Morphological and molecular characterization of Isospora elliotae n. sp. (Apicomplexa: Eimeriidae) from the Australian magpie Gymnorhina tibicen (Latham, 1801) (Passeriformes: Artamidae) in Western Australia
文献类型： 外文期刊
作者： Yang, Rongchang 1 ; Egan, Siobhon 1 ; Gao, Huimin 2 ; Brice, Belinda 3 ; Berto, Bruno P. 4 ;
作者机构： 1.Murdoch Univ, Hlth Futures Inst, Australian Natl Phenome Ctr, Perth, WA, Australia
2.Hebei Acad Agr & Forestry Sci, Inst Cash Crops, Shijiazhuang, Peoples R China
3.Kanyana Wildlife Rehabil Ctr, Lesmurdie, WA, Australia
4.Univ Fed Rural Rio de Janeiro, Dept Biol Anim, Inst Ciencias Biol & Saude, Seropedica, Brazil
5.Murdoch Univ, Hlth Futures Inst, Australian Natl Phenome Ctr, Harry Perkins Bldg, Perth, WA 6150, Australia
关键词： 18S rRNA gene; 28S rRNA gene; Australian magpie; coccidia; COI gene; Isospora
期刊名称：ECOLOGY AND EVOLUTION （ 影响因子：2.6； 五年影响因子：3.0 ）
ISSN： 2045-7758
年卷期： 2023 年 13 卷 9 期
页码：
收录情况： SCI
摘要： A new coccidian species, Isospora elliotae n. sp., from the Australian magpie Gymnorhina tibicen (Latham, 1801) in Western Australia, is described and characterized morphologically and molecularly. Microscopic analysis of a faecal sample identified subspheroidal oocysts (n = 20), 20-22 x 18-20 (20.7 x 18.7); length/width (L/W) ratio 1.05-1.14 (1.10). Wall bi-layered, 1.0-1.3 (1.2) thick, outer layer smooth, c. 2/3 of total thickness. Micropyle and oocyst residuum absent, but usually two polar granules are present. Sporocysts (n = 28) ovoidal, 12-13 x 9-11 (12.6 x 9.7); L/W ratio 1.22-1.35 (1.30). Stieda body present, flattened to half-moon-shaped, c. 0.5 deep x 2.0 wide; sub-Stieda indistinct or barely discernible, c. 1.0 deep x 2.5 wide; para-Stieda body absent; sporocyst residuum present, composed of granules dispersed among the sporozoites. Sporozoites vermiform, with anterior and posterior refractile bodies and nucleus. Segments of three gene loci (18S rRNA, 28S rRNA and COI) were sequenced and I. elliotae n. sp. exhibited 99.8% genetic similarity to Isospora sp. MAH-2013a (KF648870) followed by 99.7% genetic similarity to Isospora neochmiae (Yang, Brice & Ryan, 2016) (KT224380) at the 18S rRNA gene locus. It shared 97.0% genetic similarity with an unnamed Isospora sp. (AY283852) at the 28S rRNA gene locus and it also shared the highest genetic similarity of 99.8% with the unnamed Isospora sp. from an American crow (OL999120) at the COI gene locus. Based on morphological and molecular data, this isolate is a new species named as I. elliotae n. sp.
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