Cooper L A, Larson S E, Lewis F A
Biomedical Research Institute, Rockville, Maryland 20852, USA.
J Parasitol. 1996 Jun;82(3):428-31.
Infection of Biomphalaria glabrata by Schistosoma mansoni results in a dramatic reduction in the snail's ability to produce eggs. We studied the ability of such parasitically castrated snails to fertilize the eggs of uninfected snails. Pigmented B. glabrata snails (13141 stock) were infected with S. mansoni miracidia and reared individually until they ceased laying eggs. These infected snails were then given the opportunity to mate with uninfected albino (NMRI) snails. Each of the infected snails was paired with a different albino partner each subsequent week. Sperm transfer by the infected snails was evident from the production of pigmented progeny by the uninfected albino snails. Infected snails successfully acted as males for up to 6 wk after parasitic castration had occurred. The duration of allosperm use by uninfected recipients was lengthy, regardless of the infection status of the pigmented sperm donor.
曼氏血吸虫感染光滑双脐螺会导致蜗牛产卵能力急剧下降。我们研究了这种被寄生虫阉割的蜗牛使未感染蜗牛的卵受精的能力。给有色素的光滑双脐螺（13141品系）感染曼氏血吸虫毛蚴，并单独饲养直至它们停止产卵。然后让这些受感染的蜗牛与未感染的白化（NMRI）蜗牛交配。从未感染的白化蜗牛产生有色素的后代可以明显看出受感染蜗牛的精子转移。在发生寄生虫阉割后，受感染的蜗牛成功地作为雄性长达6周。无论有色素的精子供体的感染状况如何，未感染的受体对异体精子的使用持续时间都很长。
