[目的 ]调查福建省并殖吸虫第 1中间宿主淡水螺的种类、地理分布和感染率。[方法 ]捕捉各地淡水螺类 ,检查其所携带不同虫种的并殖吸虫尾蚴感染率。[结果 ]在 2 5个县中 ,发现全省有 6种淡水螺类可充当并殖吸虫第 1中间宿主 ,即放逸短沟蜷、湖北钉螺闽亚种、福建拟钉螺、建瓯洱海螺、小桥拟钉螺和新店拟钉螺 ,其感染率 ( % )分别为 0 2 6、0 5 3、0 15、0 49、0 15和 6 5 7;放逸短沟蜷分布较广。[结论 ]放逸短沟蜷为传播并殖吸虫的优势种 [Objective] The research aimed to investigate the species, geographical distribution and infection rate of the first intermediate host Pax Pach in Fujian Province. [Method] Freshwater snails were collected from all over the country to examine their infection rates of Paragonimus cercariae with different species of insects. [Result] In 25 counties, 6 species of freshwater snails were found in the province to act as the first intermediate host of Paragonimus, ie, , The small bridge snail snail and the new shop snail, the infection rate (%) were 0 2 6,0 5 3,0 15,0 49,0 15 and 6 5 7; [Conclusion] The drainage ditch curled the dominant species of Paragonimus