FIG. 3.

Time course of IFN-γ production by SAg. PBMC from the same donor as in Fig. 1 were cultured with SAg (1 μg/ml) or LPS (1 μg/ml) for 3, 6, 9, or 18 h. IFN-γ contents of the supernatants were determined by ELISA. All samples were assayed in triplicate, and the results are expressed as means ± SD.