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采用原子吸收分光光度法对86例呼吸道感染患儿发中锌含量进行测定，结果表明：呼吸道感染患儿发锌含量均低于对照组，经统计学处理有显著性差异，P＜0．01，提示微量元素锌的缺乏可能是造成小儿机体免疫功能低下、易患感染性疾病的病因之一。
The content of zinc in children with respiratory tract infection was determined by atomic absorption spectrophotometry. The results showed that the content of zinc in children with respiratory tract infection was lower than that of the control group, and the difference was statistically significant (P <0.01) , Suggesting that the lack of trace elements zinc may be caused by immune dysfunction in children, susceptible to infectious diseases one of the causes.