１９９３年东海地区的养殖对虾发生严重的暴发性流行病，病情发展迅猛，死亡率高。在一个养虾塘中，从发现摄食量减少到大批死亡仅２～３ｄ；少数虾塘，疾病表现为亚急性的，每天死亡一些，可延续半个月以上，最终大部分死亡。采用各种药物均无法控制病情的发展。疾病流行面很 In 1993, the shrimp farming in the East China Sea had a serious outbreak of epidemic disease. The disease developed rapidly and the mortality rate was high. In a shrimp pond, the number of deaths was reduced from 2 to 3 d after the discovery of food intake. In a few shrimp ponds, the disease manifested as subacute and some died each day, which lasted for more than half a month and eventually died. Using a variety of drugs are unable to control the development of the disease. Disease epidemic surface is very