Fig. 7. Effect of recombinant Lactobacillus plantarum on cytokine production in mice. The levels of tumor necrosis factor (TNF)-α and interferon (IFN)-γ in the supernatants of spleen lymphocyte cultures were determined by enzyme-linked immunosorbent assay. Values are the means ± SEM for three mice. Asterisks represent statistically significant differences; ^*p < 0.05, ^**p < 0.01 compared with the control group.