Sorensen E, Ismail M, Amarasinghe D K, Hettiarachchi I, Dassenaieke T S
Department of Parasitology, Faculty of Medicine, University of Colombo.
Ceylon Med J. 1996 Jun;41(2):37-41.
To determine the prevalence of soil-transmitted nematode infections among children and to assess the magnitude of nematode infections among women in the reproductive age group.
Cross-sectional study.
14 government owned plantations in the up-country and low-country regions of Sri Lanka.
1614 children 3 to 12 years of age and 246 women 18 to 44 years selected using a multi-stage random sampling technique.
Egg count from stool samples collected from subjects using the quantitative Kato-Katz technique; percentage of children and women infected.
89.7% of the children and 86.2% of the women had at least one type of soil-transmitted nematode infection. Ascaris lumbricoides was the most common infection (77.0% of the children and 69.5% of the women). 69.4% of the children and 56.5% of the women had Trichuris trichiura infection and 23.2% of the children and 41.4% of the women had hookworm infection. Hookworm infection was much more common in the low country plantations.
The high prevalence rates reflect widespread faecal contamination of the environment in the plantations due to poor and congested housing conditions and insufficient sanitary facilities. As the physical environment is not likely to change in the short term, the strategy for control of soil-transmitted nematode infections should focus on regular deworming of children and health education. A control program based on these principles was initiated in the estate sector after this study was completed.
确定儿童中土源性线虫感染的患病率，并评估育龄妇女中线虫感染的程度。
横断面研究。
斯里兰卡高地和低地地区的14个国有种植园。
采用多阶段随机抽样技术选取1614名3至12岁儿童和246名18至44岁妇女。
采用定量加藤厚涂片法对研究对象粪便样本进行虫卵计数；儿童和妇女的感染率。
89.7%的儿童和86.2%的妇女至少感染一种土源性线虫。蛔虫是最常见的感染类型（77.0%的儿童和69.5%的妇女感染）。69.4%的儿童和56.5%的妇女感染鞭虫，23.2%的儿童和41.4%的妇女感染钩虫。钩虫感染在低地种植园更为常见。
高感染率反映出由于住房条件差且拥挤以及卫生设施不足，种植园环境中存在广泛的粪便污染。由于短期内物理环境不太可能改变，控制土源性线虫感染的策略应侧重于儿童定期驱虫和健康教育。本研究完成后，在种植园部门启动了基于这些原则的控制项目。
