“…Threonine is a major component of plasma immunoglobulins in animals and humans (79)(80)(81). Some studies (8,12,(82)(83)(84) with different animal species demonstrated that dietary threonine levels influenced plasma antibody concentrations and whole-body immune function. Furthermore, results of our research indicated that dietary threonine supplementation improved the intestinal morphology and specific immunological responses in the piglets challenged with E. coli K88 + (data no published).…”