Fig. 3

Changes of Serum inflammatory Cytokines and CD4 and CD8 in dairy cows with different somatic cell counts (SCC). , high SCC (SCC ≥ 500,000 cells ml^− 1, n = 33); , middle SCC (200,000 cells ≤ SCC < 500,000 cells ml^− 1, n = 20); , low SCC (SCC < 200,000 cells ml^− 1, n = 23). IL, interleukin; TNF, tumor necrosis factor; PSGL-1, p-selectin glycoprotein ligand-1. Error bars indicate SEM. a, b, c: Different letters within the same week differ (P < 0.05)