“白点病”是多子小瓜虫寄生在鱼体表、鳃等部位形成的以白色规则胞囊为特征的象形病征,该病是一种世界性广泛流行的鱼类原虫病,各地均有流行,对宿主无选择性,各种淡水鱼均可受其寄生,无鳞鱼易感,具有暴发突然、扩展迅速、危害性强、难以治疗的特点。斑点叉尾体表光滑无鳞,食料选择余地大,钓饵容易解决,上钩率高,具有一定的消费市场和垂钓市场,近年来,由于鲫鱼“鳃出血”病的流 “White spot disease ” is a hieroglyphic parasitic disease in the fish body surface, gills and other parts of the formation of white regular cysts characterized by the hieroglyphic disease, the disease is a worldwide pandemic fish protozoal disease , All over the world are popular, no selectivity to the host, all kinds of freshwater fish can be parasitic, without scales fish susceptible, with a sudden outbreak, rapid expansion, harmful and difficult to treat characteristics. Forks tail  body smooth and scale-free, food choice is large, bait easy to solve, the hook rate is high, with a certain consumer market and fishing market, in recent years, due to crucian carp “gill bleeding” disease flow