Table 5.

Effects of environment and boron levels (mg/kg) on pro-inflammatory cytokines of gut mucosa in weaned pigs on days 7 and 14

Environment	Boron levels	Day 7		Day 14
		IL-1β (pg/mL)	TNF-α (pg/mL)	IL-1β (pg/mL)	TNF-α (pg/mL)
Good sanitary	0	23.6	1.2	65.5	1.8
	5	9.6	3.3	11.4	1.7
	10	24.6	0.7	56.3	1.2
Poor sanitary	0	14.1	31.7	15.7	2.3
	5	69.0	2.6	44.7	1.9
	10	43.1	1.6	26.8	2.9
SEM		27.11	16.93	31.16	1.13
		---------------------------------------------------- Mean value of main effects ----------------------------------------------
Environment
Good sanitary		19.3	1.7	44.4	1.6
Poor sanitary		42.1	11.9	29.1	2.3
Boron levels
0		18.9	16.4	40.6	2.1
5		32.3	3.0	28.0	1.8
10		33.9	1.1	41.5	2.0
		------------------------------------------------------ Significance of main effects ---------------------------------------------
Environment		0.319	0.473	0.554	0.413
Boron supplementations
Linear		0.597	0.379	0.379	0.984
Quadratic		0.581	0.702	0.702	0.812
		----------------------- Significance of interaction effects from orthogonal contrast -----------------------------
Linear		0.622	0.395	0.749	0.604
Quadratic		0.249	0.588	0.193	0.648

Each simple effect mean represents 6 replicate pens.

IL-1β, interleukin-1β; TNF-α, tumor necrosis factor-α; SEM, standered error of mean.