日本血吸虫分布在我国的台湾省和大陆,60年代以来经各学者的研究结果,认为台湾和大陆两地日本血吸虫肯定有地域株的区别,但大陆日本血吸虫是否再有地域株之分,尚不能肯定。鉴于中国幅员广大,各流行地区血吸虫有无种以下生物特异性差异,值得进一步研究。本文就不同水系分布和专区划分,选用四川的天全、肩山、西昌、德阳四地区血吸虫株 Schistosoma japonicum is distributed in Taiwan Province and mainland China. Since the 1960s, scholars have concluded that there is definitely a difference between the two strains of S. japonicum in Taiwan and mainland China. However, whether schistosoma japonicum is divided into geographical isolates or not sure. In view of the vast territory of China, the prevalence of schistosomiasis following species-specific biological differences, it is worth further study. In this paper, the distribution of different water systems and zoning, selection of Sichuan Tianquan, Shijingshan, Xichang, Deyang four areas schistosome strains