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对环江县的4个移民安置点、移民点周围2个环江当地居民点以及移民原籍的3个自然村进行流行病学调查，结果：疟原虫阳性率分别为5．98％（14／234）、0、4．00％（2／50），IFAT阳性率分别为1.74％（4／234）、0和0，疟史率：移民迁出前为6．41％（15／234），迁入后为42．74％（100／234），当地居民为5．63％（8／142），移民原籍居民为10．00％（5／50），并在移民点内捕获中华按蚊20只，推断为由移民输入传染源引起的疟疾局部流行。
Epidemiological investigation was carried out on 4 resettlement sites in Huanjiang County, 2 Huanjiang local settlements around the settlements and 3 natural villages of resettlers. The results showed that the positive rates of Plasmodium were 5.98% (14/234 ), 0,4.00% (2/50) respectively. The positive rates of IFAT were 1.74% (4/234), 0 and 0 respectively. The historical rates of malaria were 6.41% (15/234) 42.74% (100/234) after resettlement, 5.63% (8/142) of local residents and 10.00% (5/50) of permanent residents of immigrants, and captured Anopheles sinensis 20 were inferred as local malaria epidemics caused by immigrants’ input sources of infection.