Abstract

A novel Gram-negative, aerobic, motile, rod-shaped, beige-pigmented bacterium, strain ARW1-2F2T, was isolated from a seawater sample collected from Roscoff, France. Strain ARW1-2F2T was catalase-negative and oxidase-positive, and grew under mesophilic, neutrophilic and halophilic conditions. The 16S rRNA sequences revealed that strain ARW1-2F2T was closely related to Arcobacter lekithochrous LFT 1.7T and Arcobacter caeni RW17-10T(95.8 and 95.5 % gene sequence similarity, respectively). The genome of strain ARW1-2F2T was sequenced and had a G+C content of 28.7%. Two different measures of genome similarity, average nucleotide identity based on blast and digital DNA-DNA hybridization, indicated that strain ARW1-2F2T represents a new Arcobacter species. The predominant fatty acids were C16 : 1 ω7c/C16 : 1 ω6c and C18 : 1 ω7c/C18 : 1 ω6c. The results of a polyphasic analysis supported the description of strain ARW1-2F2T as representing a novel species of the genus Arcobacter, for which the name Arcobacter roscoffensis sp. nov. is proposed with the type strain ARW1-2F2T (DSM 29169T=KCTC 52423T).

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