一、病原此病主要危害鲤鱼及四大家鱼，初步认为是水型点状极毛杆菌，菌体短杆状，近圆形，单个排列。有运动力，无芽孢，革兰氏阴性。二、症状与病变病鱼体表粗糙，部分鳞片（多数在体后部）向外张开象松球，鳞基部水肿，其内部积聚着半透明或含血的渗出液，以至鳞片竖起。用 First, the pathogen The disease mainly endanger the carp and the four major domestic fish, initially considered to be water-point Polette bacteria, short rod-shaped bacteria, nearly circular, a single arrangement. Athletic, non-spore, Gram-negative. Second, the symptoms and diseases Fish rough body surface, part of the scales (mostly in the rear part of the body) flared like a ball of pine, squamous base edema, its internal accumulation of translucent or blood exudate, and scales erected. use