Abstract:
:Results of previous multilocus sequence and whole-genome-based analyses have suggested that a homogeneous group of isolates belonging to the genus Tenacibaculum, represented by strain TNO020T and associated with skin ulcer development in sea-farmed fish, represents an as-yet-undescribed species. Comparative whole-genome analysis performed in the present study clustered five isolates, including TNO020T, in a distinct lineage within the genus Tenacibaculum. Phenotypic differences, high intra-cluster average nucleotide identity (ANI) values and low ANI values with other Tenacibaculum species support the proposal of a novel species, for which we propose the name Tenacibaculum piscium sp. nov. with strain TNO020T (=CCUG 73833T=NCIMB 15240T) as the type strain. Further, large-scale genome analyses confirmed the existence of two different phylogenetic lineages within 'T. finnmarkense', a species effectively but not validly published previously. ANI values just above the species delineation threshold of 95-96 % confirmed that both lineages belong to the same species. This result was also supported by DNA-DNA hybridization values. Phenotypically, the two conspecific lineages are distinguishable by differences in growth temperature range and ability to degrade l-proline. For the group of isolates already commonly known as 'T. finnmarkense', we propose the name Tenacibaculum finnmarkense sp. nov., with strain TNO006T (=CCUG 73831T=NCIMB 15238T) as the type strain. We further propose the subdivision of T. finnmarkense sp. nov. into two genomovars, T. finnmarkense genomovar finnmarkense with strain TNO006T (=CCUG 73831T=NCIMB 15238T) as the type strain and T. finnmarkense genomovar ulcerans with strain TNO010T (=CCUG 73832T=NCIMB 15239T) as the type strain.
journal_name
Int J Syst Evol Microbiolauthors
Olsen AB,Spilsberg B,Nilsen HK,Lagesen K,Gulla S,Avendaño-Herrera R,Irgang R,Duchaud E,Colquhoun DJdoi
10.1099/ijsem.0.004501subject
Has Abstractpub_date
2020-12-01 00:00:00pages
6079-6090issue
12eissn
1466-5026issn
1466-5034journal_volume
70pub_type
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