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为探讨宋氏ｒ拟钉螺在传病上的意义，采用微量平面淀粉胶电脉法检测了采自浙江、四川两省的宋氏ｒ拟钉螺、拟钉螺及钉螺共５个螺群的２１种等位基因酶谱，并进行数值分类学处理，从分子生物学水平揭示３螺类的亲缘关系。结果共得到２４个位点，６７个等位基因；宋氏ｒ拟钉螺与钉螺的Ｎｅｉ氏遗传距离（Ｎｅｉ′ｓＤ）为０．７８；宋氏ｒ拟钉螺与拟钉螺的Ｎｅｉ′ｓＤ为１．０５；钉螺与拟钉螺的Ｎｅｉ′ｓＤ为１．４０。显示三者有较近的亲缘关系，宋氏ｒ拟钉螺与钉螺的关系更密切，提示宋氏ｒ拟钉螺有可能为血吸虫（包括动物血吸虫）的螺类宿主，且不排除有传播并殖吸虫的可能
In order to explore the significance of Song’s snail on the pathogeny, 21 kinds of five spirochaeta groups of Song’s r, Snail and Snail collected from Zhejiang and Sichuan provinces were detected by microplanin-starch gel electrophoresis. Allelic zymogram, and numerical taxonomy processing, from the level of molecular biology revealed three snails of the genetic relationship. Results A total of 24 loci and 67 alleles were obtained. Nei’s genetic distance (Nei’s) was 0.78 for N. simonii and S. japonicus, and Nei’s was 1 .05; Nei’sD of snails and snails were 1.40. The results showed that there was a close relationship between the relative value of S. japonicus and S. japonicus, suggesting that S. japonicus could be a helminth host for schistosomiasis (including S. japonicum), and that Paragonimus spp. Possible