Isolation of oxidase-negative Aeromonas salmonicida from diseased turbot Scophthalmus maximus

The first outbreak of dlsease due to an atyplcal Aeromonas salmonicida among turbot Scophthalmus maximus (L.) in Denmark is reported.The causal organism was oxidase-negative, non-pigmented, and slow-growing.Additionally it differed from the typical strains in a number of biochemical characters.The mortality among turbot in the farm was high but was responsive to antlmlcrobial therapy.