FIG. 1.

Effect of oral administration of L. casei strain Shirota on NK cell activity of splenocytes. Splenocytes from mice fed either the control diet (○) or the L. casei strain Shirota diet (•) for 4 months were examined using a short-term ⁵¹Cr release assay. The E/T ratio was 25:1 (A) or 50:1 (B). Each bar represents the mean value for 6 mice. **, statistically significant difference from the control value by Student’s t test with a P value of <0.01; NS, no significant difference from the control value.