Number of PMNs in the liver after treatment with sterile saline (□) or LPS (▩). A slight increase of PMNs at 1 to 3 hours and a significant increase at 6 hours in the LPS-treated group were observed. The number of cells is expressed per mm² of semithin section (0.2 μm). Data are expressed as mean ± SD. Bars represent SD. *P < .01, **P < .05 versus saline treatment. Five rats per group were examined.