A Brown Pigment-producing Strain of Pseudomonas plecoglossicida Isolated from Ayu with Hemorrhagic Ascites

• Published in: Fish Pathology Vol. 35; no. 2; pp. 91 - 92
• Main Authors: Park, Se Chang, Shimamura, Ichiro, Hagihira, Masaru, Nakai, Toshihiro
• Format: Journal Article
• Language: English
• Published: The Japanese Society of Fish Pathology 2000
• Subjects: ayu; bacterial hemorrhagic ascites; brown pigment; Marine; Plecoglossus altivelis; Pseudomonas plecoglossicida; INW, Japan, Shikoku, Tokushima Prefect
• ISSN: 0388-788X; 1881-7335
• DOI: 10.3147/jsfp.35.91

Bacterial hemorrhagic ascites causing mass mortalities has spread among cultured population of ayu Plecoglossus altivelis in Japan. The causative becterium of the disease is closely related to Pseudomonas putida but differs from it in some biochemical characteristics and a new species name P. plecoglossicida was proposed for the bacterium on the basis of phenotypic characteristics, 16S rRNA gene analysis and DNA-DNA hybridization. During epidemiological research work of the disease in Tokushima Prefecture, Japan, in 1999, we isolated a phenotypic variant of P. plecoglossicida which produces brown diffusible pigment on agar plate. This paper describes isolation and characterization of the brown pigment-producing strain of P. plecoglossicida.