扬子鳄是国家级一类保护动物,在扬子鳄保护区孳生着大面积血吸虫病中间宿主钉螺,而灭螺又是消灭血吸虫病重要环节。生物保护部门却严格禁止在保护区实施灭螺。因此保鳄与灭螺的矛盾严重制约着皖东南地区消灭血吸虫病目标的实现。本文试从扬子鳄与钉螺生物进化、地理分布、生态 Alligator sinensis is a kind of national level protected animal, which breeds a large area of ​​snail schistosomiasis in the Chinese alligator protected area, and snail killing is an important part of the elimination of schistosomiasis. Biological protection departments strictly prohibit the implementation of snail-killing in protected areas. Therefore, the contradiction between holding crocodile and molluscum severely restricted the goal of eliminating schistosomiasis in southeastern Anhui. This article tries to learn from the alligator and snail biological evolution, geographical distribution, ecology