Tenacibaculosis in Norwegian farmed Atlantic salmon
Tenacibaculosis is a bacterial ulcerative skin disease of many economically important farmed fish species worldwide caused by members of genus Tenacibaculum. For the Norwegian salmon farming industry, however, tenacibaculosis was not recognized as an important disease until 2010. Since then, the inc...
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The University of Bergen
2018
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ftunivbergen:oai:bora.uib.no:1956/19440 2023-05-15T15:31:04+02:00 Tenacibaculosis in Norwegian farmed Atlantic salmon Småge, Sverre Bang 2018-12-06 application/pdf http://hdl.handle.net/1956/19440 eng eng The University of Bergen Paper I: Småge, S.B., Brevik, Ø.J., Duesund, H., Ottem, K.F., Watanabe, K., Nylund, A. (2015) Tenacibaculum finnmarkense sp. nov., a fish pathogenic bacterium of the family Flavobacteriaceae isolated from Atlantic salmon. Antonie van Leeuwenhoek, 109, 273-285. The article is available at: http://hdl.handle.net/1956/15237 Paper II: Småge, S.B., Brevik, Ø.J., Frisch, K., Duesund, H., Watanabe, K., Nylund, A. (2017) Concurrent jellyfish blooms and tenacibaculosis outbreaks in Northern Norwegian Atlantic salmon (Salmo salar) farms. PLOS ONE. 12(11): e0187476. The article is available at: http://hdl.handle.net/1956/18141 Paper III: Småge, S.B., Frisch, K., Vold, V., Duesund, H., Brevik, Ø.J. Hetlelid Olsen, R., Sjaatil, S.T., Klevan, A., Brudeseth, B., Watanabe, K., Nylund, A. (2018) Experimentally induced tenacibaculosis in Atlantic salmon smolts using Tenacibaculum finnmarkense. Aquaculture, 495, 858 -864. The article is available at: http://hdl.handle.net/1956/19439 http://hdl.handle.net/1956/19440 cristin:1645659 Copyright the author. All rights reserved Doctoral thesis 2018 ftunivbergen 2023-03-14T17:43:26Z Tenacibaculosis is a bacterial ulcerative skin disease of many economically important farmed fish species worldwide caused by members of genus Tenacibaculum. For the Norwegian salmon farming industry, however, tenacibaculosis was not recognized as an important disease until 2010. Since then, the increased use of media supporting Tenacibaculum growth has resulted in the identification of Tenacibaculum spp. from a large number of outbreaks of skin lesions/ulcers. Bacterial skin infections that cause skin lesions/ulcers in farmed Atlantic salmon are not only important fish health and welfare issues that needs to be solved, but also cause significant economic losses. From investigations of tenacibaculosis outbreaks in the northernmost parts of Norway, a Tenacibaculum sp. strain was repeatedly identified over several years at multiple farms. Sequence similarity analysis showed that this Tenacibaculum sp. strain was most closely related to Tenacibaculum dicentrarchi, but different enough to constitute a novel Tenacibaculum species. A polyphasic investigation showed that this was indeed a novel species in the genus Tenacibaculum, for which the name Tenacibaculum finnmarkense was proposed. The delineation of T. finnmarkense and T. dicentrarchi has since been further demonstrated by whole genome analysis. In September 2015, two separate outbreaks of tenacibaculosis occurred at two Atlantic salmon farms in Northern Norway. The events resulted in major losses of smolts newly transferred into seawater. Prior to, and during the outbreaks, large numbers of small jellyfish, identified as Dipleurosoma typicum (Boeck) were observed in the vicinity of the farms and inside the net-pens. During these outbreaks, T. finnmarkense was found to be the dominant bacteria associated with the outbreaks. Moreover it was shown that D. typicum were unlikely to be a vector for T. finnmarkense. However, it was shown that the jellyfish caused direct damage to the fish’s skin which likely exacerbated the bacterial infection by allowing an entry ... Doctoral or Postdoctoral Thesis Atlantic salmon Northern Norway University of Bergen: Bergen Open Research Archive (BORA-UiB) Norway |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Tenacibaculosis is a bacterial ulcerative skin disease of many economically important farmed fish species worldwide caused by members of genus Tenacibaculum. For the Norwegian salmon farming industry, however, tenacibaculosis was not recognized as an important disease until 2010. Since then, the increased use of media supporting Tenacibaculum growth has resulted in the identification of Tenacibaculum spp. from a large number of outbreaks of skin lesions/ulcers. Bacterial skin infections that cause skin lesions/ulcers in farmed Atlantic salmon are not only important fish health and welfare issues that needs to be solved, but also cause significant economic losses. From investigations of tenacibaculosis outbreaks in the northernmost parts of Norway, a Tenacibaculum sp. strain was repeatedly identified over several years at multiple farms. Sequence similarity analysis showed that this Tenacibaculum sp. strain was most closely related to Tenacibaculum dicentrarchi, but different enough to constitute a novel Tenacibaculum species. A polyphasic investigation showed that this was indeed a novel species in the genus Tenacibaculum, for which the name Tenacibaculum finnmarkense was proposed. The delineation of T. finnmarkense and T. dicentrarchi has since been further demonstrated by whole genome analysis. In September 2015, two separate outbreaks of tenacibaculosis occurred at two Atlantic salmon farms in Northern Norway. The events resulted in major losses of smolts newly transferred into seawater. Prior to, and during the outbreaks, large numbers of small jellyfish, identified as Dipleurosoma typicum (Boeck) were observed in the vicinity of the farms and inside the net-pens. During these outbreaks, T. finnmarkense was found to be the dominant bacteria associated with the outbreaks. Moreover it was shown that D. typicum were unlikely to be a vector for T. finnmarkense. However, it was shown that the jellyfish caused direct damage to the fish’s skin which likely exacerbated the bacterial infection by allowing an entry ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Småge, Sverre Bang |
spellingShingle |
Småge, Sverre Bang Tenacibaculosis in Norwegian farmed Atlantic salmon |
author_facet |
Småge, Sverre Bang |
author_sort |
Småge, Sverre Bang |
title |
Tenacibaculosis in Norwegian farmed Atlantic salmon |
title_short |
Tenacibaculosis in Norwegian farmed Atlantic salmon |
title_full |
Tenacibaculosis in Norwegian farmed Atlantic salmon |
title_fullStr |
Tenacibaculosis in Norwegian farmed Atlantic salmon |
title_full_unstemmed |
Tenacibaculosis in Norwegian farmed Atlantic salmon |
title_sort |
tenacibaculosis in norwegian farmed atlantic salmon |
publisher |
The University of Bergen |
publishDate |
2018 |
url |
http://hdl.handle.net/1956/19440 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Northern Norway |
genre_facet |
Atlantic salmon Northern Norway |
op_relation |
Paper I: Småge, S.B., Brevik, Ø.J., Duesund, H., Ottem, K.F., Watanabe, K., Nylund, A. (2015) Tenacibaculum finnmarkense sp. nov., a fish pathogenic bacterium of the family Flavobacteriaceae isolated from Atlantic salmon. Antonie van Leeuwenhoek, 109, 273-285. The article is available at: http://hdl.handle.net/1956/15237 Paper II: Småge, S.B., Brevik, Ø.J., Frisch, K., Duesund, H., Watanabe, K., Nylund, A. (2017) Concurrent jellyfish blooms and tenacibaculosis outbreaks in Northern Norwegian Atlantic salmon (Salmo salar) farms. PLOS ONE. 12(11): e0187476. The article is available at: http://hdl.handle.net/1956/18141 Paper III: Småge, S.B., Frisch, K., Vold, V., Duesund, H., Brevik, Ø.J. Hetlelid Olsen, R., Sjaatil, S.T., Klevan, A., Brudeseth, B., Watanabe, K., Nylund, A. (2018) Experimentally induced tenacibaculosis in Atlantic salmon smolts using Tenacibaculum finnmarkense. Aquaculture, 495, 858 -864. The article is available at: http://hdl.handle.net/1956/19439 http://hdl.handle.net/1956/19440 cristin:1645659 |
op_rights |
Copyright the author. All rights reserved |
_version_ |
1766361555729907712 |