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首页> 外文期刊>Journal of Parasitology >Internal movement of estuarine digenetic trematodes through their intermediate snail host Cerithidea californica.
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Internal movement of estuarine digenetic trematodes through their intermediate snail host Cerithidea californica.

机译：河口两生性吸虫通过中间蜗牛宿主 Cerithidea californica 的内部运动。

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摘要

The ability of free-swimming larval parasites to control emergence from their hosts can be critical in increasing the chances of successful infection transmission. For a group of estuarine trematodes, emergence of cercariae from their snail hosts is known to match favorable temperature, tidal activity, and light intensity. How the larvae time this behavior is not well understood, but the pathway that the larvae take through their host may play a role. Through video and histological analysis, we were able to identify the snail's anus as the emergence point and the peri-intestinal sinus dorsal to the intestines as the route by which they reach that point. By moving through this open sinus, the larvae have an energetically efficient pathway to reach their emergence point while minimizing damage to the host. Most importantly, it allows control over emergence to be maintained by the parasite, not the host, thus increasing the chances of the larva successfully reaching its intended destination.
机译：自由游动的幼虫寄生虫控制其宿主出现的能力对于增加成功传播感染的机会至关重要。对于一组河口吸虫，已知从它们的蜗牛宿主出来的尾c具有与有利的温度，潮汐活动和光强度相匹配的能力。幼虫如何对这种行为进行计时尚不清楚，但幼虫通过宿主传播的途径可能起作用。通过视频和组织学分析，我们能够识别出蜗牛的肛门是出处，而将肠道背侧的肠道周围窦确定为到达该点的途径。通过穿过这个开放的窦，幼虫具有能量有效的途径来达到它们的出现点，同时将对宿主的损害最小化。最重要的是，它可以控制寄生虫而不是宿主控制出苗，从而增加了幼虫成功到达其预定目的地的机会。

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