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为探讨三峡库区湖北段不孳生钉螺的原因，采用类比和生态实验等方法进行研究。结果表明：三峡库区湖北段具有与血吸虫病疫区相似的气候、土壤和植被条件，其不孳生钉螺的原因，主要是由于山高坡陡且多溶洞、暗河造成的泥沙难以淤积，土壤干燥的地形地貌，以及该地区物流量小而形成的。
In order to investigate the reasons why snails do not breed in Hubei section of the Three Gorges Reservoir Area, the methods of analogy and ecological experiment were used to study. The results showed that the climate, soil and vegetation conditions in Hubei section of the Three Gorges Reservoir area were similar to those of schistosomiasis, and the reasons for not breeding snails were mainly due to the sediment caused by the steep and mostly caves in the mountainous and high slopes. The terrain and the small amount of logistics in the region formed.