论文部分内容阅读
目的 研究三峡成库后生态环境变化对血吸虫病流行的影响 ,为制定防治方案提供科学依据。方法 在三峡库区中段和尾端 160m和 180m水位高程 ,模拟成库后灌溉区和淤积区类似条件 ,投放湖北肋壳钉螺和四川光壳钉螺 ,观察其生长繁殖 1年 ;用间接凝血试验 (IHA)抽样筛查来往于疫区流动人群中潜在传染源 ,粪便检查血吸虫卵 ;了解耕牛等生畜引进情况 ;调查重庆市历史疫情报告和当地医院诊断的血吸虫病病例 ;调查影响钉螺输入的因素。结果 肋壳钉螺和光壳钉螺成活率仅少数月份在 5 0 %以下 ,多数月份在 80 %左右 ,各实验区发现钉螺交配数量较少 ,相对以 3 -6月为多 ,同时发现活幼螺 ;来往疫区流动人员血清抗体检查 15 7人 ,未发现阳性 ,发现 1例正在治疗的病例 (血清抗体和病原学检查阴性 ) ;1989-2 0 0 3年 ,发现有记载的输入性血吸虫病例 9例 ;血吸虫病区有大量造纸原料和花草树木进入库区。结论 三峡成库后 ,生态环境发生变化 ,存在血吸虫病流行的潜在性危险。
Objective To study the impact of changes of ecological environment on the prevalence of schistosomiasis in the Three Gorges Reservoir, and provide a scientific basis for the formulation of prevention and treatment plans. Methods The water level of 160m and 180m in the middle and the end of the Three Gorges Reservoir Area was simulated. After simulating the similar conditions in the irrigated and silted areas after the reservoir was established, IHA sampling sampling of potential sources of infection in the floating population from the epidemic area, fecal examination of schistosome eggs; understanding of introduction of cattle and other livestock; investigation of historical reports of Chongqing City and the local hospital diagnosis of schistosomiasis cases; investigate the impact of snail input factor. Results The surviving rates of snail ribbed shell and light shell snail were only less than 50% in most months and about 80% in most months. In the experimental area, the number of mating snail was less than that in 3-6 months, and the live snail was found at the same time. A total of 15 7 people were tested positive for antibodies against the migrants in the epidemic areas. One case was found to be negative (serum antibody and pathogen test were negative). In 1989-230, cases of imported schistosomiasis were found Cases; schistosomiasis ward a large number of paper materials and flowers and trees into the reservoir area. Conclusion After the Three Gorges Reservoir into the reservoir, the ecological environment changes and there is a potential danger of the epidemic of schistosomiasis.