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山东省1962年发现有华支事吸虫病流行，人群平均感染率为1.51％，最高村为30％，其感染高发年龄以6－10、11—15岁两个年龄组为最高，即儿童感染高于成人。因此，我省一直把15岁以下儿童作为该病防治工作的重点对象。但从近年来我们对原流行较重的33个县查治结果看，其流行、感
Shandong Province in 1962 found that there is endemic fluke worm epidemic, the average population infection rate was 1.51%, the highest village of 30% of the high incidence of infection in the age group of 6-10,11-15 years of age two highest, that is, children infected Above adult. Therefore, our province has been the children under 15 years as the focus of prevention and treatment of the disease. However, in recent years, we have seen the prevalence and sense of the results of the investigation and treatment of 33 counties where the original epidemic was relatively heavy