Wei-Qi Chen, Ya-Lan Zhang, Su-Hua Li, Yan Deng, Bian-Li Xu, Hong-Wei Zhang
Henan Center for Disease Control and Prevention, Zhengzhou 450016, China.
Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi. 2017 Jul 27;29(5):583-586. doi: 10.16250/j.32.1374.2017074.
To understand the epidemic situation of soil-transmitted nematodiasis in the national surveillance site in Henan Province.
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 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 eggs by a modified saturated sodium nitrate floatation method.
From 2006 to 2015, 10 419 persons were investigated, and the eggs of five species of intestinal helminths, , , hookworm, , and , 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 in children and soil-transmitted nematodes in villagers had no significant differences between different genders (both ＞0.05). The infection rates of soil-transmitted nematodes, and all reached the highest in the age group of 1-10 years. For different education back-ground, 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 eggs were detected in the soil samples, but the positive rate was very low.
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 infection is the key point of prevention and control.
了解河南省国家监测点土源性线虫病的流行状况。
2006年至2015年，每年采集河南省淮阳县（国家监测点）1 000余名居民的粪便样本，采用改良加藤厚涂片法检查土源性线虫及其他肠道蠕虫虫卵。采用透明胶纸肛拭法检测3至12岁儿童虫卵。此外，每年随机抽取10户家庭的菜地、厕所、庭院及厨房土壤样本，采用改良饱和硝酸钠漂浮法检查虫卵。
2006年至2015年，共调查10 419人，检出蛔虫、鞭虫、钩虫、蛲虫和粪类圆线虫5种肠道蠕虫虫卵，淮阳县居民土源性线虫平均感染率为3.69%。感染程度较轻，家庭聚集性明显。儿童蛔虫感染率和村民土源性线虫感染率在不同性别间差异均无统计学意义（均P＞0.05）。土源性线虫、蛔虫和鞭虫感染率均在1至10岁年龄组最高。不同文化程度中，小学文化程度人群感染率最高，且感染率随文化程度升高呈下降趋势。2006年至2015年，河南省国家监测点土源性线虫感染率呈下降趋势。土壤样本中检出受精蛔虫卵和未受精蛔虫卵，但阳性率很低。
近10年，河南省国家监测点土源性线虫感染率呈下降趋势并维持在较低水平。感染呈现家庭聚集性。儿童尤其是3至9岁儿童为主要感染人群，蛔虫感染是防控重点。
