Figure 5From: Synergistic effects of sequential infection with highly pathogenic porcine reproductive and respiratory syndrome virus and porcine circovirus type 2Changes in cytokine levels in each experimentally infected group. (A) The concentration of TNF-α was significantly higher in the HP-PRRSV/PCV2 group than in the other groups. The concentrations of IFN-γ (B) and GM-CSF (C) were lower in the coinfection groups, especially the HP-PRRSV/PCV2 group, than in the single-infection groups. (D) The concentration of IL-10 was higher in the coinfection groups, especially the HP-PRRSV/PCV2 group. Error bars show the standard deviations. * indicates significantly higher or lower values. * p < 0.05, ** p < 0.01; and n.s., not significant.Back to article page