Hajime Arai; Yukio Morita; Kunihiro Nobusawa; Masanao Arai; Sumalee Boonmar; Hirokazu Kimura. Prevalence of Flavobacterium psychrophilum Infection in Ayu (Plecoglossus altivelis) in Gunma Prefecture, Japan and Comparison of the gyr B Sequences of Isolates. Agr. Nat. Resour. 2004, 38, 523-530.