Morphological and molecular description of a new species of Isospora (Apicomplexa) from a New Holland honeyeater (Phylidonyris novaehollandiae)

R. Yang; B. Brice; B.P. Berto; U. Ryan

doi:10.1016/j.parint.2021.102348

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Morphological and molecular description of a new species of Isospora (Apicomplexa) from a New Holland honeyeater (Phylidonyris novaehollandiae)

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Morphological and molecular description of a new species of Isospora (Apicomplexa) from a New Holland honeyeater (Phylidonyris novaehollandiae)

R. Yang, B. Brice, B.P. Berto and U. Ryan

Parasitology International, Vol.83, Art. 102348

2021

DOI: https://doi.org/10.1016/j.parint.2021.102348

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Abstract

A new Isospora species is described from New Holland honeyeaters (Phylidonyris novaehollandiae). Sporulated oocysts (n = 25) were characterised as subspheroidal, 29–32 × 28–31 (29.8 × 29.4); length/width (L/W) ratio 1.01–1.02 (1.01). Wall bi-layered, 1.3–1.6 (1.5) thick, outer layer smooth, c.2/3 of total thickness. Micropyle and oocyst residuum absent, but usually two polar granules are present. Sporocysts (n = 25) ovoidal, 18–19 × 12–14 (18.4 × 12.3); L/W ratio 1.42–1.53 (1.50). Stieda body present, flattened, c.0.5 deep × 2.5 wide; sub-Stieda present, rounded, c.2.5 deep × 3.5 wide; para-Stieda body absent; sporocyst residuum present, usually a distinctly irregular body consisting of numerous small granules that appear to be membrane-bound. Sporozoites vermiform, with robust anterior and posterior refractile bodies. Molecular characterization was conducted at the 18S and 28S ribosomal RNA and the mitochondrial (mt) cytochrome oxidase (COI) loci. Phylogenetic analysis of genomic 18S and mt COI sequences indicated that Isospora phylidonyrisae n. sp. was genetically similar to Isospora coronoideae, isolated from an Australian raven (Corvus coronoides) in Western Australia, with a 99.3% and 98.4% homology, respectively. The 28S rRNA sequence was most similar to Isospora anthochaerae (KF766053) and Isospora manorinae (KT224381), both with a 98.2% genetic similarity. Based on morphological and genetic data, this isolate is a new species of Isospora, which is named Isospora phylidonyrisae n. sp. after its host.

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Title: Morphological and molecular description of a new species of Isospora (Apicomplexa) from a New Holland honeyeater (Phylidonyris novaehollandiae)
Authors/Creators: R. Yang (Author/Creator) - Murdoch University
B. Brice (Author/Creator) - Kanyana Wildlife Rehabilitation Centre, 120 Gilchrist Road, Lesmurdie 6076, Western Australia, Australia.
B.P. Berto (Author/Creator) - Universidade Federal Rural do Rio de Janeiro
U. Ryan (Author/Creator) - Murdoch University
Publication Details: Parasitology International, Vol.83, Art. 102348
Publisher: Elsevier BV
Identifiers: 991005545040707891
Copyright: © 2021 Published by Elsevier B.V.
Murdoch Affiliation: Australian National Phenome Centre; Harry Butler Institute; Health Futures Institute; Vector and Waterborne Pathogens Research Group
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 1 Clinical & Life Sciences; 1.217 Parasitology - Malaria, Toxoplasmosis & Coccidiosis; 1.217.1890 Coccidiosis
Web Of Science research areas: Parasitology
ESI research areas: Microbiology