血吸虫病是世界性寄生虫病。中国是世界上血吸虫病流行最为严重的国家之一,作为其的唯一中间宿主钉螺,从交配、产卵、孵出幼螺至发育为成螺及成螺的生存,出现螺框密度、生殖率、成活率、扩散迁移等生态学特征,都同血吸虫病的流行和扩散有着密切联系。钉螺的生态学涉及生长繁殖 Schistosomiasis is a worldwide parasitic disease. China is one of the countries with the most serious epidemic of schistosomiasis in the world. As its only intermediate host snail, from the mating, spawning and hatching young snails to the development of snail and snail survival, the snail box density, reproductive rate , Survival rate, diffusion and migration and other ecological characteristics are closely related to the prevalence and spread of schistosomiasis. Snail ecology involves growth and reproduction