Abstract: Objective　To investigate the related factors of soil?transmitted nematode infections in Chongqing City, so as to provide the basis for scientific prevention and treatment of the infections. Methods　From 2011 to 2015, the stool samples of residents of the surveillance sites in Chongqing City were collected every year, and the soil?transmitted nematode eggs were examined by the modified Kato?Katz thick smear method (three smears for a single stool sample). The respondents were surveyed by questionnaires, and the factors affecting soil?transmitted nematode infections were identified. Results　The prevalence of human soil?transmitted nematode infections were 6.44%, 7.30%, 6.85%, 6.93% and 5.56% in Chongqing City from 2011 to 2015, respectively. The more unclean drinking water and the lower frequency of washing hands after using the toilet were the risk factors for Ascaris lumbricoides infection. The more harmless toilets, the higher level of fertilizer application, the lower frequency of drinking raw water, and the lower frequency of food without washing were the protective factors for A. lumbricoides infection. Conclusions　The local soil?transmitted nematode infections are at a low epidemic level in Chongqing City, and it is necessary to adhere to the classified guidance, comprehensive prevention and further monitoring on the basis of health education, water and toilet improvement, and environmental sanitation improvement in order to consolidate the prevention and control achievements.

Key words: Soil?transmitted nematodiasis, Influencing factor, Chongqing City

摘要： 目的　探索重庆市土源性线虫感染相关因素，为土源性线虫病科学防治提供依据。方法　2011–2015年每年在重庆市设立监测点，采集监测点居民粪便采用改良加藤厚涂片法（1粪3检）检查土源性线虫虫卵；对调查对象进行问卷调查，分析影响人体土源性线虫感染的相关因素。结果　2011–2015年重庆市人体土源性线虫感染率分别为6.44%、7.30%、6.85%、6.93%和5.56%；饮用水源不干净、便后洗手频率低是蛔虫感染的危险因素，厕所经过无害化处理、肥料无害化程度高、喝生水频率低、落地食物不洗就食频率低是蛔虫感染的保护因素。结论　重庆市人体土源性线虫病已处于较低流行水平；要巩固已取得的防治成果，还要在健康教育、改水改厕和改善环境卫生的基础上，坚持分类指导、综合防治，进一步做好监测工作。

关键词: 土源性线虫病, 影响因素, 重庆市