Table 5.

Oxidative stress and immune status of nursery pigs fed diets with soy protein concentrate, enzyme-treated soy protein, and fermented soybean meal replacing animal protein supplements^a

Item	Treatment						SEM	P value
	CON		SPCb	ESBb	FSBLb	FSBBb		CON vs. SPC	CON vs. ESB	CON vs. FSBL	CON vs. FSBB
Jejunal mucosa
IL-8c, pg/mg of protein	525	479		531	518	467	44	0.462	0.932	0.907	0.355
TNF-αd, pg/mg of protein	0.39	0.60		0.63	0.95	0.72	0.13	0.259	0.203	0.003	0.073
IgAe, µg/mg of protein	2.95	2.97		4.21	3.60	3.41	0.82	0.980	0.142	0.436	0.585
IgGf, µg/mg of protein	0.64	0.78		0.75	0.84	0.75	0.09	0.255	0.351	0.089	0.360
Protein carbonyl, nmol/mg of protein	1.93	1.59		1.38	1.56	1.60	0.34	0.290	0.098	0.247	0.300
MDAg, nmol/mg of protein	0.30	0.37		0.37	0.40	0.34	0.04	0.174	0.210	0.065	0.480

^an = 12

^bSPC, ESB, FSBL and FSBB: basal diet with soy protein concentrate (X-Soy 200, CJ Selecta, Araguari, MG, Brazil), enzyme-treated soybean meal (HP 300, Hamlet Protein Inc., Findlay, OH, USA), fermented soybean meal with Lactobacillus (FerMex 200, Purina Animal Nutrition, Shoreview, SD, USA), and fermented soybean meal with Bacillus (Soytide, CJ Bio, Jung-gu, Seoul, Korea), replacing 1/3, 2/3, 3/3 of animal protein supplements in P1, P2, P3, respectively

^cIL-8 Interleukin 8

^dTNF-α Tumor necrosis factor alpha

^eIgA Immunoglobulin A

^fIgG Immunoglobulin G

^gMDA Malondialdehyde