Losev Alexander, Grybchuk-Ieremenko Anastasiia, Kostygov Alexei Yu, Lukeš Julius, Yurchenko Vyacheslav
Life Science Research Centre, Faculty of Science, University of Ostrava, Chittussiho 10, 710 00, Ostrava, Czech Republic.
Parasitol Res. 2015 Mar;114(3):1071-8. doi: 10.1007/s00436-014-4277-y. Epub 2014 Dec 30.
This work summarizes the results of the 8-year study focused on Trypanoplasma sp. parasitizing freshwater fishes in the vicinity of Kyiv, Ukraine. Out of 570 fish specimens of 2 different species analyzed, 440 individuals were found to be infected. The prevalence of infection ranged from 24 % in Abramis brama Linnaeus (freshwater bream) to 100 % in Cobitis taenia Linnaeus (spined loach). The level of parasitemia also varied between moderate in freshwater bream and very high in spined loach. Interestingly, no clinical manifestations of trypanoplasmosis were observed even in extremely heavily infected C. taenia. We hypothesize that different species may differ in evolutionary timing allowing for reciprocal adaptation of the members of the "host-parasite" system. Molecular analysis of the 18S rRNA sequences revealed that several specimens were simultaneously infected with at least two different trypanoplasm species. To the best of our knowledge, this is the first report of the mixed infection with fish trypanoplasms.
这项工作总结了一项为期8年的研究结果，该研究聚焦于寄生于乌克兰基辅附近淡水鱼体内的锥体虫属（Trypanoplasma sp.）。在分析的570个来自2个不同物种的鱼类标本中，发现440个个体受到感染。感染率从淡水鲷（Abramis brama Linnaeus）的24%到条纹鳅（Cobitis taenia Linnaeus）的100%不等。寄生虫血症水平在淡水鲷中为中等，在条纹鳅中则非常高。有趣的是，即使在感染极其严重的条纹鳅中也未观察到锥体虫病的临床表现。我们推测，不同物种在进化时间上可能存在差异，这使得“宿主 - 寄生虫”系统的成员能够相互适应。对18S rRNA序列的分子分析表明，几个标本同时感染了至少两种不同的锥体虫物种。据我们所知，这是鱼类锥体虫混合感染的首次报告。
