Immunohistochemical reaction for macrophages in the liver of mice inoculated with E. histolytica or E. dispar treated and untreated with dexamethasone. Scarcity of immunoreactive macrophages (arrowheads) adjacent to the debris-rich hepatic necrosis (N) in the groups EGG-DEX (b) and MCR-DEX (d) compared to groups EGG (a) and MCR (c). Non-necrotic hepatic parenchyma (H). Bar 50 μm. Harris's haematoxylin counterstained.