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首页> 外文期刊>Journal of Parasitology >PREREQUISITES FOR PARASITISM IN RHABDITID NEMATODES
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PREREQUISITES FOR PARASITISM IN RHABDITID NEMATODES

机译：拉比迪德线虫寄生虫的前提

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摘要

To evaluate their potential for survival in a vertebrate host, dauer larvae from 7 species of rhabditid nematodes were subjected to in vitro conditions designed to emulate those of a vertebrate digestive tract. Dauer larvae from 3 of the 7 species, selected for their ability to survive elevated temperatures and low pH, and representing differing types of phoretic associations with invertebrate hosts, were fed to frogs to examine their ability to survive passage through a vertebrate digestive system. The degree of invasiveness of the phoretic association that dauer larvae had with their invertebrate hosts did not correspond to patterns of in vitro survivorship for any of the experimental conditions. When consumed with a prey item, dauer larvae from all 3 species were recovered from frogs 72 hr postexposure, and no differences for in vivo survivorship were observed among the 3 species. The contention that invasiveness or facultative parasitism within an invertebrate host is a beneficial or necessary step toward vertebrate parasitism by rhabditid nematodes was not supported by the survivorship data.
机译：为了评估它们在脊椎动物宿主中存活的潜力，对来自7种大戟线虫的dauer幼虫进行了体外条件设计，以模拟脊椎动物消化道的条件。从7种物种中的3种中选出的Dauer幼虫被选为青蛙，以考验它们在脊椎动物消化系统中存活的能力，这些幼虫是根据它们在高温和低pH条件下的生存能力而选择的，它们代表了与无脊椎动物宿主不同类型的隐喻联想。道尔幼虫与其无脊椎动物宿主之间的隐喻关联的侵入性程度与任何实验条件下的体外存活模式均不对应。当与猎物一起食用时，暴露后72小时从青蛙中回收了所有3种动物的幼虫，并且在这3种动物中未观察到体内存活率的差异。存活数据不支持无脊椎动物宿主内的侵袭性或兼性寄生虫是向大戟线虫迈向脊椎动物寄生虫病的有益或必要步骤的论点。

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