Abstract
ABSTRACT This study was aimed to screen a high-efficient strain for degrading antigenic protein in soybean meal (SBM) and evaluate the effect of fermented soybean meal (FSBM) on growth performance of piglets. A Bacillus subtilis strain BS12 was selected through plate and fermentation experiment, which reduced 92.36% less glycinin and 88.44% less β-conglycinin in SBM. A total of 192 piglets were assigned to receive either a diet of SBM with antibiotics (the control group) or a diet containing 10% FSBM without antibiotics. The average daily gain and feed intake of pigs fed FSBM were superior (p < .10) to those fed the control diet. Reduced (p < .05) mRNA expression of pro-inflammatory cytokines was detected in the jejunum and ileum of pigs fed FSBM. These results demonstrated that a diet containing BS12 FSBM improved growth performance by reducing dietary inflammation in piglets.
Highlights
Soybean meal (SBM) is the most widely used plant protein source in the food and feed industries
A Bacillus subtilis strain BS12 was selected through plate and fermentation experiment, which reduced 92.36% less glycinin and 88.44% less β-conglycinin in soybean meal (SBM)
These results demonstrated that a diet containing BS12 fermented soybean meal (FSBM) improved growth performance by reducing dietary inflammation in piglets
Summary
Soybean meal (SBM) is the most widely used plant protein source in the food and feed industries. Glycinin and β-conglycinin account for about 30% and 40%, respectively, of the total proteins in SBM (Maruyama et al, 1999). Soybean allergens (mainly glycinin and β-conglycinin) in the diets of weaned pigs provoked transient hypersensitivity and inflammation associated with abnormal morphology of the small intestine (Li et al, 1990; Sun, Li, Dong, Qiao, & Ma, 2008). These morphological changes can cause animal malabsorption syndrome, growth depression, and diarrhea (Sun, Li, Dong, et al, 2008; Sun, Li, Li, Dong, & Wang, 2008).
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