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1994年黄河中下游地区的孟津县、济源市、孟县、巩义市一带,发生白鲢暴发病,因误诊或不确诊而造成大面积死亡,仅孟津县的466.67公顷,死鱼20多万公斤,损失近百万元。经检验发现鲢、鳙鱼体内有复口吸虫幼虫。 复口吸虫隶属扁形动物门,吸虫纲,复殖亚纲。吸虫的生活史如图所示。
In 1994, middle and lower reaches of the Yellow River in Mengjin County, Jiyuan City, Meng County, Gongyi City area, the occurrence of silver carp outbreak, misdiagnosed or not diagnosed and caused a large area of deaths, only Mengjin County, 466.67 hectares, dead fish more than 200000 kilograms , Lost nearly one million yuan. After the test found silver carp, bighead carp lupus larvae in vivo. Fungi hookworm belonged to flat animal door, Trematoda, Coptis subclass. Trematodes life history as shown.