Morphological and molecular characterization of Eimeria haematopusi n. sp. (Apicomplexa: Eimeriidae) in an Australian Pied Oystercatcher (Haematopus longirostris) (Aves: Charadriiformes)
文献类型： 外文期刊
作者： Austen, Jill M. 1 ; Brice, Belinda 2 ; Liu, Dandan 3 ; Gao, Huimin 4 ; Berto, Bruno P. 5 ; Zahedi, Alireza 1 ; Elloit, Aileen 1 ; Yang, Rongchang 1 ;
作者机构： 1.Murdoch Univ, Sch Agr Sci, Murdoch, WA 6150, Australia
2.Kanyana Wildlife Rehabil Ctr, 120 Gilchrist Rd, Lesmurdie, WA 6076, Australia
3.Yangzhou Univ, Jiangsu Coinnovat Ctr Prevent & Control Important, Yangzhou 225009, Jiangsu, Peoples R China
4.Hebei Acad Agr & Forestry Sci, Inst Cash Crops, Shijiazhuang 05005, Peoples R China
5.Univ Fed Rural Rio de Janeiro, Dept Biol Anim, Inst Ciencias Biol & Saude, BR 465 Km 7, BR-23897000 Seropedica, RJ, Brazil
期刊名称：SYSTEMATIC PARASITOLOGY （ 影响因子：1.3； 五年影响因子：1.2 ）
ISSN： 0165-5752
年卷期： 2024 年 101 卷 3 期
页码：
收录情况： SCI
摘要： A novel Eimeria Schneider, 1875 species is described from an Australian pied oystercatcher Haematopus longirostris Vieillot, in Western Australia. The pied oystercatcher was admitted to the Kanyana Wildlife Rehabilitation Centre (KWRC), Perth, Western Australia in a poor body condition, abrasion to its right hock and signs of partial delamination to its lower beak. Investigation into potential medical causes resulted in a faecal sample being collected and screened for gastrointestinal parasites. Unsporulated coccidian oocysts were initially observed in the faeces and identified as Eimeria upon sporulation. The sporulated oocysts (n = 20) are ellipsoidal, 20-21 x 12-13 mu m in shape and have thick bi-layered walls which are c.2/3 of the total thickness. Micropyle is present, robust and protruding, and occasionally has a rounded polar body attached to the micropyle. Within the oocyst, a residuum, in addition, two to five polar granules are present. There are four ellipsoidal sporocysts 9-11 x 5-6 mu m with flattened to half-moon shaped Stieda bodies. Sub-Stieda body and para-Stieda body are absent. The sporocysts contain sporocyst residuums composed of a few spherules scattered among the sporozoites. Within the sporozoites, anterior and posterior refractile bodies are present, but the nucleus is indiscernible. To further characterise the novel Eimeria species from H. longirostris, molecular analysis was conducted at the 18S ribosomal RNA locus, using PCR amplification and cloning. Two cloned sequences from the novel Eimeria were compared with those from other Eimeria spp. with the highest genetic similarity of 97.6% and 97.2% from Clone 1 and 2, respectively with Eimeria reichenowi (AB544308) from a hooded crane (Grus monacha Temminck) in Japan. Both sequences grouped in a clade with the Eimeria spp. isolated from wetland birds, which include Eimeria paludosa (KJ767187) from a dusky moorhen (Gallinula tenebrosa Gould) in Western Australia, Eimeria reichenowi (AB544308) and Eimeria gruis (AB544336) both from hooded cranes. Based on the morphological and molecular data, this Eimeria sp. is a new species of coccidian parasite and is named Eimeria haematopusi n. sp. after its host H. longirostris.
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