Inflammatory cytokines: MCP-1 (monocyte chemoattractant protein-1), IL-6 (interleukin-6), and TNF-α (tumor necrosis factor-α). NC (normal control broilers), HC (STZ-induced broilers), and quercetin (0.02%, 0.04% and 0.06%) groups. Statistical analysis was performed by one-way ANOVA followed by Tukey’s test. Values are expressed as thee and . Values with different letters are significantly different ().