Relative expression of TNF-α and IL-1β genes in spleen tissue of Nile tilapia.
T1: control group, T2: 0.5% garlic oil, T3: 1% garlic oil, T4: 0.5% ginger oil, T5: 1% ginger oil, and T6: 0.5% garlic oil + 0.5% ginger oil.
Bars with different letters point to significant differences between groups (P < 0.05).