1995年3月至1997年2月，我们多次从病鳗的鳃、肝、肾、腹水病料中同时检出柱状噬胞菌和迟缓爱德华氏菌，对其生物学特性和病原学进行了初步研究，现报告如下：1病鳗症状初期鳗鱼摄食下降，傍晚和夜间在水面上无力逆游晃动或紧贴池壁或挂在食台上，反应迟钝，2天后每池有死鳗20 March 1995 to February 1997, we repeatedly from eel gill, liver, kidney, ascites disease material at the same time detect the bacteriostasis of Pichia and slow Edwardsiella, its biological characteristics and etiology Preliminary studies, the report is as follows: 1 eel eel symptoms decreased early feeding, evening and night swimming in the water on the surface weakness or swim against the wall or hung on the table, unresponsive, dead eel 20 days after each pool 20