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首页> 外文期刊>Polar biology >Morphometric, molecular and histopathologic description of hepatic infection by Orthosplanchnus arcticus (Trematoda: Digenea: Brachycladiidae) in ringed seals (Pusa hispida) from Northwest Greenland
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Morphometric, molecular and histopathologic description of hepatic infection by Orthosplanchnus arcticus (Trematoda: Digenea: Brachycladiidae) in ringed seals (Pusa hispida) from Northwest Greenland

机译：西北格陵兰岛环斑海豹（Pusa hispida）中的北极正畸形肝（肝畸形：双子纲：近臂生殖科）肝感染的形态学，分子学和组织病理学描述

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摘要

For the first time in 30 years of routine sampling under the Arctic Monitoring and Assessment Program, a parasite was found in the liver of ringed seals (Phoca hispida) collected near Qaanaaq (Thule), Northwest Greenland, in 2008 and 2014. Concerns regarding changes to parasite occurrence, possibly related to climate change and bioaccumulation of immunomodulating anthropogenic pollutants, spurred further investigations into parasite characterization, and implications for wildlife health and seal hunters. Microscopic, molecular, and morphometric analyses are presented herein. Of 40 seals, 6 (15%) were infected, and 5 of 6 of these seals had severe infections. The parasite was identified morphologically as Orthosplanchnus arcticus Odhner, 1905 (Trematoda; Digenea: Brachycladiidae). Macro- and microscopic pathologic study indicated mild-to-severe biliary hyperplasia associated, stasis associated, and fibrosis associated with trematode infections. Molecular analysis of the trematode confirmed its classification within the Brachycladiidae using sequencing and comparing Internal Transcribed Spacer-1, mitochondrial-NADH Dehydrogenase 3, 18S ribosomal DNA, and Cyclooxygenase-1 regions. This is the first ever report of O. arcticus in ringed seals from Qaanaaq and is one of the most northern records of this parasite. We found significant liver pathology in severely infected seals, but its effects on health of seals in this population are unknown. Host-specificity and the lifecycle of O. arcticus are unknown, but transmission may involve subsistence and commercially harvested Arctic fish species. Further work is needed to answer these questions. Surveying parasites in Arctic wildlife is important in order to assess potential effects on wildlife and human health (i.e., zoonoses).
机译：在“北极监测与评估计划”的30多年例行采样中，2008年和2014年首次在西北格陵兰岛Qaanaaq（Thule）附近采集的环状海豹（Phoca hispida）的肝脏中发现了一个寄生虫。寄生虫发生的变化，可能与气候变化和免疫调节性人为污染物的生物蓄积有关，促使人们进一步研究了寄生虫的特性，并对野生动植物的健康和海豹猎人产生了影响。本文介绍了微观，分子和形态分析。在40个海豹中，有6个（占15％）被感染，其中6个海豹中有5个受到严重感染。在形态上鉴定该寄生虫为Orthosplanchnus arcticus Odhner，1905年（Trematoda； Digenea：Brachycladiidae）。宏观和微观病理学研究表明，轻度至重度胆道增生相关，瘀滞相关，纤维化与吸虫感染有关。对吸虫的分子分析通过测序和比较内部转录的Spacer-1，线粒体-NADH脱氢酶3、18S核糖体DNA和Cyclooxygenase-1区域，证实了其在Brachycladiidae中的分类。这是卡阿纳克环斑海豹中O. arcticus的首次报道，也是该寄生虫最北部的记录之一。我们在重度感染的海豹中发现了明显的肝脏病理，但该人群对海豹健康的影响尚不清楚。寄主北极曲霉的寄主特异性和生命周期尚不清楚，但传播可能涉及生存和商业捕捞的北极鱼类。需要进一步的工作来回答这些问题。为了评估对野生生物和人类健康（即人畜共患病）的潜在影响，调查北极野生生物中的寄生虫非常重要。

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  • 来源
    《Polar biology》 |2018年第5期|1019-1025|共7页
  • 作者

    Andersen-Ranberg Emilie; Lehnert Kristina; Leifsson Pall S.; Dietz Rune; Andersen Steen; Siebert Ursula; Measures Lena; Sonne Christian;

  • 作者单位

    Univ Vet Med Hannover, Inst Terr & Aquat Wildlife Res, Werftstr 6, D-25761 Busum, Germany;

    Univ Vet Med Hannover, Inst Terr & Aquat Wildlife Res, Werftstr 6, D-25761 Busum, Germany;

    Univ Copenhagen, Fac Hlth & Med Sci, Dept Vet & Anim Sci, Ridebanevej 3, DK-1870 Frederiksberg, Denmark;

    Aarhus Univ, Fac Sci & Technol, Dept Biosci, ARC, Frederiksborgvej 399,POB 358, DK-4000 Roskilde, Denmark;

    Hunters Sci, Radmandsgade 55, DK-2200 Copenhagen N, Denmark;

    Univ Vet Med Hannover, Inst Terr & Aquat Wildlife Res, Werftstr 6, D-25761 Busum, Germany;

    Fisheries & Oceans Canada, Maurice Lamontagne Inst, 850 Route Mer, Mont Joli, PQ G5H 3Z4, Canada;

    Aarhus Univ, Fac Sci & Technol, Dept Biosci, ARC, Frederiksborgvej 399,POB 358, DK-4000 Roskilde, Denmark;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Trematoda; Molecular identification; PCR; Morphometrics; MT-ND3; Pinniped;

    机译：海生;分子鉴定;PCR;形态计量学;MT-ND3;Pinniped;

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