For the reduction of mortality due to furunculosis disease caused by Aeromonas salmonicida in Atlantic salmon (Salmo salar) .

Immunity develops progressively after vaccination, the rate being dependant upon water temperature. At 12°C, a minimum of 28 days should be allowed between vaccination and anticipated exposure to infection. For general guidance, a period equivalent to 400 degree days should be allowed for development of optimum immunity. Duration of immunity has been demonstrated under field conditions for at least 5 months after vaccination.