He Y X, Guo Y H, Ni C H, Xia F, Liu H X, Yu Q F, Hu Y Q
Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai.
Southeast Asian J Trop Med Public Health. 1991 Jun;22(2):245-8.
Oncomelania hupensis from six localities were used for infection with different isolates of Schistosoma japonicum in the mainland of China, ie Anhui in the east, Hubei in the center, Guangxi in the south, Sichuan in the West, Yunnan in the southwest and Fujian in the southeast. Snails from Anhui and Hubei were readily infected with the local isolate of S. japonicum and cross infection also took place readily between the snails and the schistosomes from these two places. Snails from Sichuan and Yunnan were refractory to infection with schistosome isolates from Hubei and Anhui, but the isolates from Sichuan and Yunnan were able to develop in snails from Hubei and Anhui. Though the Guangxi isolate developed readily in both Anhui and Guangxi snails, the average precercarial period in the former was significantly longer than in the latter. None of the other snails from Sichuan, Yunnan and Fujian became infected. On the other hand, snails from Guangxi infected with Anhui parasites also had a longer precercarial period than that in Anhui snails. Snails from Fujian were readily infected with the isolates from Anhui and Yunnan. The present results suggest that there might be different geographic strains of S. japonicum and their Oncomelania snail hosts in the mainland of China.
在中国内地，用来自六个地区的湖北钉螺感染日本血吸虫的不同分离株，这六个地区分别是东部的安徽、中部的湖北、南部的广西、西部的四川、西南部的云南以及东南部的福建。安徽和湖北的钉螺很容易被当地的日本血吸虫分离株感染，并且这两个地方的钉螺与血吸虫之间也很容易发生交叉感染。四川和云南的钉螺对来自湖北和安徽的血吸虫分离株感染具有抗性，但来自四川和云南的分离株能够在湖北和安徽的钉螺体内发育。虽然广西的分离株能在安徽和广西的钉螺体内顺利发育，但在安徽钉螺体内的平均尾蚴前期明显长于在广西钉螺体内。来自四川、云南和福建的其他钉螺均未被感染。另一方面，感染安徽寄生虫的广西钉螺的尾蚴前期也比安徽钉螺的长。福建的钉螺很容易被来自安徽和云南的分离株感染。目前的结果表明，中国内地可能存在日本血吸虫及其湖北钉螺宿主的不同地理株。
