Objective To understand the infection status and epidemic trend of soil-borne nematode infection from 2001 to 2010 in Chongqing City. Methods 21 points of 7 counties were selected in 2001 and 152 points of 38 counties were selected in 2010. The local population was investigated by the unity questionnaire. All eligible residents stool were collected and examined by the Kato-Katz technique. The Enterobius vermicularis egg of children lower 12 years was examined by the adhesive cellophane anal swab method. Results Etiological examination was conducted for 10 572 persons in 2001 and 77 981 people in 2010. Two investigations showed that there was a descending trend for the infection rate of soil-borne nematode, Ascaris, Hookworms, Trichuris and Pin-worm (P<0. 01). In 7 counties,there were a descending trend for the infection rate in 6 counties and an increasing trend in 1 county. The infection rate of soil-borne nematode was highest in 3-9 years group and lowest in over 60 years group in 2001 ,but the rate was highest in over 60 years group and lowest in 10-19 years group in 2010. With the increase of age, the rate showed a descending trend in 2001 (x2 = 14. 65 ,P<0. 01) and an increasing trend in 2010 (x2 =11. 90 ,P<0. 01). The infection rate was highest in illiteracy and lowest in college and above. With the increase of education, the rate showed a descending trend (x22001 =5. 87,x22010 = 10. 54 , P<0. 01). The first three types in the infection rate were respectively preschool children (4 3. 03%) , student (39. 16%) , farmer (30. 98%) in 2001,but the first three types in the infection rate were respectively farmer (16. 83%) ,student (11. 63%) ,and preschool children (11. 38%) in 2010. There was significant difference for the proportion of the number of infected kinds between 2001 and 2010 (v2pcarson = 1 137. 58,P<0. 01) ,but there was a descending trend for the number of infected kinds between 2001 and 2010 (x2CMH = 1 112. 88,P<0. 01). Conclusion The infection rate of soil-borne nematode showed a descending trend in Chongqing City. The infection rates of farmer,the aged,low education were higher.%目的 分析重庆市2001、2010年人群土源性线虫感染现状及流行趋势.方法 2001年选择了7个区县21个调查点,2010年选择了38个区县152个调查点,每个调查点不少于500名.采用的统一问卷调查人群的基本情况,包括年龄、性别、民族、文化程度、职业等,采用改良加藤厚涂片法查肠道蠕虫卵,透明胶纸肛拭法检查3～12周岁儿童蛲虫卵.采用SAS9.1.3统计软件对调查结果 进行分析.结果 2001年共调查10 572名,2010年共调查77 891名.2次调查蛔虫、钩虫、鞭虫、蛲虫及总感染率均呈下降趋势(P<0.01),7个区县中,6个感染率呈下降明显,1个呈上升趋势.2001年以3～9岁年龄组感染率最高,大于60岁年龄组最低,感染率随年龄增加呈下降趋势(χ2=14.65,P<0.01);而2010年以10～19岁年龄组感染率最低,大于60岁年龄组最高,感染率随年龄增加呈上升趋势(χ2=11.90,P<0.01).2次调查土源性线虫感染率均以文盲最高,大专及以上最低;文化程度越高,感染率越低(χ2趋势2001=5.87,χ2趋势2010=10.54,P<0.01).2001年土源性线虫感染率前3位分别是学龄前儿童(43.03%)、学生(39.16%)、农民(30.98%),2010年前3位分别是农民(16.83%)、学生(11.63%)、学龄前儿童(11.38%).2次调查的虫种构成比存在差异(χ2pearson=1 137.58,P<0.01),同时感染虫种数量有下降趋势(χ2CMH=1 112.88,P<0.01).结论 重庆市土源性线虫感染呈下降趋势,农民、老年人、文化程度低人群感染严重,应作为防治重点.
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