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为发展农村经济,安庆地区1985年来将原来25处3838万m~2的围垦灭螺区改作养鱼或植芦。为观察其对血吸虫病疫情的影响,我们特选择其中4处,于1985年后进行了连续3年螺情与病情的追踪调查,报告如下。 1 枞阳县大窑圩 面积6410亩,1964年围垦前钉螺密度为4.6只/0.11m~2,居民感染率为30.4％(367/1207)。1968年建水闸并高围种植后,已连续9年查不到钉螺。1985至1988年改为鱼池养鱼后,一直无螺;居民感染率由0.7％(3/451)下降到零,且连续保持3年。
In order to develop the rural economy, Anqing Prefecture converted 25 original reclamation and snail areas of 38.38 million m 2 to fish culture or planting reeds in 1985. In order to observe its impact on the epidemic of schistosomiasis, we selected four of them and carried out a follow-up investigation of the snail and the condition for three consecutive years after 1985, and the report is as follows. 1 Zongyang County kilns Wei area 6410 acres, 1964 before the reclamation snail density 4.6 /0.11m ~ 2, the resident infection rate was 30.4% (367/1207). After the sluice was built in 1968 and surrounded by high-level vegetation, it has not been found for 9 consecutive years. After conversion to fishpond from 1985 to 1988, the fish remained non-loving. The rate of infection among residents dropped from 0.7% (3/451) to zero and remained unchanged for three years.