sp. nov., a fish pathogenic bacterium of the family isolated from Atlantic salmon

A novel Gram-stain negative, aerobic, non-flagellated, rod-shaped gliding bacterial strain, designated HFJ, was isolated from a skin lesion of a diseased Atlantic salmon ( 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 (family , phylum ). Strain HFJ exhibits high 16S rRNA gene sequence similarity values to NCIMB 14598 (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 C ω7c and/or iso-C 2-OH), iso-C, anteiso-C iso-C and iso-C 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, NCIMB 14598 and NCIMB 13127. These data, as well as phylogenetic analyses, suggest that strain HFJ should be classified as a representative of a novel species in the genus , for which the name sp. nov. is proposed; the type strain is HFJ  = (DSM 28541 = NCIMB 42386).