 day, 28 days and 3 months after pulmonary exposure to 18 µg GaP NWs. Day 1: Inflammatory infiltrates with prominent eosinophils (arrowheads). Day 28: Pulmonary alveolar proteinosis (asterisk). 3 months: Histological changes receded. Brightfield microscopy of H&E stained tissue. N = 3 at 1 day and 3 months. N = 5 at day 28. Panels c), f) and i) correspond to the marked regions in b), e) and h) at higher magnification