Circulating neutrophil surface CD11b mean fluorescent intensity (MFI) at baseline and 4 hours after laparotomy and endotoxemia ( n = 6 controls, n = 8 all others), experiment 1. No significant differences were found between groups at baseline. Dopexamine was associated with smaller increases in D1 and D2 groups compared with controls. Data presented as mean (SEM). Two-way ANOVA (Bonferroni posttests, **P < 0.01, ***P < 0.001 compared with controls).