论文部分内容阅读
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。
The contact index was calculated by investigating the time, frequency and contact intensity of villagers exposed to various types of snails. Infectious snail distribution, density calculated index of infection spiral, with a comprehensive method to develop susceptible to environmental demarcation index. According to the above three indicators to determine the susceptible environment and scope. The results showed that seedling planting, threshing, furrow repair and outdoor washing were the main ways of contact with water in hillside area. The population exposed to the most polluted water is rice fields and ditches. The high ditches of various sensitive topographical indicators of the terrain indicate that ditches are the most threatening and vulnerable environment in the hilly area. The grading index was significantly correlated with the infection index, both of which indicated that infection in autumn was significantly higher than in spring. The contact index, index of infection and index of susceptible environment in this paper provide a quantitative understanding of the distribution of the number of snails infected in the hills, the frequency of exposure to livestock and livestock and the risk of various environments. Identifying susceptible environments and ranges provides a simple and easy way to do this.