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首页> 外文期刊>Journal of Parasitology >VIRULENCE OF CORYNOSOMA CONSTRICTUM (ACANTHOCEPHALA: POLYMORPHIDAE) IN HYALELLA AZTECA (AMPHIPODA) THROUGHOUT PARASITE ONTOGENY
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VIRULENCE OF CORYNOSOMA CONSTRICTUM (ACANTHOCEPHALA: POLYMORPHIDAE) IN HYALELLA AZTECA (AMPHIPODA) THROUGHOUT PARASITE ONTOGENY

机译：整个寄生虫发生后，透明藻在斑节菌中的毒力（棘轮虫：多形纲）

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摘要

Development and growth of parasites depend on resources provided by the host and the parasite's ability to use them. Identifying specific costs incurred by the host provides insight for assessment of parasite energy budgets, which differ among taxa and ontogenetic stages. Data from this study were analyzed using an accelerated failure-time model with intensity as a covariate. Results indicated significantly reduced survival of amphipods, Hyalella azteca, infected with the acanthocephalan Corynosoma constrictum compared with uninfected controls. Male and female amphipod survivorship and infection intensity did not differ; however, amphipods with high-intensity infections (>16 larvae) died earlier compared with amphipods with low-intensity infections (<3 larvae). The majority of infected amphipods died between 12 and 24 days postexposure, a period of rapid larval development. It is hypothesized that host death may be due either to an increase in overall larval nutritional demands or to parasite-mediated depletion of a specific host substance. Results from this study suggest that developing C. constrictum satisfies energy requirements by depriving amphipod hosts of resources normally used for somatic growth and maintenance.
机译：寄生虫的发展和增长取决于宿主提供的资源以及寄生虫使用它们的能力。鉴定宿主产生的特定成本可为评估寄生虫能量预算提供见解，这些寄生虫能量预算在分类单元和个体发育阶段之间有所不同。使用强度为协变量的加速故障时间模型分析了本研究的数据。结果表明，与未感染的对照组相比，感染了棘头动物缩窄性锥虫的两足纲动物透明质酸的存活率明显降低。男女两栖类动物的存活和感染强度没有差异；然而，与低强度感染（<3个幼虫）相比，高强度感染的两栖类（比16个幼虫）更早死亡。大多数受感染的两栖类动物在接触后的12到24天之间死亡，这是一个快速的幼体发育时期。据推测，宿主死亡可能是由于幼虫总体营养需求的增加或寄生虫介导的特定宿主物质的消耗所致。这项研究的结果表明，通过收缩两栖动物宿主通常用于体细胞生长和维持的资源，发展鸡爪草可以满足能源需求。

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