Tenacibaculum finnmarkense sp. nov., a fish pathogenic bacterium of the family Flavobacteriaceae isolated from Atlantic salmon
Småge, Sverre Bang | Brevik, Øyvind Jakobsen | Duesund, Henrik | Ottem, Karl Fredrik | Watanabe, Kuninori | Nylund, Are
A novel Gram-stain negative, aerobic, non-flagellated, rod-shaped gliding bacterial strain, designated HFJᵀ, was isolated from a skin lesion of a diseased Atlantic salmon (Salmo salar L.) in Finnmark, Norway. Colonies were observed to be yellow pigmented with entire and/or undulating margins and did not adhere to the agar. The 16S rRNA gene sequence showed that the strain belongs to the genus Tenacibaculum (family Flavobacteriaceae, phylum ‘Bacteroidetes’). Strain HFJᵀ exhibits high 16S rRNA gene sequence similarity values to Tenacibaculum dicentrarchi NCIMB 14598ᵀ (97.2 %). The strain was found to grow at 2–20 °C and only in the presence of sea salts. The respiratory quinone was identified as menaquinone 6 and the major fatty acids were identified as summed feature 3 (comprising C₁₆:₁ ω7c and/or iso-C₁₅:₀ 2-OH), iso-C₁₅:₀, anteiso-C₁₅:₀, iso-C₁₅:₁ and iso-C₁₅:₀ 3-OH. The DNA G+C content was determined to be 34.1 mol%. DNA–DNA hybridization and comparative phenotypic and genetic tests were performed with the phylogenetically closely related type strains, T. dicentrarchi NCIMB 14598ᵀ and Tenacibaculum ovolyticum NCIMB 13127ᵀ. These data, as well as phylogenetic analyses, suggest that strain HFJᵀ should be classified as a representative of a novel species in the genus Tenacibaculum, for which the name Tenacibaculum finnmarkense sp. nov. is proposed; the type strain is HFJ ᵀ = (DSM 28541ᵀ = NCIMB 42386ᵀ).
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