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一、改变环境的灭螺措施在局部地区结合农田水利建设灭螺,菲律宾根据1955～1959年在莱特的试点结果,制定了消灭日本血吸虫中间宿主四方钉螺的五年计划。试点经验证明,沼泽排水,清除河流及灌溉沟中的杂草可以控制钉螺;稻田的细犁深耙,秧苗行距适当,也可大大减少钉螺数量。一种有效的农业措施既能使钉螺密度下降95%,使10岁以下的儿童发病率从11.7%下降到7.0%,又能增加耕地面积和粮食收成。日本在局部地区结合治水,将钉螺埋入6厘米深处,钉螺即不能再爬出。经过修筑工事,平整地面,除去杂草,灌溉沟渠使用水泥修建后,钉螺密度明显降低。改变环境
First, to change the environment of snails measures In some areas combined with farmland water conservancy construction snails, the Philippines based on pilot results from 1955 to 1959 in Wright, the development of the Schistosoma japonicum intermediate host snail four-year plan. Experimental experience shows that swamp drainage, removal of weeds in the river and irrigation ditches can control snails; paddy plow deep rakes, row spacing appropriate, but also can greatly reduce the snail number. An effective agricultural measure will not only reduce the density of snails 95%, reduce the incidence of children under 10 from 11.7% to 7.0%, but also increase the area of cultivated land and grain yield. In some areas, Japan combined water control and buried the snails to a depth of 6 cm. The snails could no longer crawl out. After construction work, leveling the ground, removing weeds, construction of irrigation ditches using cement, snail density was significantly reduced. Change the environment