UDN-like disease in spawners of salmonid fishes from the Rega, Parsęta, Wieprza, and Słupia rivers in 2009-2012

Abstract Since 2007 in Poland, skin lesions have been observed in salmon ( Salmo salar L.) and sea trout ( Salmo trutta L.) entering Pomeranian rivers to spawn. The clinical picture of affected fish resembled ulcerative dermal necrosis (UDN), a disease of unknown etiology affecting mainly the scalps...

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Published in:Fisheries & Aquatic Life
Main Authors: Kazuń, Barbara, Terech-Majewska, Elżbieta, Grudniewska, Joanna, Kazuń, Krzysztof
Format: Article in Journal/Newspaper
Language:English
Published: Walter de Gruyter GmbH 2023
Subjects:
Online Access:http://dx.doi.org/10.2478/aopf-2023-0007
https://www.sciendo.com/pdf/10.2478/aopf-2023-0007
id crdegruyter:10.2478/aopf-2023-0007
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spelling crdegruyter:10.2478/aopf-2023-0007 2024-09-15T18:33:03+00:00 UDN-like disease in spawners of salmonid fishes from the Rega, Parsęta, Wieprza, and Słupia rivers in 2009-2012 Kazuń, Barbara Terech-Majewska, Elżbieta Grudniewska, Joanna Kazuń, Krzysztof 2023 http://dx.doi.org/10.2478/aopf-2023-0007 https://www.sciendo.com/pdf/10.2478/aopf-2023-0007 en eng Walter de Gruyter GmbH http://creativecommons.org/licenses/by-nc-nd/4.0 Fisheries & Aquatic Life volume 31, issue 2, page 64-71 ISSN 2545-059X journal-article 2023 crdegruyter https://doi.org/10.2478/aopf-2023-0007 2024-07-29T04:11:23Z Abstract Since 2007 in Poland, skin lesions have been observed in salmon ( Salmo salar L.) and sea trout ( Salmo trutta L.) entering Pomeranian rivers to spawn. The clinical picture of affected fish resembled ulcerative dermal necrosis (UDN), a disease of unknown etiology affecting mainly the scalps of wild salmonids. The aim of the 2009-2012 study was to determine with microbiological tests the etiological agent of the skin lesions observed in salmonids entering the Pomeranian rivers. During the study, a total of 13 species of Gram-negative bacteria belonging mainly to the Yersiniaceae, Enterobacteriaceae, and Pseudomonadaceae families were isolated and identified from the skin and kidneys of diseased fish. The Gram-positive bacteria isolated were aerobic, hemolytic granules of the genus Streptococcus. Mycological examinations on damaged fish body surfaces revealed yeasts of the genus Rhodotorula and fungi of the family Saprolegniaceae. The results of our study did not permit us to identify unequivocally the direct cause of the fish diseases analyzed since all the bacteria isolated during the study are normally found in aquatic environments. Some of the isolated bacteria identified were assumed to be potentially pathogenic to fish. The fungal infections observed were probably secondary and only exacerbated ongoing disease processes. Article in Journal/Newspaper Salmo salar De Gruyter Fisheries & Aquatic Life 31 2 64 71
institution Open Polar
collection De Gruyter
op_collection_id crdegruyter
language English
description Abstract Since 2007 in Poland, skin lesions have been observed in salmon ( Salmo salar L.) and sea trout ( Salmo trutta L.) entering Pomeranian rivers to spawn. The clinical picture of affected fish resembled ulcerative dermal necrosis (UDN), a disease of unknown etiology affecting mainly the scalps of wild salmonids. The aim of the 2009-2012 study was to determine with microbiological tests the etiological agent of the skin lesions observed in salmonids entering the Pomeranian rivers. During the study, a total of 13 species of Gram-negative bacteria belonging mainly to the Yersiniaceae, Enterobacteriaceae, and Pseudomonadaceae families were isolated and identified from the skin and kidneys of diseased fish. The Gram-positive bacteria isolated were aerobic, hemolytic granules of the genus Streptococcus. Mycological examinations on damaged fish body surfaces revealed yeasts of the genus Rhodotorula and fungi of the family Saprolegniaceae. The results of our study did not permit us to identify unequivocally the direct cause of the fish diseases analyzed since all the bacteria isolated during the study are normally found in aquatic environments. Some of the isolated bacteria identified were assumed to be potentially pathogenic to fish. The fungal infections observed were probably secondary and only exacerbated ongoing disease processes.
format Article in Journal/Newspaper
author Kazuń, Barbara
Terech-Majewska, Elżbieta
Grudniewska, Joanna
Kazuń, Krzysztof
spellingShingle Kazuń, Barbara
Terech-Majewska, Elżbieta
Grudniewska, Joanna
Kazuń, Krzysztof
UDN-like disease in spawners of salmonid fishes from the Rega, Parsęta, Wieprza, and Słupia rivers in 2009-2012
author_facet Kazuń, Barbara
Terech-Majewska, Elżbieta
Grudniewska, Joanna
Kazuń, Krzysztof
author_sort Kazuń, Barbara
title UDN-like disease in spawners of salmonid fishes from the Rega, Parsęta, Wieprza, and Słupia rivers in 2009-2012
title_short UDN-like disease in spawners of salmonid fishes from the Rega, Parsęta, Wieprza, and Słupia rivers in 2009-2012
title_full UDN-like disease in spawners of salmonid fishes from the Rega, Parsęta, Wieprza, and Słupia rivers in 2009-2012
title_fullStr UDN-like disease in spawners of salmonid fishes from the Rega, Parsęta, Wieprza, and Słupia rivers in 2009-2012
title_full_unstemmed UDN-like disease in spawners of salmonid fishes from the Rega, Parsęta, Wieprza, and Słupia rivers in 2009-2012
title_sort udn-like disease in spawners of salmonid fishes from the rega, parsęta, wieprza, and słupia rivers in 2009-2012
publisher Walter de Gruyter GmbH
publishDate 2023
url http://dx.doi.org/10.2478/aopf-2023-0007
https://www.sciendo.com/pdf/10.2478/aopf-2023-0007
genre Salmo salar
genre_facet Salmo salar
op_source Fisheries & Aquatic Life
volume 31, issue 2, page 64-71
ISSN 2545-059X
op_rights http://creativecommons.org/licenses/by-nc-nd/4.0
op_doi https://doi.org/10.2478/aopf-2023-0007
container_title Fisheries & Aquatic Life
container_volume 31
container_issue 2
container_start_page 64
op_container_end_page 71
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