Abstract: Objective To understand the epidemic situation of soil?transmitted nematodiasis in the national surveillance site in Henan Province. Methods Over 1 000 fecal samples from inhabitants in Huaiyang County of Henan Province， which was a national surveillance site， were collected each year from 2006 to 2015， the eggs of soil?transmitted nematodes and other intestinal helminths were examined by Kato?Kats technique. The cellophane swab method was used to detect Enterobius vermicularis eggs in children aged 3 to 12 years. In addition， the soil samples were collected from vegetable fields， lavatories， courtyards and kitchens of 10 families randomly selected in each year to examine Ascaris eggs by a modified saturated sodium nitrate floatation method. Results From 2006 to 2015， 10 419 persons were investigated， and the eggs of five species of intestinal helminths， Ascaris lumbricoides， Trichuris trichiura， hookworm， E. vermicularis， and Trichostrongylus orientalis， were detected， The average infection rate of soil?transmitted nematodes in residents in Huaiyang County was 3.69%. The intensity of infection was mild and a family clustering was obvious. Both the infection rates of E. vermicularis in children and soil?transmitted nematodes in villagers had no significant differences between different genders （both P＞0.05）. The infection rates of soil?transmitted nematodes， A. lumbricoides and E. vermicularis all reached the highest in the age group of 1-10 years. For different education background， the people with primary school education had the highest infection rate， and the infection rate showed a decreasing trend with the increase of the educational level. The infection rate of soil?transmitted nematodes in the national surveillance site in Henan Province showed a decreasing trend from 2006 to 2015. Unfertilized and fertilized A. lumbricoides eggs were detected in the soil samples， but the positive rate was very low. Conclusions In the recent 10 years， the infection rate of soil?transmitted nematodes in the national surveillance site in Henan Province shows a decreasing trend and maintains at a low level. The infection shows a family clustering. The children， especially those aged 3-9 years are the main infected population， and E. vermicularis infection is the key point of prevention and control.

Key words: Soil?transmitted nematodiasis； Infection rate； Surveillance； Henan Province

摘要： 目的 了解河南省国家级监测点土源性线虫病的流行动态。方法 2006-2015年，每年在淮阳县国家级土源性线虫病监测点收集不少于1 000人份的粪便样本，采用改良加藤厚涂片法检查土源性线虫及其他肠道蠕虫卵，3～12周岁儿童加做透明胶纸肛拭法检查蛲虫卵。此外，每年随机抽取10户家庭，收集其菜地、厕所、庭院和厨房的土壤样本，用改良饱和硝酸钠漂浮法检测土壤蛔虫卵污染情况。结果 2006-2015年，共在淮阳县监测点调查10 419人，检出5种肠道蠕虫卵，分别为蛔虫、鞭虫、钩虫、蛲虫和东方毛圆线虫，人群土源性线虫平均感染率为3.69%，均为轻度感染且存在家庭聚集性。男性和女性土源性线虫感染率差异无统计学意义，男、女童蛲虫感染率差异无统计学意义（P均＞0.05）。1～10岁年龄组土源性线虫、蛔虫及蛲虫感染率均最高，其中3～9岁儿童为重点感染人群，蛲虫为主要感染虫种。小学文化程度人群土源性线虫感染率最高，感染率随文化程度升高呈递减趋势。10年来，河南省国家监测点土源性线虫感染率总体呈逐年下降趋势。监测点土壤中检出受精蛔虫卵和未受精蛔虫卵，但检出率很低。结论 近10年来河南省国家级监测点土源性线虫感染率呈逐年下降趋势且维持在较低水平，感染存在家庭聚集性。儿童尤其是3～9岁儿童为重点感染人群，蛲虫为重点防治虫种。

关键词: 土源性线虫病；感染率；监测；河南省