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Abstract

Gram-negative bacteria, similar in 16S rRNA gene sequence to , have been irregularly cultured from diseased Atlantic salmon () sea-farmed in Norway since the 1980s and more commonly in later years from diseased lumpfish () farmed in the northeast Atlantic area. Phenotypic and genetic analyses confirmed that the majority of Norwegian isolates in the present study, cultured from both salmon and lumpfish, are closely related to, yet distinct from, and represent a hitherto undescribed species. We further argue, based on genetic similarity levels, that the original placement of within was erroneous and that this species belongs within , as comb. nov. Accordingly, we propose the name sp. nov. for the new species characterized here. Furthermore, this species separates into two genetically and phenotypically distinct lineages, respectively, associated with Atlantic salmon and lumpfish, and for which we propose the names subsp. subsp. nov. and subsp. subsp. nov., respectively. The type strain for subsp. subsp. nov. is strain NVIB3624 (NCIMB 15512, CCUG 77520), and the type strain for subsp. subsp. nov. is strain NVIO9100 (NCIMB 15511, CCUG 77521).

Funding
This study was supported by the:
  • Fiskeri - og havbruksnæringens forskningsfond (Award 901680)
    • Principle Award Recipient: DuncanJ Colquhoun
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License.
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/content/journal/ijsem/10.1099/ijsem.0.006729
2025-04-09
2025-04-27
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