FIG. 2.

Differential counts of pleural exudate cells from pleuritic control and anti-TGF-β1-treated guinea pigs. Cells were stained with Diff-Quik as described in Materials and Methods, and cell morphology was used to determine which cell types were present in the pleural fluid. Two counts (300 cells each) were performed, and the number of each cell type was divided by the total number of cells to obtain the percentage. The bars indicate the percentages of the total cell population recovered from the pleural space for three or four animals, and the error bars indicate the standard errors of the means. An asterisk indicates that there is a significant difference between the percentage of a cell type and the percentage in the controls.