摘要
采用调查村民接触各类有螺环境的时间、频次、接触强度计算出接触指数。用感染性钉螺分布、密度计算出感染螺指数,用综合法拟定易感环境的划级指数。根据上述三项指数确定易感环境和范围。结果显示,栽秧、打谷、修沟和户外洗涤是山丘型地区接触疫水的主要方式。人群接触疫水最多的环境是稻田和沟渠。各种地形易感环境划级指数均以沟渠较高,表明沟渠是山丘型地区威胁最大的易感环境。划级指数与感染螺指数显著相关,该两项指标都表明秋季感染明显高于春季。本文所采用的接触指数、感染螺指数和易感环境划级指数为山丘型地区调查感染螺分布数量、人畜暴露频次及各类环境的危险度提供了定量的认识,它为山丘型地区确定易感环境和范围提供了一种简便易行的方法。
Higher risk circumstances and limits were determined by 3 indices,i. e. contacting index cal- culated from exposuring time,intensity and frequency of villagers, infected snail index,and higher risk classification index calculated by comprehensive method. The results showed that transplant seedings, thresh and washing outdoor were the major modes of water contact patterns in mountainous regions. Paddy-field, especially irrigation ditch and canal which rated as higher classification index and the most dangerous areas to villagers were the circumstances with the highest frequency of water contact. There was significant correlation between classification index and infected snail index. The two indices indicated that the infection occured more frequent in autumn than that in spring. The three indices mentioned above provide a quantitative method for determining the limits of higher risk area of schistosomiasis in mountainous region.
出处
《寄生虫病与感染性疾病》
CAS
1993年第1期27-30,共4页
Parasitoses and Infectious Diseases
基金
全国血吸虫病专家咨询委员会资助
关键词
山丘型
血吸虫病
易感地带
Mountainous type
schistosomiasis
higher risk area
