Endotoxin staining in the liver tissues of rats. Immunohistochemical stain of the liver sections using a monoclonal antibody against lipid A shows positive staining in the Kupffer cells, hepatocytes, and the sinusoidal endothelial cells at 3 h (A), 1 week r(B) and 3 week (C) after sham-operated; and at 3 h (D), 1 week (E) and 3 week (F) after BDL. Tissues were counterstained with hematoxylin. Original magnification: × 200. Statistical analyses of the immunohistochemical score of >10% endotoxin in liver sections of the sham (pale bar) and BDL groups (black bar) (G).