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目的 探讨通江河道水泥混凝土护坡工程控制血吸虫病流行的效果。方法 选择南京市栖霞区摄山镇七乡河为实验区 ,采用与护坡工程同步的前瞻性方法 ,观察工程前后实验区内各项血防指标的变化情况 ,并进行综合分析、评价。结果 工程后邻近村庄的人、畜粪检阳性率均下降了10 0 % ,河道内钉螺面积、有螺框出现率、钉螺平均密度和钉螺感染率分别下降了 76 .10 %、6 3.47%、5 0 .6 0 %和 10 0 % ;1997～ 2 0 0 0年河水小白鼠感染率下降了 95 .92 % ,阳性小鼠的平均虫荷分别为15 .2 0条、7.0 0条、1.33条和 1.0 0条 ,3年共在入江口捞到漂浮江滩钉螺 8只。结论 混凝土护坡工程血防效果明显 ,要巩固成果必须消灭支流河道钉螺并阻止长江血吸虫尾蚴的漂入
Objective To investigate the effect of controlling the prevalence of schistosomiasis in Tongjiang river concrete slope protection project. Methods The experiment was conducted in Qixiang River, Qishan Town, Qixia District, Nanjing. The prospective method was used to observe the changes of various blood-protection indexes in the experimental area before and after the project. The comprehensive analysis and evaluation were made. Results The positive rate of livestock manure in the nearby villages decreased by 100% after the project. The area of snails in the river, the occurrence of snails, the average density of snails and the infection rate of snails decreased by 76.10% and 6.307%, respectively. 50.0% and 100% respectively. The infection rate of river mice decreased 95.92% from 1997 to 2000. The average load of mice in the positive mice was 15.20, 7.00 and 1.33 Article and 1.0 0, 3 years, a total of fishing in the estuary snorkeling 8 snails. CONCLUSIONS: The blood-defensive effect of concrete slope protection works is obvious. In order to consolidate the achievements, it is necessary to eliminate the snail on the tributaries and prevent the cercariae from floating