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在洲滩型血吸虫病流行区实施人畜扩大化疗结合健康教育防治策略后 ,进行了纵向观察。结果表明 :居民血吸虫感染率从实施前 ( 1 992年 )的 1 0 .39%降至实施结束时 ( 1 995年 )的 0 .96% ,而钉螺感染率和阳性螺密度则分别下降了 64.2 9%和 86.32 %。在对策中止实施 3年后 ,疫情出现回升 ,居民感染率升至 6.2 5% ,其中尤以 1 0～ 1 5岁年龄段升幅最大 ,男、女性感染率分别由 2 .82 %、1 .30 %升至 1 6.30 %和 1 1 .1 1 % ;钉螺感染率及阳性螺密度分别回升 2 4 0 .0 0 %和 92 8.85%。同时比较健教前后小学生疫水接触情况 ,结果显示健教减少了接触疫水频数 ,但其在对策中止 3年后出现上升。由此提出 :为巩固洲滩型流行区防治效果 ,在易感人群重点化疗的同时 ,应辅以易感地带局部灭螺 ,并保证儿童健康教育的连续性
In the endemic area of schistosoma japonicum, we conducted a longitudinal observation after implementing the strategy of prevention and treatment of enlarged human body and extended chemotherapy combined with health education. The results showed that the infection rate of Schistosoma japonicum decreased from 10.99% before implementation (from1992) to0.96% (from1995) at the end of implementation (while the infection rate and positive rate of snail decreased by 64.2% 9% and 86.32%. In the three years after the suspension of the measures, the epidemic picked up and the infection rate among residents rose to 6.25%, especially in the age group of 10 to 15 years. The prevalence of male and female infections increased from 2.82% and 1.30 % To 1 6.30% and 1 1 .1 1% respectively; the infection rate of snails and positive spiral density increased by 240.0% and 92.885% respectively. At the same time, we compared the water exposure of primary schoolchildren before and after the health education. The results showed that health education reduced the frequency of contact with water, but it rose after 3 years of suspension. Therefore, in order to consolidate the prevention and cure effect of the endemic area of Banzhou Island, we should supplement the local molluscicide in susceptible areas and ensure the continuity of children’s health education