18S rRNA基因的系统发育分析反映了所选原生寄生虫传播途径依赖的遗传多样性。

IF 0.7 4区 农林科学 Q3 VETERINARY SCIENCES
Acta veterinaria Hungarica Pub Date : 2025-03-27 Print Date: 2025-04-22 DOI:10.1556/004.2025.01128
Sándor Hornok, Gergő Keve, Barbara Tuska-Szalay
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引用次数: 0

摘要

在这项试点研究中,根据原生动物寄生虫的不同传播途径(生命周期策略)分析了它们的遗传多样性,重点是那些最近在匈牙利或其地理区域发现或首次进行分子分析的物种。结果表明,在4种顶复合体寄生虫(巴贝斯虫、欧洲巴贝斯虫、莫尔肉囊虫和猫肝虫)中,后者具有最高的遗传多样性,其18S rRNA基因序列显示出较高的种内最大配对距离(1.75%),并且从其系统发育聚类来看,后者具有最高的遗传多样性。这可能与狐猴漫长的进化史、缺乏血管内分裂和其他生命周期特征有关,这些特征排除了宿主之间的直接传播。另一方面,在非顶复合体原虫(鸡毛滴虫、人五毛滴虫、胎儿毛滴虫和castellanacanthamoeba)中,后者具有最高的遗传多样性(7.73%),这很可能是由于其进化历史长、基因横向转移、同源重组以及没有直接的宿主间传播。传播方式对原生动物寄生虫的遗传多样性有显著影响,这取决于生命周期策略和随之而来的有性生殖与二元裂变的频率/机会。特别是,在寄主之间没有直接传播是猫毛猴和卡斯特兰猴的共同特征,这有助于它们的高遗传多样性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Transmission route-dependent genetic diversity of selected protozoan parasites as reflected by the phylogenetic analysis of the 18S rRNA gene.

In this pilot study, the genetic diversity of protozoan parasites was analysed according to their different transmission routes (life cycle strategies), focusing on those species which were recently discovered or molecularly analysed for the first time in Hungary or its geographical region. The results showed that among four apicomplexan parasites (Babesia gibsoni, Cytauxzoon europaeus, Sarcocystis morae and Hepatozoon felis) the latter had the highest genetic diversity as reflected by its 18S rRNA gene sequences showing high (1.75%) maximum intraspecific pairwise distance, and also, based on its phylogenetic clustering. This is probably related to the long evolutionary history of H. felis, the absence of its intravascular division and other life cycle characteristics precluding direct transmission between hosts. On the other hand, among non-apicomplexan protozoa (Trichomonas gallinae, Pentatrichomonas hominis, Tritrichomonas foetus and Acanthamoeba castellanii), the latter proved to have the highest genetic diversity (7.73%), most likely due to its long evolutionary history, lateral gene transfer, homologous recombination and the absence of direct host-to-host dispersal. Transmission mode had a significant impact on the genetic diversity among protozoan parasites, depending on life cycle strategies and consequent frequency/chance of sexual reproduction vs binary fission. In particular, the absence of direct transmission between hosts is a common trait of H. felis and A. castellanii, contributing to their high genetic diversity.

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来源期刊
Acta veterinaria Hungarica
Acta veterinaria Hungarica 农林科学-兽医学
CiteScore
1.80
自引率
0.00%
发文量
39
审稿时长
>36 weeks
期刊介绍: Acta Veterinaria Hungarica publishes original research papers presenting new scientific results of international interest, and to a limited extent also review articles and clinical case reports, on veterinary physiology (physiological chemistry and metabolism), veterinary microbiology (bacteriology, virology, immunology, molecular biology), on the infectious diseases of domestic animals, on veterinary parasitology, pathology, clinical veterinary science and reproduction.
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