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应用PHA皮试对污染区10～11岁健康学龄儿童进行为期三年的追踪对比调查。结果是:三年PHA皮试红斑直径大小比较,其反应强度逐年减少;污染区儿童PHA皮试反应强度明显低于对照区儿童反应强度,同时随着接触污染区时间的增加,二组反应强度差异越明显。这提示污染区儿童的非特异性免疫功能逐年下降,大气污染对儿童非特异性免疫功能影响程度逐年增加。并就PHA皮试在环境污染调查中使用价值,如何选择调查对象,以及PHA皮试本身存在不足之处问题进行了探讨。
Application of PHA skin test on contaminated areas of 10 to 11-year-old healthy school-age children for a three-year follow-up survey. The results are: three-year PHA skin test erythema size comparison, the intensity of the decrease year by year; contaminated area PHA skin test reaction intensity was significantly lower than the control area of children’s reaction intensity, and contact with the contaminated area time increases, the two groups of reaction intensity The difference is more obvious. This suggests that the non-specific immune function of children in the contaminated area declines year by year, and the influence of air pollution on the non-specific immune function of children increases year by year. And the PHA skin test in the use of environmental pollution survey value, how to choose the object of investigation, as well as PHA skin test itself shortcomings are discussed.