异地钉螺杂交的后代对安徽的日本血吸虫的感受性

以安徽贵池县的日本血吸虫感染四川、福建、湖北、江西、江苏等省的钉螺在实验室繁殖的后代相互杂交产生的子_1、子_2和子_3代。结果表明,易被安徽的血吸虫感染的湖北、江西及江苏等省的钉螺杂交产生的子代也易被安徽的血吸虫感染。不易感或感受性弱的与易感染安徽的血吸虫的钉螺相互杂交产生的子代,有的仍不易感;有的可被感染,感染率有显著地提高,表明我国不同地区钉螺的感染率有地域差异。

THE SUSCEPTIBILITY OF HYBRID SNAILS OF ONCOMELANIA TO SCHISTOSOMA JAPONICUM FROM ANHUI PROVINCE

By exposing 15 sets of three generations of hybrid snails of Oncomelania to miracidia of Schistosoma japonicum originated from Guichi County of Anhui Province, and using snails from 6 relative areas as controls, it was found that three generations of hybrids of Fujian X Hu-bei, Fujian X Jiangsu, Jiangxi X Hubei, Jiangxi X Jiangsu, Hubei X Jiangsu and three generations of controls from Anhui, Hubei, Jiangxi and Jiangsu were susceptible to S. japonicum from Anhui. But 2 hybrid groups (Sichuan $$$$$$$$$$$$$$$ *************** Fujian &&&&&&&&&&&& and Sichuan $$$$$$$$$$$$$$$$ *************** Jiangsu &&&&&&&&&&&&) and three generations of controls from Sichuan and Fujian With the exception of F1 offspring remained uninfected.The results showed that the unsusceptible snails crossbread with susceptible ones such as Sichuan X Jiangxi, Fujian X Jiangxi, Fujian X Hubei and Fujian X Jiangsu, had became susceptible.