FIG. 3.

Expression of TGF-β1 and IFN-γ mRNAs during tuberculous pleurisy. Expression of TGF-β1 (A) and IFN-γ (B) mRNAs was quantified in pleural fluid cells obtained from guinea pigs with tuberculous pleurisy between days 1 and 9. Fold induction was determined from the threshold cycle values normalized for 18S expression and then normalized to the values derived from healthy, pleuritis-free animals. Data and error bars represent the mean of three or four animals ± the standard error of the mean. An asterisk indicates a significant increase in mRNA expression compared to that on all other days.