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(一)白点病 病原为刺激隐核虫。系纤毛虫类寄生虫,虫体椭圆形,多寄生于病鱼体表和鳃丝上。病鱼粘液分泌增多,表皮细胞增生,包裹虫体,形成白色的囊,肉眼看上去成了白点。病情严重时鳞片脱落,体表点状充血。有的一侧或两侧瞎眼。该病一般发生在初夏或夏末初秋,
(A) white spot disease is to stimulate Cryptocaryon. Department of ciliates parasites, parasites oval, parasitic disease in fish body surface and gill wire. Sick fish increased mucus secretion, epidermal cell proliferation, worm body, forming a white capsule, the naked eye appears to have become a white spot. Sick when the scales fall off, body surface punctate hyperemia. Some are blind on one or both sides. The disease usually occurs in early summer or early summer autumn,