Renal myxosporidiosis by an unknown Bivalvulidan myxozoan parasite in Murray River turtles (Emydura macquarii) in Australia

IF 2 3区医学 Q3 ECOLOGY

International Journal for Parasitology-Parasites and Wildlife Pub Date : 2025-03-26 DOI:10.1016/j.ijppaw.2025.101061

Zachary Low , Telleasha L. Greay , Swaid Abdullah , Phoebe A. Chapman , Viviana Gonzalez-Astudillo

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Abstract

This case series provides the first published record of a myxozoan parasite in Murray River turtles (Emydura macquarii) in Australia. Thirteen turtles were captured for an eco-toxicology study and underwent postmortem examinations. From these, three were found to have interstitial nephritis and spores within the affected renal tubules. Molecular characterisation was performed with PCR which yielded positive results for myxozoan DNA in the three infected samples. DNA sequencing and phylogenetic analysis of 18S rRNA sequences positioned the unknown species in a distinct clade, closely related to, but separate from, histozoic clades II and III. This discovery contributes significantly to the understanding of myxozoan diversity and ecology, highlighting a potential new threat to the health of Murray River turtle populations and possibly other aquatic reptiles. The discovery of this myxozoan species not only broadens the known host range of myxozoans but also raises concerns about the conservation of affected turtle populations due to its possible pathogenic nature.

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澳大利亚墨累河海龟（Emydura macquarii）肾脏肌孢子虫病由一种未知的双壳类肌孢子虫寄生虫引起

本系列病例首次公开记录了澳大利亚墨累河海龟（Emydura macquarii）体内的一种粘虫寄生虫。在一项生态毒理学研究中捕获了 13 只海龟，并对它们进行了尸检。其中三只龟被发现患有间质性肾炎，受影响的肾小管内有孢子。通过聚合酶链反应（PCR）进行了分子鉴定，结果显示这三个受感染样本中的肌孢子 DNA 呈阳性。对 18S rRNA 序列进行的 DNA 测序和系统进化分析将该未知物种定位为一个独特的支系，与组织虫支系 II 和 III 密切相关，但又相互独立。这一发现极大地促进了人们对粘孢子虫多样性和生态学的了解，凸显了墨累河海龟种群以及其他水生爬行动物的健康可能面临的新威胁。这种粘孢子虫的发现不仅扩大了粘孢子虫的已知宿主范围，而且由于其可能具有致病性，还引起了人们对受影响海龟种群保护问题的关注。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal for Parasitology-Parasites and Wildlife Medicine-Infectious Diseases

CiteScore

3.80

自引率

5.60%

发文量

113

审稿时长

45 days

期刊介绍： The International Journal for Parasitology: Parasites and Wildlife (IJP-PAW) publishes the results of original research on parasites of all wildlife, invertebrate and vertebrate. This includes free-ranging, wild populations, as well as captive wildlife, semi-domesticated species (e.g. reindeer) and farmed populations of recently domesticated or wild-captured species (e.g. cultured fishes). Articles on all aspects of wildlife parasitology are welcomed including taxonomy, biodiversity and distribution, ecology and epidemiology, population biology and host-parasite relationships. The impact of parasites on the health and conservation of wildlife is seen as an important area covered by the journal especially the potential role of environmental factors, for example climate. Also important to the journal is ''one health'' and the nature of interactions between wildlife, people and domestic animals, including disease emergence and zoonoses.