2005年4月初,一养殖户来我处求诊。他养殖的鲤鱼成鱼,近期出现不吃食并有死亡现象。死亡量不大,发病初期,三四天死亡一尾,近几天一天死2～3尾。此病已有一月有余。曾按肠炎病治疗,用过消毒剂外泼3～4天,内服甲砜霉素5天,死鱼并没减少,病情不见减轻。死鱼可见鱼体发黑,腹部膨大, In early April 2005, a farmer came to visit our office. His breeding carp into adults, the recent emergence of eating and death. The amount of death is not large, the early stages of illness, three or four days of death a tail, died in days 2 to 3 in recent days. The disease has more than one month. According to the treatment of enteritis, used disinfectant outside the splashed 3 to 4 days, oral administration of thiamphenicol 5 days, dead fish did not reduce the disease did not reduce. Dead fish visible black fish, abdominal enlargement,