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However,\n                    <jats:italic>T. finnmarkense<\/jats:italic>\n                    was recently identified as an emerging pathogen. This bacterium was previously described only in Norway, where two genomovars (\n                    <jats:italic>finnmarkense<\/jats:italic>\n                    and\n                    <jats:italic>ulcerans<\/jats:italic>\n                    ) were reported. The present study focuses on the phenotypic and genetic characterisation of isolates recovered from salmonids in Chile to elucidate intraspecific diversity, identify the dominant genomovar, and evaluate pathogenic potential. Thirty\u2010three isolates were analysed through phylogenetic analyses based on the 16S rRNA,\n                    <jats:italic>fusA<\/jats:italic>\n                    , and\n                    <jats:italic>atpA<\/jats:italic>\n                    genes, along with phenotypic characterisation, genotyping by RAPD and ERIC\u2010PCR, and comparative genome analysis. All isolates were confirmed as\n                    <jats:italic>T. finnmarkense<\/jats:italic>\n                    and grouped within the genomovar\n                    <jats:italic>ulcerans<\/jats:italic>\n                    , which was further supported by whole\u2010genome phylogenetic analysis of two representative isolates. Phenotypic characterisation was consistent with the general description of\n                    <jats:italic>T. finnmarkense<\/jats:italic>\n                    from previous studies, although some metabolic variations were observed compared to the homogeneity reported in Norwegian isolates. Genotypic analyses also revealed genetic variability among the presently studied isolates. Pathogenicity was assessed in Atlantic salmon (\n                    <jats:styled-content style=\"fixed-case\">\n                      <jats:italic>Salmo salar<\/jats:italic>\n                    <\/jats:styled-content>\n                    ) through immersion challenge tests under controlled conditions, using isolates obtained from Coho salmon (\n                    <jats:styled-content style=\"fixed-case\">\n                      <jats:italic>Oncorhynchus kisutch<\/jats:italic>\n                    <\/jats:styled-content>\n                    ; SC\u2010T20) and Atlantic salmon (PB\u2010L5). Koch's postulates were confirmed only with the SC\u2010T20 isolate, which caused significant mortality (57.14%) in experimental infections. This study highlights the predominance of genomovar\n                    <jats:italic>ulcerans<\/jats:italic>\n                    in Chilean salmon farming and its varying pathogenic potential. The findings underscore the need to monitor the impacts of tenacibaculosis and to accurately identify the specific etiological agent responsible for skin lesions, particularly in cases of coinfection.\n                  <\/jats:p>","DOI":"10.1111\/jfd.70149","type":"journal-article","created":{"date-parts":[[2026,2,21]],"date-time":"2026-02-21T16:19:14Z","timestamp":1771690754000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Identification, Characterisation, and Pathogenic Potential of Chilean Isolates of\n                    <i>Tenacibaculum finnmarkense<\/i>\n                    Recovered From Coinfection in Farmed Salmonids"],"prefix":"10.1111","volume":"49","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-7194-1715","authenticated-orcid":false,"given":"Valentina","family":"Valencia\u2010Soler","sequence":"first","affiliation":[{"name":"Laboratorio de Patolog\u00eda de Organismos Acu\u00e1ticos y 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