Fig. 6

Histopathology of lung samples. Histological assessment shows normal histology in unexposed WT (a) and unexposed mutant (b). One day exposed WT (c) and TLR9^−/−animals (d). WT mice exposed for five days (e) showed little difference to the 5 day exposed mutant mice (f). Lung sections from both WT (g) and mutant mice (h) exposed for 20 days showed normal histology. Bar = 100 micron