钉螺阳性率及阳性螺密度的血吸虫病流行病学意义

DISCUSSION ON THE IMPLICATION OF INFECTED SNAIL RATE AND THE DENSITY OF INFECTED SNAILS IN SCHISTOSOMIASIS EPIDEMIOLOGY

通过现场调查并分析了钉螺阳性率及阳性螺密度两个指标在血吸虫病流行病学上的意义。认为钉螺阳性率与滩地污染程度呈正相关;钉螺阳性率与阳性螺密度间无相关性。说明钉螺阳性率是反映滩地污染程度的指标,而阳性螺密度则反映滩地的易感性,两者不能替代。

Through investigation of the distribution of infected snails in the field, we found that infected snail rate was positively ralated with the contamination index, but not related with the density of infected snails. The result indicated that the infected snail rate reflects the degree of contamination of wild dung, and that the infected snail density reflects the infectibility of the field.