Circulating neutrophil counts in rats with E. coli pneumonia. As demonstrated in Figures 3A and 4A, neutrophil counts increased in rats after instillation of E. coli pneumonia, and the arterial counts were less than the venous counts, indicating that sequestration of neutrophils was occurring in the lungs. In these samples, the percentage of neutrophils to which platelets were bound is shown in Figures 6 and 7. *Significantly greater than the number before pneumonia, p < 0.05. #Significantly less than the venous counts, p < 0.05.