Number of free and phagocytosed PMNs in the liver after the administration of LPS. The number of free (□) and phagocytosed (▩) PMNs increased rapidly and reached maximal levels at 6 hours. 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 time 0 group. Five rats per group were examined.