Figure 2.

Mean (±SEM) serum levels of IL-6, IL-8, IL-10, IL-12, and TNF-α in piglets from the PBS+NC, LPS+NC, LPS + ZnO, and LPS + RAC groups. ^a−d Different superscripts indicate significant differences among treatments and day or sampling time (P ≤ 0.05), ^A−C Different superscripts indicate significant differences among treatments (P ≤ 0.05), ^x,y Different superscripts indicate significant differences among days (P ≤ 0.05), ^m,n Different superscripts indicate significant differences among sampling time (P ≤ 0.05), ^j−l Different superscripts indicate significant differences among day and sampling time (P ≤ 0.05)¹. ¹Blood samples were collected from all piglets (n = 48) on days 7 and 21 post-weaning, and at 1.5 and 3.0 h post i.m. injection of PBS or LPS.