Hepatic coccidiosis in Bagre Bagre (Linnaeus, 1766) from the Brazilian Amazon Region Caused by Calyptospora Matosi n. sp. (Apicomplexa: Eimeriidae).

IF 1.2 3区农林科学 Q4 PARASITOLOGY

Acta Parasitologica Pub Date : 2025-06-06 DOI:10.1007/s11686-025-01064-5

José Pompeu de Araujo Neto, Csaba Székely, Jhonata Eduard, Marcia de Nazare Sacco Dos Santos, Camila Maria Barbosa Pereira, Evonnildo Costa Gonçalves, Michele Velasco, José Ledamir Sindeaux Neto

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引用次数: 0

Abstract

Purpose: Coccidia (Coccidiasina) is a subclass of Apicomplexa, known to cause gastrointestinal diseases in animals. Although its importance is recognized, there are few taxonomic studies of coccidia in fish, especially in biomes with high diversity, such as the Brazilian Amazon. Therefore, the present study investigated infections by coccidian microparasites found in the hepatic region of the Coco sea catfish, Bagre bagre.

Methods: Parasitological analyses were performed on 50 specimens of B. bagre collected in Bragança and Curuça, in northern Brazil, between January and December 2021.

Results: Infections caused by coccidiosis were identified in 35 of these specimens, which were infected by parasites of the genus Calyptospora, including both sporulated and non-sporulated forms in the hepatic stroma of the hosts. The oocysts were spherical (mean diameter: 10.52 ± 0.29 μm) and contained four spheroid sporocysts (mean diameter: 4.22 ± 0.23 μm). A consensus sequence (1,320 bp) of the SSU rDNA gene from these parasites was compared with GenBank sequences of other species of the class Coccidiomorphea and the genetic distances indicated that they represented a new species.

Conclusion: The combination of the morphometric and phylogenetic evidence supports conclusively the existence of a new species of the genus Calyptospora, which is denominated Calyptospora matosi n. sp.

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巴西亚马逊地区Bagre Bagre （Linnaeus, 1766）的肝球虫病，由Calyptospora Matosi n. sp.引起。

目的：球虫（coccidiina）是顶复虫的一个亚纲，已知可引起动物胃肠道疾病。尽管人们认识到球虫的重要性，但对球虫在鱼类中的分类学研究很少，特别是在巴西亚马逊河等高多样性的生物群落中。因此，本研究调查了在可可海鲶鱼Bagre Bagre肝区发现的球虫微寄生虫感染。方法：对2021年1 - 12月在巴西北部布拉干帕拉和库鲁帕拉采集的50份巴格雷小蠊标本进行寄生虫学分析。结果：其中35例标本经鉴定为球虫病感染，感染源为萼孢属寄生虫，包括宿主肝基质中有孢子和无孢子两种形式。卵囊呈球形（平均直径10.52±0.29 μm），卵囊内含4个球形孢子囊（平均直径4.22±0.23 μm）。将这些寄生虫的SSU rDNA基因序列与其他球虫纲物种的基因序列进行了比较，遗传距离表明它们是一个新种。结论：形态计量学和系统发育学的综合证据有力地支持了Calyptospora属一新种的存在，命名为Calyptospora matosi n. sp。

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

Acta Parasitologica 医学-寄生虫学

CiteScore

3.10

自引率

6.70%

发文量

149

审稿时长

6-12 weeks

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.