Effect of different dietary levels of protein, lysine, methionine and threonine on immune function in early weaned piglets

Hou YongQing; Guo YuMing; Zhou YuPing; Ji Cheng; Zhao JingYang

Chinese Journal of Animal Science 37(4): 18-20


Accession: 003726960

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Two experiments were conducted to study the effect of two protein levels and three lysine levels and two methionine levels and three threonine levels on the immune function of piglets. The early-weaned piglets at the ages of 25+or-3 d and 26+or-1 d and body weight of 6.78+or-0.08 kg and 6.68+or-0.04 kg were fed with a simple type diet. Measurements were made on the weight of immune organs, the quantity and component of blood lymphocytes, serum IgG titre, and skin-fold response to PHA (plant haemagglutinin). The skin test responded to protein level and lysine level (P<0.01). The different levels of methionine and threonine had a significant effect on serum IgG and SRBC (sheep red blood cell) antibody effectiveness (P<0.05), and the dietary levels of protein, lysine, methionine and threonine for maximal immune function were 18, 1.3, 0.9 and 0.68%, respectively.