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在四川省５个片区共抽检１９６个点，９７１５９人，人芽囊原虫总感染率为８．０１％。不同特征的地形感染率有明显差异，性别、年龄分布上显示了女性感染高于男性，１５～２９岁年龄组为高发人群的分布特点，在不同民族、职业分布中以彝族和农民感染最高。应用二项分布拟合检验，对家庭成员感染人芽囊原虫的情况进行分析，其分布具有非常明显的家庭聚集性。
A total of 196 spots and 97,159 people were sampled in 5 districts in Sichuan Province. The total infection rate of Blastocystis hominis was 8.01%. Different characteristics of terrain infection rates were significantly different, the gender and age distribution showed that the female infection is higher than the male, 15 to 29 age group is the distribution characteristics of high incidence of population, in different ethnic and occupational distribution in Yi and peasants highest infection. The binomial distribution fitting test was applied to analyze the infection of human Blastocystis spp. In family members. The distribution of the family members showed a very obvious family aggregation.