Seila Couso-Pérez, Alberto Gayoso, Elvira Ares-Mazás, Hipólito Gómez-Couso
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引用次数: 0
摘要
目的：褐鳟（Salmo trutta）感染棘头蚴寄生虫 Echinorhynchus truttae 的起因是摄食了寄生有囊蚴的甲壳类动物。据报道，浮游虾是这种寄生虫的常见中间宿主。西班牙的河流中没有这种鱼，这表明本地的伽马类可能是鲑鱼囊尾蚴的中间宿主，而鲑鱼囊尾蚴是西班牙报告的唯一一种鲑鱼囊尾蚴。本研究的目的是调查加利西亚河流中的本地伽马类物种是否可以作为鳟鱼棘头蚴的中间宿主：方法：从加利西亚的河流中采集了 263 个伽马类标本，用 70% 的乙醇固定。在体视显微镜下检查这些标本是否存在棘头蚴幼虫阶段：结果：在一个被确认为 Echinogammarus lusitanicus 的伽马类标本中，观察到了一条 Echinorhynchus truttae 的囊棘鱼：结论：在 E. lusitanicus 中发现 E. truttae 的囊棘鱼表明，在加利西亚，该物种在该寄生虫的生命周期中扮演着中间宿主的角色，而加利西亚缺乏 G. pulex（该寄生虫物种最常见的中间宿主）。
Echinogammarus lusitanicus (Amphipoda), a New Intermediate Host of Echinorhynchus truttae (Acanthocephala: Echinorhynchidae)
Purpose
The infection of brown trout (Salmo trutta) by the acanthocephalan parasite Echinorhynchus truttae is initiated by the ingestion of gammarid crustaceans harbouring the cystacanth form. Gammarus pulex has been reported as the common intermediate host of this parasite species. The absence of G. pulex in the rivers of Spain suggests that native gammarid species may play the role of intermediate host for E. truttae, which is the only acanthocephalan species reported in salmonids in this country. The aim of the present study was to investigate whether native gammarid species of Galician rivers can act as intermediate hosts of E. truttae.
Methods
A total of 263 gammarid specimens were collected from rivers in Galicia and fixed in 70% ethanol. They were examined under stereomicroscope for the presence of acanthocephalan larval stages.
Results
In one gammarid specimen identified as Echinogammarus lusitanicus, one cystacanth of Echinorhynchus truttae was observed.
Conclusion
The presence of a cystacanth of E. truttae in the gammarid E. lusitanicus indicates that this species play a role as an intermediate host in the life-cycle of this parasite in Galicia, where G. pulex (the most frequently reported intermediate host of this parasite species) is lacking.
期刊介绍：
Acta Parasitologica is an international journal covering the latest advances in the subject.
Acta Parasitologica publishes original papers on all aspects of parasitology and host-parasite relationships, including the latest discoveries in biochemical and molecular biology of parasites, their physiology, morphology, taxonomy and ecology, as well as original research papers on immunology, pathology, and epidemiology of parasitic diseases in the context of medical, veterinary and biological sciences. The journal also publishes short research notes, invited review articles, book reviews.
The journal was founded in 1953 as "Acta Parasitologica Polonica" by the Polish Parasitological Society and since 1954 has been published by W. Stefanski Institute of Parasitology of the Polish Academy of Sciences in Warsaw. Since 1992 in has appeared as Acta Parasitologica in four issues per year.
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