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为了解沂蒙山区少年儿童的约虫病流行状况，我们于1990年采用加藤法和试管滤纸培养祛对沂蒙山区的临沂、都城、苍山、宫南4个县、市的12个乡、镇17村的1～14岁儿童进行调查。共检查2594名学生的粪便，加藤法检出钩虫感染者75例，其感染率为2．9％，试管滤织培养法检出钩虫感染?
In order to understand the prevalence of pygamm disease in children and adolescents in Yimeng Mountain, we used Kato method and test tube filter paper to cultivate and cure 12 counties, towns and villages of Linyi, Capital, Cangshan and Gongnan of Yimeng in 1990. Of children aged 1 to 14 years to investigate. A total of 2594 students were examined stool, Kato method detected hookworm infection in 75 cases, the infection rate was 2.9%, test tube filter culture hookworm infection?