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对６５例呼吸道感染易感儿与４５例正常健康儿血清锌值的测定，发现易感儿血清锌值明显偏低，其值为６．８１±２．０１μｍｏｌ／Ｌ，与健康儿比较，ｔ＝３．０６，Ｐ＜０．０１，有非常显著差异，说明易感儿存在着缺锌。易感组中１～３岁组锌值偏低较明显（Ｐ＜０．０５），其易感性较高；用锌剂治疗１８例重症易感儿，治疗后血锌值上升，易感性下降，与治疗前差异较大（Ｐ＜０．０１）。说明锌水平与呼吸道免疫功能密切相关，锌剂可以防治呼吸道感染，应注意易感儿血清锌值的改变
In 65 cases of susceptible children with respiratory tract infection and 45 cases of normal healthy children serum zinc values were found in susceptible children serum zinc value was significantly lower, the value of 6.81 ± 2.01μmol / L, compared with healthy children, t = 3.06, P <0.01, there is a very significant difference, indicating that there is a zinc deficiency in susceptible children. In the susceptible group, the values of zinc in 1 to 3 years old group were lower (P <0.05), and their susceptibility was higher. Treatment of 18 cases of severe susceptible children with zinc agent increased the blood zinc value and decreased the susceptibility , Which was significantly different from that before treatment (P <0.01). Zinc levels and respiratory tract immune function is closely related to zinc can prevent respiratory infections, should pay attention to susceptible children serum zinc value changes