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在洞庭湖区血吸虫病严重流行区,采用选择性群体化疗、选择性群体化疗加易感地带药物灭螺和单纯治疗粪检阳性对象3种对策,3年后居民患病率分别下降为62.9％、59.2％和14.1％。水上流动渔船民采用群体化疗,血吸虫病患病率仅下降41.5％。家畜群体化疗组,感染率下降77.6％,只治粪检阳性组化疗前后感染率无变化。3种对策实际污染指数下降分别为74.7％、84.6％和36.2％。前2种对策虽下降幅度比较大,但都未达到阻断传播的阈值,感染螺密度和哨鼠感染率均维持在较高水平。
In the endemic areas of schistosomiasis in the Dongting Lake area, three kinds of countermeasures were adopted, such as selective group chemotherapy, selective group chemotherapy plus predisposing drug snail control and simple treatment of stool positive samples. The prevalence of residents after 3 years decreased to 62.9% 59.2% and 14.1%. The prevalence of schistosomiasis in water-migrating fishing boat population was only reduced by 41.5% using group chemotherapy. In the livestock group chemotherapy group, the infection rate decreased by 77.6%. Only the infection-positive rate in the stool-positive group was unchanged. The actual pollution index of the three measures decreased by 74.7%, 84.6% and 36.2% respectively. Although the former two kinds of countermeasures dropped by a relatively large extent, they all failed to reach the threshold of blockage transmission, and the infection spiral density and the infection rate of sentinel mice remained at a relatively high level.