2006~2010年广西武鸣县土源性线虫病监测结果分析

Analysis on surveillance of soil-transmitted nematode infections in Wuming County of Guangxi from 2006 to 2010

目的掌握广西武鸣县土源性线虫感染流行规律，为制订土源性线虫病防治策略与效果评价提供科学依据。方法2006--2010年，采集武鸣县3周岁以上常住居民粪便标本，采用改良加藤厚涂片法检测土源性线虫卵；同时对3～12周岁儿童采用透明胶纸肛拭法检测蛲虫卵；采用饱和硝酸钠浮聚法检测土壤中的蛔虫卵，用直接镜检法判定蛔虫卵活力。结果2006--2010年，共检查居民5216人，其中男性2700人，女性2472人，各年土源性线虫感染率依次为4．09％、3．41％、1．44％、2．65％和1．14％，呈逐年下降趋势；感染者均为轻度感染；3～12岁儿童的蛲虫感染率依次为27．69％、17．36％、25．86％、23．76％和18．97％；检测50户家庭不同环境类型的土壤标本200份，发现蛔虫卵12份，其中2份蛔虫卵具有活力。结论广西武鸣县监测点土源性线虫病已处于低流行状态；但儿童蛲虫感染率仍较高，应加强对儿童土源性线虫感染的综合防治。

Objective To understand the prevalence of soil-transmitted nematode infections in Wnming county, and to provide the scientific evidence for establishing the control policy and evaluating the effectiveness of prevention. Methods From 2006 to 2010, fecal samples of the inhabitants of 3 years old and above were collected, the Kato-Katz＇s thick smears was used to detect the eggs of soil-transmitted nematode and cellophane tape was used to detect the eggs of pinworm for children aged between 3 and 12 years. Roundworm eggs in soil were tested by modified saturated sodium nitrate floatation method. The living abiliti of roundworm eggs was determined by light microscope. Results Totally 5 216 people were examined from 2006 to 2010, including 2 700 males and 2 472 females. The infection rates of soil-transmitted nematode were 4.09%, 3.41% , 1.44% , 2.65% and 1.14% respectively, with a trend of decreasing each year. In terms of infection intensity, all of the infection was light. And the pinworm infection rates of children aged between 3 and 12 years were 27.69% , 17.36% , 25.86% , 23.76% and 18.97% respectively during the five years. 200 soil samples collected from different environments were examined, roundworm egg was found in 12 samples, and 2 were alive. Conclusion The epidemic of soil-transmitted nematode had already stepped into the low infection stage at surveillance sites. However, the pinworm infection rate in children maintained at a high level. Therefore, it is very important to strengthen comprehensive prevention and control measures in children.