Vibrio sp. J383 Genome sequencing. Vibrio sp. J383

Winter ulcer disease (WUD) is a recalcitrant issue in the salmon farming industry, usually caused by Moritella Viscosa. Although different types of polyvalent vaccines are used against this pathogen, WUD outbreaks are continuously reported in Atlantic Canada. Currently, it is unknown whether undescribed bacterial pathogens are also causing WUD in vaccinated farmed Atlantic salmon (Salmo salar), or the effectiveness of current vaccines is not sufficient. In this study, we described the phenotype and genomic characteristics of a new pathogen (Vibrio sp J383) isolated from internal organs of Atlantic salmon displaying clinical signs of WUD. This study introduced a new strain that causes winter ulcer disease in Atlantic salmon and highlighted the role of unknown pathogenic strains in this disease.