TABLE 1.

IFN-γ concentrations in supernatant fluids from PBMC cultures^a stimulated by S. mutans and L. casei

Bacterial concn (ml−1)	IFN-γ concn (ng/ml)b in culture stimulated with:		P
	S. mutans	L. casei
PBMC control	0.00 (0.00–0.00)	0.00 (0.00–0.00)	0.7878
104	1.88 (0.51–6.94)	0.00 (0.00–0.02)	<0.0001
105	8.06 (2.28–28.55)	0.02 (0.00–0.10)	<0.0001
106	6.76 (1.56–29.42)	0.25 (0.06–1.01)	0.0020

^aPBMC (10⁶/ml) were stimulated with 10⁴ to 10⁶ S. mutans (n = 17) and L. casei (n = 14) bacteria per ml. The supernatant fluids were harvested after 7 days, and IFN-γ concentrations were assayed by ELISA. 

^bMean (95% CI).