欧洲鳗养殖过程中,在黑仔及幼鳗期易发生头部充血发红的疾病,常称为红头病。该病蔓延速度迅速、死亡率高,与狂游病称为欧洲鳗养殖中两大杀手。 该病主要流行于高密度养殖的精养池。土池养殖的欧洲鳗亦易发生,流行水温为26—28℃,病情发展快,如不及时控制,往往于2—3天内感染整池鳗的30％左右(仅指精养池),在水质偏酸PH值为6.5以下,养殖密度高的养殖池中尤为严重,近年在养殖日本鳗鲡的黑仔及幼鳗亦发现该病。 European eel farming process, prone to blackheads and elvers prone to head congestion and redness of the disease, often referred to as red head disease. The rapid spread of the disease, high mortality, and madness called the two killer European eel farming. The disease is mainly popular in high-density breeding pool. European ponds eel farming is also prone to epidemic, the prevalence of water temperature is 26-28 ℃, the rapid development of the disease, if not controlled in time, often within 2-3 days infected with about 30% of the entire pool of eels (only refers to the intensive pool), water quality Partial acid PH value of 6.5 below the breeding density of aquaculture ponds is particularly serious in recent years in the cultivation of Japanese eel black juvenile and juvenile also found the disease.