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此病是1977年11月开始确定为养殖香鱼的流行病.此后,只有零星的发病.但1980年6月以来,发现在日本全国大量发生.有效的治疗方法还没确定,需要加以研究解决.本病的流行,从夏季一直到秋季,起初仅在养殖水温较高的养殖场发现.但至今年,在环境条件不同的各种养鱼池都有发现.症状,病鱼游泳缓慢,离开群体独游;严重的病鱼无力地浮在排水口附近的水面,不久就死去.体表上能看到鳃盖发红及充血,腹部点状出血和肛门周围发红、隆起、开口以及尾柄后端充血等症状;经常可以看到眼球异常(眼球突出和眼球内出血).如果解剖检查,就能看到除腹腔壁出血并积聚着黄红色(橙色——译者注)的混浊的腹水外,
The disease was identified as an epidemic of cultured sweetfish in November 1977. Since then, only sporadic disease has occurred, but it has been found in large numbers throughout Japan since June 1980. Effective treatments have not been established and need to be addressed The prevalence of the disease, from summer to autumn, was initially found only on farms where the breeding water temperature is high, but so far this year has been found in various fish ponds with different environmental conditions. Swim alone group; serious diseased fish floating weakly in the water near the drain, and soon died .Grilled on the surface can see gill cover redness and congestion, abdominal punctate bleeding and redness around the anus, uplift, opening and tail Handle the back of the congestion and other symptoms; often can see the eye abnormalities (eyeballs and eyeballs bleeding.) If the anatomy, you can see in addition to the abdominal wall bleeding and accumulation of yellow-red (orange - translator’s note) cloudy ascites outer,