1989年6月上句至8月中旬,江苏省溧阳县暴发了一种出血性鱼病,涉及该县14个乡镇渔场和养鱼户的鱼池,发病鱼类主要是白鲫、鳊鱼,有的鱼池中,鲢鳙鱼及其他鱼类也发病。这次鱼病来势猛、范围广。我们对10个渔场和3户养鱼户的鱼病发生情况进行了调查,病鱼症状主要是口腔、鳃盖骨或眼睛出血、体表鳞片鳍条等多处充血发炎、肛门红肿突出、皮下出血、肌肉呈鲜红色、有的鱼鳃丝肿胀、粘液增多或肝脏发白或有腹水;发病鱼池水深从0.8米至2米,多数为1～1.5米,池底淤泥厚30～50厘米,已养鱼5～10年;5～7月的气象特点是日平均气温 From June 1989 to the middle of August 1989, a hemorrhagic fish disease outbreak was reported in Liyang County, Jiangsu Province. It involved fish ponds of fish farms and fish farms of 14 towns and villages in the county. The main fish diseases were white carp and bighead carp, Of fish ponds, silver carp and bighead carp and other fish are also sick. This fish disease is fierce, a wide range. We investigated the incidence of fish diseases in 10 fisheries and 3 fish farmers. Symptoms of diseased fish mainly included oral cavity, opercleal or eye bleeding, multiple squamous and inflamed skin flaps, prominent anal swelling, subcutaneous Bleeding, muscle was bright red, and some fish gill filament swelling, mucus increased or liver white or ascites; incidence of fish pond water depth from 0.8 to 2 meters, most of 1 to 1.5 meters, the bottom of the mud thickness of 30 to 50 cm, Have fish 5 to 10 years; 5 July weather is characterized by the average daily temperature