1暴发性出血病发病症状:病鱼上浮独游,活力较差,受到惊吓时反映比较迟钝;眼眶有不同程度的出血,病灶部位呈红色或暗红色;鳃丝水肿呈苍白色,有时表现淤血或严重贫血;肛门红肿,腹部膨胀,肠壁充血,肠内充气无食物;腹部膨大,腹腔内有淡黄色或红色混浊腹水,轻压腹部肛门即有淡黄色粘 1 The onset of fulminant hemorrhagic disease symptoms: diseased fish floating alone, poor vitality, frightened when reflected relatively slow; orbital bleeding in varying degrees, the lesion was red or dark red; gill edema was pale, and sometimes congestion Or severe anemia; swelling of the anus, swelling of the abdomen, congestion of the intestine, insufflation of the intestines without food; swollen abdomen, pale yellow or red turbid ascites in the abdominal cavity, soft yellowing of the anus