Molecular identification and transmission studies of X-cell parasites from Atlantic cod Gadus morhua (Gadiformes: Gadidae) and the northern black flounder Pseudopleuronectes obscurus (Pleuronectiformes: Pleuronectidae)
Background: Epidermal pseudotumours from Hippoglossoides dubius and Acanthogobius flavimanus in Japan and gill lesions in Limanda limanda from the UK have been shown to be caused by phylogenetically related protozoan parasites, known collectively as X-cells. However, the phylogenetic position of the...
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ftunivstirling:oai:dspace.stir.ac.uk:1893/10202 2023-05-15T15:27:01+02:00 Molecular identification and transmission studies of X-cell parasites from Atlantic cod Gadus morhua (Gadiformes: Gadidae) and the northern black flounder Pseudopleuronectes obscurus (Pleuronectiformes: Pleuronectidae) Freeman, Mark Eydal, Matthias Yoshimizu, M Watanabe, K Shinn, Andrew Miura, K Ogawa, Kazuo University of Malaya University of Iceland Hokkaido University Tokyo University of Agriculture Institute of Aquaculture Hokkaido Central Fisheries Experimental Station University of Tokyo orcid:0000-0002-5434-2685 2011-02 application/pdf http://hdl.handle.net/1893/10202 https://doi.org/10.1186/1756-3305-4-15 http://dspace.stir.ac.uk/bitstream/1893/10202/1/Freeman%20X-cell%202011.pdf en eng BioMed Central Freeman M, Eydal M, Yoshimizu M, Watanabe K, Shinn A, Miura K & Ogawa K (2011) Molecular identification and transmission studies of X-cell parasites from Atlantic cod Gadus morhua (Gadiformes: Gadidae) and the northern black flounder Pseudopleuronectes obscurus (Pleuronectiformes: Pleuronectidae). Parasites and Vectors, 4 (1), p. 15. https://doi.org/10.1186/1756-3305-4-15 http://hdl.handle.net/1893/10202 doi:10.1186/1756-3305-4-15 WOS:000287933500001 2-s2.0-79551642383 752261 http://dspace.stir.ac.uk/bitstream/1893/10202/1/Freeman%20X-cell%202011.pdf This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. http://creativecommons.org/licenses/by/2.0/ CC-BY Journal Article VoR - Version of Record 2011 ftunivstirling https://doi.org/10.1186/1756-3305-4-15 2022-06-13T18:43:13Z Background: Epidermal pseudotumours from Hippoglossoides dubius and Acanthogobius flavimanus in Japan and gill lesions in Limanda limanda from the UK have been shown to be caused by phylogenetically related protozoan parasites, known collectively as X-cells. However, the phylogenetic position of the X-cell group is not well supported within any of the existing protozoan phyla and they are currently thought to be members of the Alveolata. Ultrastructural features of X-cells in fish pseudotumours are somewhat limited and no typical environmental stages, such as spores or flagellated cells, have been observed. The life cycles for these parasites have not been demonstrated and it remains unknown how transmission to a new host occurs. In the present study, pseudobranchial pseudotumours from Atlantic cod, Gadus morhua, in Iceland and epidermal pseudotumours from the northern black flounder, Pseudopleuronectes obscurus, in Japan were used in experimental transmission studies to establish whether direct transmission of the parasite is achievable. In addition, X-cells from Atlantic cod were sequenced to confirm whether they are phylogenetically related to other X-cells and epidermal pseudotumours from the northern black flounder were analysed to establish whether the same parasite is responsible for infecting different flatfish species in Japan. Results: Phylogenetic analyses of small subunit ribosomal DNA (SSU rDNA) sequence data from Atlantic cod X-cells show that they are a related parasite that occupies a basal position to the clade containing other X-cell parasites. The X-cell parasite causing epidermal pseudotumours in P. obscurus is the same parasite that causes pseudotumours in H. dubius. Direct, fish to fish, transmission of the X-cell parasites used in this study, via oral feeding or injection, was not achieved. Non-amoeboid X-cells are contained within discrete sac-like structures that are loosely attached to epidermal pseudotumours in flatfish; these X-cells are able to tolerate exposure to seawater. A ... Article in Journal/Newspaper atlantic cod Gadus morhua Iceland University of Stirling: Stirling Digital Research Repository Parasites & Vectors 4 1 15 |
institution |
Open Polar |
collection |
University of Stirling: Stirling Digital Research Repository |
op_collection_id |
ftunivstirling |
language |
English |
description |
Background: Epidermal pseudotumours from Hippoglossoides dubius and Acanthogobius flavimanus in Japan and gill lesions in Limanda limanda from the UK have been shown to be caused by phylogenetically related protozoan parasites, known collectively as X-cells. However, the phylogenetic position of the X-cell group is not well supported within any of the existing protozoan phyla and they are currently thought to be members of the Alveolata. Ultrastructural features of X-cells in fish pseudotumours are somewhat limited and no typical environmental stages, such as spores or flagellated cells, have been observed. The life cycles for these parasites have not been demonstrated and it remains unknown how transmission to a new host occurs. In the present study, pseudobranchial pseudotumours from Atlantic cod, Gadus morhua, in Iceland and epidermal pseudotumours from the northern black flounder, Pseudopleuronectes obscurus, in Japan were used in experimental transmission studies to establish whether direct transmission of the parasite is achievable. In addition, X-cells from Atlantic cod were sequenced to confirm whether they are phylogenetically related to other X-cells and epidermal pseudotumours from the northern black flounder were analysed to establish whether the same parasite is responsible for infecting different flatfish species in Japan. Results: Phylogenetic analyses of small subunit ribosomal DNA (SSU rDNA) sequence data from Atlantic cod X-cells show that they are a related parasite that occupies a basal position to the clade containing other X-cell parasites. The X-cell parasite causing epidermal pseudotumours in P. obscurus is the same parasite that causes pseudotumours in H. dubius. Direct, fish to fish, transmission of the X-cell parasites used in this study, via oral feeding or injection, was not achieved. Non-amoeboid X-cells are contained within discrete sac-like structures that are loosely attached to epidermal pseudotumours in flatfish; these X-cells are able to tolerate exposure to seawater. A ... |
author2 |
University of Malaya University of Iceland Hokkaido University Tokyo University of Agriculture Institute of Aquaculture Hokkaido Central Fisheries Experimental Station University of Tokyo orcid:0000-0002-5434-2685 |
format |
Article in Journal/Newspaper |
author |
Freeman, Mark Eydal, Matthias Yoshimizu, M Watanabe, K Shinn, Andrew Miura, K Ogawa, Kazuo |
spellingShingle |
Freeman, Mark Eydal, Matthias Yoshimizu, M Watanabe, K Shinn, Andrew Miura, K Ogawa, Kazuo Molecular identification and transmission studies of X-cell parasites from Atlantic cod Gadus morhua (Gadiformes: Gadidae) and the northern black flounder Pseudopleuronectes obscurus (Pleuronectiformes: Pleuronectidae) |
author_facet |
Freeman, Mark Eydal, Matthias Yoshimizu, M Watanabe, K Shinn, Andrew Miura, K Ogawa, Kazuo |
author_sort |
Freeman, Mark |
title |
Molecular identification and transmission studies of X-cell parasites from Atlantic cod Gadus morhua (Gadiformes: Gadidae) and the northern black flounder Pseudopleuronectes obscurus (Pleuronectiformes: Pleuronectidae) |
title_short |
Molecular identification and transmission studies of X-cell parasites from Atlantic cod Gadus morhua (Gadiformes: Gadidae) and the northern black flounder Pseudopleuronectes obscurus (Pleuronectiformes: Pleuronectidae) |
title_full |
Molecular identification and transmission studies of X-cell parasites from Atlantic cod Gadus morhua (Gadiformes: Gadidae) and the northern black flounder Pseudopleuronectes obscurus (Pleuronectiformes: Pleuronectidae) |
title_fullStr |
Molecular identification and transmission studies of X-cell parasites from Atlantic cod Gadus morhua (Gadiformes: Gadidae) and the northern black flounder Pseudopleuronectes obscurus (Pleuronectiformes: Pleuronectidae) |
title_full_unstemmed |
Molecular identification and transmission studies of X-cell parasites from Atlantic cod Gadus morhua (Gadiformes: Gadidae) and the northern black flounder Pseudopleuronectes obscurus (Pleuronectiformes: Pleuronectidae) |
title_sort |
molecular identification and transmission studies of x-cell parasites from atlantic cod gadus morhua (gadiformes: gadidae) and the northern black flounder pseudopleuronectes obscurus (pleuronectiformes: pleuronectidae) |
publisher |
BioMed Central |
publishDate |
2011 |
url |
http://hdl.handle.net/1893/10202 https://doi.org/10.1186/1756-3305-4-15 http://dspace.stir.ac.uk/bitstream/1893/10202/1/Freeman%20X-cell%202011.pdf |
genre |
atlantic cod Gadus morhua Iceland |
genre_facet |
atlantic cod Gadus morhua Iceland |
op_relation |
Freeman M, Eydal M, Yoshimizu M, Watanabe K, Shinn A, Miura K & Ogawa K (2011) Molecular identification and transmission studies of X-cell parasites from Atlantic cod Gadus morhua (Gadiformes: Gadidae) and the northern black flounder Pseudopleuronectes obscurus (Pleuronectiformes: Pleuronectidae). Parasites and Vectors, 4 (1), p. 15. https://doi.org/10.1186/1756-3305-4-15 http://hdl.handle.net/1893/10202 doi:10.1186/1756-3305-4-15 WOS:000287933500001 2-s2.0-79551642383 752261 http://dspace.stir.ac.uk/bitstream/1893/10202/1/Freeman%20X-cell%202011.pdf |
op_rights |
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. http://creativecommons.org/licenses/by/2.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1186/1756-3305-4-15 |
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