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近 2 0年来湖南省共发现血吸虫病新流行区 2 2处 ,其中山区丘陵型 4处 ,江滩型 (以洲滩为单位 ) 1 0处 ,湖区丘陵型 8处 ,总面积约 3 6 0 0 hm2。现就其形成因素与分布特点报告如下。1 血吸虫病新流行区的形成因素1 .1 钉螺孳生 传播媒介钉螺的存在是构成血吸虫病新流行区的
In the recent 20 years, a total of 22 newly endemic areas of schistosomiasis were found in Hunan Province, including 4 hilly types in mountainous areas and 10 on riverbanks (in units of beaches), 8 in hilly areas of the lake with a total area of about 360 0 hm2. Now on its formation and distribution characteristics are as follows. Formation of a new endemic area of schistosomiasis 1.1 The presence of snail breeding media Snail is a new endemic area of schistosomiasis