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目的评估干预措施在桃源血吸虫病新流行区所取得的效果和效益。方法比较干预措施前后和干预措施期间试点居民和耕牛血吸虫病情指标、钉螺密度及钉螺感染性指标的差异,对比干预措施的成本和产生的效益。结果两年的干预措施使居民血吸虫病感染率由1998年12.61％下降到2000年的0.14％,同期家畜感染率也由15.91％下降到1.35％。活螺框出现率下降幅度为93％,活螺密度下降幅度99％,感染螺消失。干预措施成本效益比为1:1.76。结论在地理位置较封闭,流行因素较简单的山丘性血吸虫病新流行区,可以通过强化的综合性干预措施控制血吸虫病的流行,干预措施的投人在经济上也是合算的。
Objective To evaluate the effectiveness and benefits of interventions in the new epidemic area of schistosomiasis in Taoyuan. Methods The differences in disease index, snail density and oncomelania infection index of pilot residents and cattle during and after the interventions were compared, and the costs and benefits of the interventions were compared. Results The two-year intervention decreased the infection rate of schistosomiasis in residents from 12.61% in 1998 to 0.14% in 2000, while the infection rate of domestic animals dropped from 15.91% to 1.35% in the same period. The occurrence rate of live screw frame decreased by 93%, the live spiral density decreased by 99%, the infection spiral disappeared. The cost-benefit ratio of interventions is 1: 1.76. Conclusion In the new endemic area of hill schistosomiasis, which is more closed in geography and with simple epidemic factors, the prevalence of schistosomiasis can be controlled through intensive comprehensive interventions. The cost of interventions is also economically justified.