营养素不足已成为免疫低下的原因 ,蛋白能量 营养障碍尤其会影响到细胞免疫 ,造成胸腺萎缩、ＣＤ4 + Ｔ细胞减少 ,使麻疹、结核重症化。虽然血清免疫球蛋白值并未降低 ,但可见分泌型ＩｇＡ产生减少 ,部分抗体产生减少 ,虽中性粒细胞的游走功能、吞噬功能无变化 ,但杀菌能力亦降 Inadequate nutrients have become the cause of immunodeficiency, protein energy nutrition disorders, in particular, will affect the cellular immunity, causing thymus shrinkage, CD4 + T cell reduction, so that measles, tuberculosis severe. Although the serum immunoglobulin value did not decrease, but the secretion of secreted IgA reduced, some antibodies reduced, although neutrophil migration function, no change in phagocytic function, but also reduced bactericidal ability