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为了解我县中小学生的蛔虫感染率情况，于1992年5月用改良加藤法对县城两所中小学校640名学生进行粪检。两所学校学生的蛔虫感染率为41.1％（263／640），中、小学生的感染率分别为45．2％（217／480）和28．8％（46／160），两者间有非常显著性差异（X2＝13．43，P＜0．01）．
In order to understand the primary and secondary school students in our county roundworm infection rates, in May 1992 with improved Kato law on the county two 640 primary and secondary schools for fecal examination. The infection rates of Ascaris in the two schools were 41.1% (263/640) and 45.2% (217/480) and 28.8% (46/160), respectively Significant difference (X2 = 13.43, P <0.01).