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Kruth PS, Michel C, Amery-Gale J, Barta JR. Full Mitochondrial Genome and Nuclear 18S rDNA Sequences Refine the Taxonomic Placement of Choleoeimeria taggarti n. comb. from the Prostate of Antechinus flavipes (Yellow-Footed Antechinus). J Parasitol 2020; 106:71-81. [PMID: 31995717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023] Open
Abstract
An unusual coccidian parasite was described previously from the prostate of a male Antechinus flavipes (family: Dasyuridae; common name: yellow-footed antechinus). Morphometrics and a partial nuclear 18S small subunit rDNA (18S rDNA) sequence were used to assign this parasite to the genus Eimeria; it was named Eimeria taggarti. We generated full nuclear 18S rDNA and mitochondrial genome sequences from this parasite and used the newly completed 18S rDNA and mitochondrial cytochrome c oxidase subunit I (COI) sequences to perform a more in-depth phylogenetic analysis. The parasite clustered closely with Choleoeimeria spp. and Acroeimeria spp. infecting herptiles in a well-supported clade that was the sister lineage to the Eimeriidae sensu stricto. The mitochondrial genome of this parasite contained 2 inverted segments compared to mitochondrial genomes from parasites in the Eimeriidae sensu stricto (i.e., Stieda body-possessing coccidia with 4 dizoic sporocysts); this mitochondrial genome arrangement was shared with the only Choleoeimeria species for which sequence data were available publicly. Examination of histological preparations and TEM images uncovered bivalvate sporocysts and otherwise confirmed previously described morphological features of the parasite. Based on our phylogenetic analyses and histological observations, we propose the generic reclassification of E. taggarti to Choleoeimeria taggarti n. comb.
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Affiliation(s)
- P S Kruth
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Ontario, Canada N1G 2W1
| | - C Michel
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Ontario, Canada N1G 2W1
| | - J Amery-Gale
- Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria 3010, Australia
| | - J R Barta
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Ontario, Canada N1G 2W1
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Kruth PS, Michel C, Amery-Gale J, Barta JR. Full Mitochondrial Genome and Nuclear 18S rDNA Sequences Refine the Taxonomic Placement of Choleoeimeria taggarti n. comb. from the Prostate of Antechinus flavipes (Yellow-Footed Antechinus). J Parasitol 2020. [DOI: 10.1645/19-57] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- P. S. Kruth
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Ontario, Canada N1G 2W1
| | - C. Michel
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Ontario, Canada N1G 2W1
| | - J. Amery-Gale
- Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria 3010, Australia
| | - J. R. Barta
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Ontario, Canada N1G 2W1
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Amery-Gale J, Devlin JM, Tatarczuch L, Taggart DA, Schultz DJ, Charles JA, Beveridge I. Eimeria taggarti N. Sp., a Novel Coccidian (Apicomplexa: Eimeriorina) in the Prostate of an Antechinus flavipes. J Parasitol 2017; 104:31-38. [PMID: 29119858 DOI: 10.1645/17-111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
A novel coccidian species was discovered in the prostate of an Antechinus flavipes (yellow-footed antechinus) in South Australia during the period of postmating male antechinus immunosuppression and mortality. This novel coccidian is unusual because it develops extraintestinally and sporulates endogenously within the prostate gland of its mammalian host. Histological examination of prostatic tissue revealed dense aggregations of spherical and thin-walled tetrasporocystic, dizoic, sporulated coccidian oocysts within tubular lumina, with unsporulated oocysts and gamogonic stages within the cytoplasm of glandular epithelial cells. This coccidian was observed occurring concurrently with dasyurid gammaherpesvirus 1 infection of the antechinus' prostate. Eimeria-specific 18S small-subunit ribosomal (r)DNA polymerase chain reaction amplification was used to obtain a partial 18S rDNA nucleotide sequence from the antechinus coccidian. Bayesian phylogenetic analysis based on 18S rDNA gene sequences revealed that the novel coccidian clusters with reptile-host coccidians, forming an ancestral basal lineage of the eimeriid clade. The species has been named Eimeria taggarti n. sp. on the basis of both sporulated oocyst morphology and molecular characterization. It is suspected that E. taggarti is sexually transmitted via excretion of sporulated oocysts or free sporocysts with prostatic secretions in semen.
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Affiliation(s)
- J Amery-Gale
- Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - J M Devlin
- Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - L Tatarczuch
- Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - D A Taggart
- Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - D J Schultz
- Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - J A Charles
- Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - I Beveridge
- Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia
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