BEHAVIORS IN TREMATODE CERCARIAE THAT ENHANCE PARASITE TRANSMISSION - PATTERNS AND PROCESSES
BEHAVIORS IN TREMATODE CERCARIAE THAT ENHANCE PARASITE TRANSMISSION - PATTERNS AND PROCESSES
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DOI：
10.1017/s0031182000085048
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发表时间：
1994-01-01
期刊：
影响因子：
2.4
通讯作者：
THERON, A
中科院分区：
文献类型：
--
作者：
COMBES, C;FOURNIER, A;THERON, A
尾蚴与毛蚴一样，是非寄生幼虫阶段，参与所有吸虫的生命周期，以实现宿主间的寄生虫传播。几乎所有尾蚴都在外部环境中自由生活。除了少数例外（Halipegidae 的尾蚴可以存活数月，Shostak & Esch, 1990a），尾蚴的活跃寿命很短，在此期间它们不进食，靠积累的储备生存。大多数尾蚴以囊蚴的形式包囊于第二中间宿主中，而第二中间宿主是最终宿主的猎物。在某些物种中，活跃生命的中断是通过外部环境中的包囊来实现的（或者在一些物种中是简单的不动等待策略）。在一些双宿主生命周期中，尾蚴侵入后发育成成虫（引起人类血吸虫病的各种物种都是这种情况）。有些尾蚴不会离开软体动物，然后必须被最终宿主摄入。
Cercariae, like miracidia, are non-parasitic larval stages implicated in the life cycle of all trematodes for the host-to-host parasite transmission. Almost all cercariae are free-living in the external environment. With a few exceptions (cercariae of Halipegus occidualis (Halipegidae) can live several months, Shostak & Esch, 1990a), cercariae have a short active life during which they do not feed, living on accumulated reserves. Most cercariae encyst as metacercariae in second intermediate hosts which are prey of the definitive host; in certain species, the interruption of the active life is achieved by an encystment in the external environment (or a simple immobile waiting strategy in a few species). In some two-host life cycles, the cercariae develop into adults after penetration (this is the case for various species causing human schistosomiasis). Some cercariae do not leave the mollusc which must then be ingested by the definitive host.