Abstract: Objective To understand the infection status of soil?transmitted nematodes in southwest China and the correla? tion between soil?transmitted nematode infections and children’ s growth. Methods The prevalence of soil?transmitted nematode infections was determined by Kato?Katz technique，and in part of the children，the examination of Enterobius vermicularis eggs was performed by using the cellophane swab method. The influencing factors were surveyed by using a standardized questionnaire. The relationship between soil?transmitted nematode infections and children’ s growth was analyzed by the ordinary least square（OLS） method. Results A total of 1 707 children were examined，with a soil?transmitted nematode infection rate of 22.2%. The results of OLS analysis showed that there existed the negative correlation between soil?transmitted nematode infections and the indexes of children’ s growth including BMI，the weight?for?age Z score and height?for?age Z score. Furthermore，other correlated variables included the age，gender，educational level of mother and raising livestock and poultry，etc. Conclusions Children’ s retarda? tion is still a serious issue in the southwest poor areas of China and correlated with the infections of soil?transmitted nematodes. For improving children’ s growth，it is greatly significant to enhance the deworming and health education about parasitic diseases in mothers.

Key words: Soil-transmitted nematodes；Child；Growth； Ordinary least square（OLS）

摘要：

目的 了解中国西南贫困地区儿童土源性线虫感染现状， 分析其对儿童生长发育的影响。方法 在四川省和贵州省随机选取3个国家级贫困县， 采用改良加藤厚涂片法对受检儿童粪便进行病原学检查并进行问卷调查。采用普通最小二乘法 （OLS） 分析土源性线虫感染情况、 个体特征、 饮食卫生习惯和家庭特征等相关因素对儿童身体质量指数 （BMI）、 身高和体重的影响。结果 共粪检1 707名儿童， 土源性线虫感染率为22.2%。OLS分析显示感染土源性线虫、 性别、 年龄、母亲受教育程度、 饮用生水、 饲养畜禽等6个因素差异均有统计学意义， 并与儿童身高和体重存在负相关关系。结论 中国西南农村贫困地区儿童感染土源性线虫与生长发育存在负相关关系。土源性线虫感染与母亲的文化程度密切相关。应加大力度控制儿童土源性线虫的感染。

关键词: 土源性线虫； 儿童； 生长发育；OLS估计