Eimeria akrurensis n. sp. (Apicomplexa: Eimeriidae), a New Coccidian Parasite from the Domestic Goat (Capra hircus) in Dharashiv (Previously Osmanabad), India.

IF 1.2 4区医学 Q4 PARASITOLOGY

Systematic Parasitology Pub Date : 2026-02-19 DOI:10.1007/s11230-026-10268-w

Tejswini Sontakke, Ashwini Biradar, Dinesh Nalage, Vidya Pradhan

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Abstract

Coccidiosis caused by Eimeria species remains a significant protozoan disease affecting the health and productivity of small ruminants. During a faecal survey of domestic goats (Capra hircus) conducted in Dharashiv (Previously Osmanabad) District, Maharashtra, India (June 2013-May 2015), a new Eimeria species was identified and described. A total of 3,004 fecal samples were examined, of which 2,473 samples were positive for coccidian infection. Among these, 261 samples were found positive for the new species (Eimeria akrurensis n. sp.), with an overall prevalence of 10.6%. The oocysts of E. akrurensis n. sp. are subspherical to elongate, bilayered, and measure 23.0 × 20.5 µm (range: 19.0-27.0 × 17.0-24.0 µm) with an L/W ratio of 1.12. The oocysts possess a distinct micropyle (2.0-4.0 µm wide) and micropylar cap (1.0-2.0 µm high × 2.0-4.0 µm wide), but lack an oocyst residuum; two or more polar granules are present. Sporocysts are ovoid, 10.5 × 7.5 µm, with a prominent Stieda body and a few scattered granules forming the oocyst residuum. In potassium dichromate, sporulation occurs within 60-90 hours at 24-26°C in samples. The new species differs from Eimeria crandallis and Eimeria hirci by its subspherical shape, smaller micropyle and micropylar cap, and prominent Stieda body. This discovery adds to the known diversity of caprine coccidia and contributes to the understanding of host-specific Eimeria spp. fauna in the semi-arid region of Maharashtra, India.

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印度Dharashiv（原Osmanabad）家山羊（Capra hircus）的一种新的球虫寄生虫akrureneimeria n. sp.（顶复体：艾美耳虫科）。

球虫病是由艾美耳球虫引起的一种严重影响小反刍动物健康和生产力的原生动物疾病。2013年6月至2015年5月，在印度马哈拉施特拉邦Dharashiv（原Osmanabad）地区对家山羊（Capra hircus）进行的粪便调查中，发现并描述了一种新的艾美尔亚种。共检查粪便标本3004份，其中球虫感染阳性标本2473份。其中，261份样品检出akrurenemeria n. sp.新种，总检出率为10.6%。akrurensis n. sp.卵囊呈亚球形至细长状，双层状，尺寸为23.0 × 20.5µm（范围：19.0 ~ 27.0 × 17.0 ~ 24.0µm）， L/W比为1.12。卵囊具有明显的微孔（2.0 ~ 4.0µm宽）和微孔帽（1.0 ~ 2.0µm高× 2.0 ~ 4.0µm宽），但没有卵囊残留物；存在两个或更多的极性颗粒。卵囊呈卵形，直径10.5 × 7.5µm，卵囊残体呈明显的圆形，零星有颗粒形成。在重铬酸钾中，样品在24-26°C下，孢子形成在60-90小时内发生。该新种与大球型艾美耳球虫和hirci艾美耳球虫的不同之处是其形状接近球形，微孔和微孔帽较小，体长突出。这一发现增加了已知的山羊球虫的多样性，并有助于了解印度马哈拉施特拉半干旱地区的宿主特异性艾美耳球虫动物群。

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来源期刊

Systematic Parasitology 医学-寄生虫学

CiteScore

2.20

自引率

23.10%

发文量

审稿时长

6-12 weeks

期刊介绍： Systematic Parasitology publishes papers on the systematics, taxonomy and nomenclature of the following groups: Nematoda (including plant-parasitic), Monogenea, Digenea, Cestoda, Acanthocephala, Aspidogastrea, Cestodaria, Arthropoda (parasitic copepods, hymenopterans, mites, ticks, etc.), Protozoa (parasitic groups), and parasitic genera in other groups, such as Mollusca, Turbelleria, etc. Systematic Parasitology publishes fully illustrated research papers, brief communications, and fully illustrated major revisions. In order to maintain high standards, all contributors describing new taxa are asked to state clearly where the holotype is deposited and to make paratypes available for examination by the referees. It is recognized that, in some cases, this may cause problems for the authors, but it is hoped that by adhering to this rule authors may be protected against rapid synonymy of their taxa, and the types will be preserved for posterity.