Carnobacterium inhibens sp nov., isolated from the intestine of Atlantic salmon (Salmo salar)

Strain K1(T), isolated from the gastrointestinal tract of Atlantic salmon (Salmo salar), has the capacity to inhibit the growth of the fish pathogens Vibrio anguillarum and Aeromonas salmonicida. Strain K1(T) is a motile Gram-positive psychrophilic rod that lacks both catalase and oxidase, which does not grow on acetate containing media, but grows at pH 9 and in TSB with up to 6% sodium chloride content. Strain K1(T) is facultatively anaerobic and tryptone as a sole source of nutrient promotes growth. The most abundant cellular fatty acid of strain K1(T) is oleic acid (18:1cis9). Based on 16S rDNA sequence comparisons, it is suggested that strain K1(T) is phylogenetically closely related to C. alterfunditum. However, the unique phenotypic attributes of strain K1(T) suggest that it represents a new species. The name Carnobacterium inhibens is proposed, for which the type strain is K1(T)(= CCUG 31728(T)).