Aetiology of an ulcerative disease in goldfish, Carassius auratus (L.): characterization of the causative agent

. A bacterium resembling Aeromonas salmonicida and determined to be the aetiologic agent of a cutaneous ulcerative disease in goldfish Carassius auratus (L.) was further characterized in this study. Forty-five isolates of the bacterium (43 from the United States and one each position (moles % guanine plus cytosine) and DNA homology. The bacteriological atypical A. salmonicida previously described. Several important biochemical characteristics distinguished the goldfish isolates from typical A. salmanicida, but the DNA binding experiments indicated a high degree of relatedness between the goldfish isolates and typical A. salmonicida strains.