FIG. 1.

Cell and fluid accumulation in the pleural space of guinea pigs with tuberculous pleurisy. Cells (A) and pleural fluid (B) in the pleural space of pleuritic guinea pigs were quantified between days 1 and 9 of the inflammatory response. Cells were stained with trypan blue, and four squares of a hemocytometer were counted and averaged to obtain cell numbers, which are expressed in millions. Total milliliters of pleural fluid were assessed after the fluid was centrifuged and removed from cells. Data and error bars represent average cell number or fluid accumulation for three or four animals ± the standard error of the mean. An asterisk indicates a significant difference in the cell number compared with that on any other day.