Figure 6From: Synergistic effects of sequential infection with highly pathogenic porcine reproductive and respiratory syndrome virus and porcine circovirus type 2Evolution of the immunocyte subpopulation in each experimentally infected group. (A) The relative proportions of CD3+CD4+CD8– cells to CD3+ cells increased continuously, with the lowest percentage in the HP-PRRSV/PCV2 group. (B) The proportions of CD3+CD4--CD8+ cells increased from 7 dpi, except in the PCV2 group, which showed a decline. (C) NK cells decreased in all groups over time. (D) The number of monocytes was greater in the HP-PRRSV/PCV2 group than in the other groups, and started to increase on day 7. 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