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为查清２．８３万皮炎病人爆发流行的病因，采用整群随机抽样法进行调查，观察和比较不同人群皮炎罹患率的变化，揭示其流行特征。结果显示皮炎发病高峰与小米山茶场茶毛虫幼虫发生高峰相一致，离茶场距离越近皮炎罹患率越高，处于下风向的人群皮炎罹患率大于上风向，皮肤暴露程度高的人群皮炎罹患率高，上述差异均有显著性。表明此次爆发流行的皮炎为茶毛虫皮炎。
In order to find out the etiopathogenisis of 28,300 dermatitis outbreaks, a randomized cluster sampling method was used to investigate the prevalence of dermatitis in different populations and to reveal its epidemiological characteristics. The results showed that the peak incidence of dermatitis was consistent with the peak of the larvae of the tea caterpillar in Xiaomi Mountain Tea Plantation. The closer the distance to the tea plantation, the higher the incidence of dermatitis. The incidence of dermatitis in the leeward was higher than that in the upwind, and the incidence of dermatitis was high in those with high dermal exposure , The above differences were significant. That the outbreak of popular dermatitis tea caterpillar dermatitis.