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为摸清河南省郏县中小学生肠道蠕虫感染情况，防治肠道蠕虫病提供科学依据，1992年9～11月由卫生防疫站统一组织用改良加藤法，对部分中小学生进行了调查。按排在1440份粪便标本中，查见肠道蠕虫者545例，其感染率为37.8％。男女学生的感染率分别为35．4％（298／843）和41．4
In order to find out the situation of intestinal worm infection in primary and secondary school students in Yixian County of Henan Province and provide a scientific basis for prevention and treatment of intestinal helminth disease, from September to November 1992, a unified organization of health and anti-epidemic station was used to improve the Kato method. Some primary and secondary students were investigated. According to the list of 1440 stool specimens, we found 545 intestinal worms, the infection rate was 37.8%. The prevalence of male and female students was 35.4% (298/843) and 41.4 respectively