人体、动植物、及其微生物均需要一定数量的微量元素,以维持正常的新陈代谢。机体含铁、铜、锌总量减少,均可降低机体抵抗力,有利于细菌感染,感染后死亡率增高。微生物生长和繁殖也需要适宜浓度的铁、锌等微量元素。当微生物侵入机体后,为了抵御、抑制和杀灭微生物,中和微生物产生的毒素,机体往往通过种种内部机制,改变组织及体液内各种微 The human body, animals and plants, and their microorganisms all require a certain amount of trace elements to maintain normal metabolism. Body iron, copper, zinc reduce the total, can reduce the body’s resistance, is conducive to bacterial infection, increased mortality after infection. Microbial growth and reproduction also need appropriate concentrations of iron, zinc and other trace elements. When the microorganisms invade the body, in order to resist, inhibit and kill microorganisms, and toxins produced by microorganisms, the body often through a variety of internal mechanisms to change the tissue and body fluids within the various micro