The proportions of T cells and CD4+ were increased (p<0.05) by average 9.3 and 36.9% respectively by the inclusion of ESBM, and there were no differences (p>0.05) in T cells and CD4+ among the three levels of dietary ESBM.
Indeed, weaned pigs fed ESBM showed better growth performance and immune function in this study.
In this study, the activity of trypsin inhibitor and urease in ESBM could not be detected.
Importantly, the content of small peptides significantly increased in ESBM in this study, and that small peptides that are able to be absorbed contribute to pigs' nutrition needs further study.
The improvement of ESBM in nutritional values reflected on the better growth performance of weaned pigs in this study.
The apparent faecal digestibility of CP and DE increased by ESBM in this study, but Dierick et al.
As expected, ESBM increased the relative weights of thymus and mandibular lymph nodes of weaned pigs in this study, indicating that the immune function of weaned pigs may be influenced by feeding ESBM.
The health status was further investigated by measuring the percentages of T lymphocytes and its subsets in the peripheral blood in this study, and ESBM showed an improvement in the proportions of T cells, CD4+ and CD8+ in this study.