Fryer S E, Probert A J
School of Animal Biology, University College of North Wales, Bangor, Gwynedd.
J Helminthol. 1988 Jun;62(2):133-40. doi: 10.1017/s0022149x00011378.
The daily cercarial output of two Nigerian strains of Schistosoma haematobium in sympatric Bulinus truncatus, B. globosus and B. senegalensis was measured at weekly intervals from the start of emission to the snails' death. In all cases cercariae were released throughout the life of the host, with no cases of "self cure". Patterns of output through the course of infections in B. truncatus and B. senegalensis were similar to those reported for S. haematobium by other workers, with daily production of cercariae rising to a peak within a few weeks of the onset of shedding, then declining until the host's death. In the longer lived B. globosus production was significantly higher, but declined to very low levels after the initial peak; in some individuals cercarial output remained very low, while others showed a second period of high cercarial emission. The relative compatibility of each host-parasite combination is discussed.
从尾蚴排放开始到钉螺死亡，每周对来自尼日利亚的两种埃及血吸虫菌株在同域分布的截形泡螺、球形泡螺和塞内加尔泡螺中的每日尾蚴产出量进行测量。在所有情况下，尾蚴在宿主的整个生命周期内都会释放，没有出现“自愈”的情况。截形泡螺和塞内加尔泡螺在感染过程中的产出模式与其他研究人员报道的埃及血吸虫的模式相似，尾蚴的日产量在开始排放后的几周内升至峰值，然后下降直至宿主死亡。在寿命较长的球形泡螺中，产量明显更高，但在初始峰值后降至非常低的水平；在一些个体中，尾蚴产出量一直很低，而其他个体则出现了第二个高尾蚴排放期。讨论了每种宿主 - 寄生虫组合的相对相容性。
