Fig. 5
Effect of HS and supplemental 25-OH-D3 in broilers at d 39 on blood and immunological indices; A representative images of spleen and bursa, B relative weight of thymus, spleen and bursa, C detection of leukocytes and thrombocytes in whole blood, RT-PCR analysis of D pro-inflammatory cytokines (including interleukin (IL)-1β, IL-6 and tumor necrosis factor-α (TNF-α)) and anti-inflammatory cytokines transforming growth factor-β (TGF-β) in ileum and bone marrow, respectively. Treatments Ctrl, PF and HS without common superscript are significantly different at P < 0.05. n.s., denotes no significant difference between HS and HS + 25-OH-D3 at P < 0.05