Richards C S
J Parasitol. 1975 Apr;61(2):233-6.
Biomphalaria glabrata snails of known genetic susceptibility types were exposed to miracidia from 2 strains of Schistosoma mansoni differing in infectivity.. Individual snails were exposed to single miracidia and penetration observed. Snails of a genetic type susceptible to both parasite strains served as controls, while snails of a genetic type susceptible to one parasite strain but relatively refractory to the other served as test snails to demonstrate the difference in parasite infectivity. Cercariae from snails with single sex infection of each of the 2 parasite strains were injected into mice to provide crosses. Results of test snail exposures to F1 miracidia from reciprocal crosses suggested that the parasite strain difference in infectivity was genetic and involved sex linkage. Results also suggested that the female S. mansoni was heterogametic (XY), the male XX.
将已知遗传易感性类型的光滑双脐螺暴露于两种感染性不同的曼氏血吸虫菌株的毛蚴中。将单个螺暴露于单个毛蚴并观察其穿透情况。对两种寄生虫菌株均易感的遗传类型的螺作为对照，而对一种寄生虫菌株易感但对另一种相对难治的遗传类型的螺作为试验螺，以证明寄生虫感染性的差异。将来自两种寄生虫菌株单性感染螺的尾蚴注射到小鼠体内以进行杂交。试验螺暴露于正反交产生的F1毛蚴的结果表明，寄生虫菌株在感染性上的差异是遗传的且涉及性连锁。结果还表明，雌性曼氏血吸虫是异配性别（XY），雄性是XX。
