2005年七、八月份,乐亭、滦南一带多家工厂化牙鲆养殖场发生刺激隐核虫病,此种病虫害发病急、传染快、死亡率高。发生过该病的养殖场牙鲆死亡率一般都在50%~80%之间,这种病害给牙鲆养殖业带来很大损失。1病症首先发现牙鲆鱼摄食不积极或停止摄食,水表面有一层粘沫出现,鱼群开始 July and August 2005, Laoting, Luannan a number of factories around the turbot plover farm stimulation occurs, the incidence of such pests and diseases, rapid transmission, high mortality. Occurrence of the disease farms mortality of Japanese flounder are generally between 50% to 80%, this disease to the Japanese flounder breeding industry has brought great losses. 1 disease first found flounder fish feeding is not active or stop feeding, there is a layer of foam on the surface of water, fish began