Genotyping of Tenacibaculum maritimum isolates from farmed Atlantic salmon in Western Canada

Abstract Mouthrot infections (bacterial stomatitis) have a significant impact on the Atlantic salmon aquaculture industry in Western Canada due to economic losses and fish welfare. Bacteria isolated from lesions in the field have been identified as Tenacibaculum maritimum . Mouthrot is different to...

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Bibliographic Details
Published in:Journal of Fish Diseases
Main Authors: Frisch, K, Småge, S B, Brevik, Ø J, Duesund, H, Nylund, A
Other Authors: Norges Forskningsråd
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2017
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Online Access:http://dx.doi.org/10.1111/jfd.12687
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjfd.12687
https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfd.12687
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Summary:Abstract Mouthrot infections (bacterial stomatitis) have a significant impact on the Atlantic salmon aquaculture industry in Western Canada due to economic losses and fish welfare. Bacteria isolated from lesions in the field have been identified as Tenacibaculum maritimum . Mouthrot is different to classical tenacibaculosis, which is most commonly associated with ulcerative lesions, frayed fins and tail rot. The marine fish pathogen T. maritimum is found worldwide; however, in Western Canada, the knowledge of the genetic profile of T. maritimum is limited. This study looked at increasing this knowledge by genotyping T. maritimum isolates collected from Atlantic salmon from farms in Western Canada. These genotypes were compared to other species of the genus Tenacibaculum , as well as other known sequence types within the species. The Western Canadian isolates belong to two new sequence types within the T. maritimum species. Phylogenetic analysis shows that the isolates form a distinct branch together with T. maritimum NCIMB 2154 T separate from other Tenacibaculum type strains, and they are most closely related to strains from Norway and Chile.