畜粪污染滩地对阳性钉螺分布的影响及其防制措施的效果

INFLUENCE OF LIVESTOCK DUNG IN MARSHLAND ON DISTRIBUTION OF INFECTED SNAILS AND THE EFFECT OF CONTROL MEASURES FOR SCHISTOSOMIASIS

本文应用多元线性回归方法,分析了滩地野粪污染程度及家畜活动频度对感染性钉螺分布的影响,并观察了滩地综合治理措施控制血吸虫病的效果.结果表明,阳性螺密度及钉螺感染率与滩地畜粪污染程度及家畜活动频度之间存在回归关系,通过滩地综合治理,滩地阳性螺密度、钉螺感染率及附近居民血吸虫感染率均得到明显控制,并取得了良好的经济效益.

After an analysis was made on the influence of livestock dung and livestock activity on the distribution of infected snails by using the method of multiple linear regression,and then the effect of schistosomiasis control by means of marshland harnessing,especially of estab-lishing safe pasture and sealing off the marshland was observed. The results showed that the regression coefficient between the mean density of infected snails and the snail infection rate as well as the mean density of livestock dung and the frequency of livestock activity was significant. After two years of land harnessing, the density of infected snails and the infection rate of snails as well as that of the inhabitants were obviously controlled and good economie results obtained.