Figure 2 Histopathology of the lung after Escherichia coli injection. Lungs from Balb/c mice injected with phosphate buffered saline (A and C) or E coli (B, D, and E) one hour previously were fixed, dehydrated, and embedded according to the Immunohistowax processing protocol and stained with haemalun-eosin. Note the infiltration of neutrophils in alveoli (D) and in arterioles (E). Scale bars, 250 µm (A and B); 25 µm (C–E).