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1 细菌性疾病主要是弧菌病,病原为副溶血弧菌（vibrio para-hemolyticus）或溶藻弧菌（Vibrio alginolyticus）,它们均为弧菌科,弧菌属。两者症状和防治方法都比较相似。副溶血弧菌引起的症状为:患病初期,病鱼食欲下降,游动迟缓,平衡失调,体表皮肤有淤斑,鳃浅红色,腹部膨大,肛门红肿;解剖濒死病鱼发现肝、脾、肾、肠均充血,肝脏肿大呈土黄色,肠道内有黄色粘液。治疗:根据大黄鱼的发病情况,在饵料中掺入庆大霉素或土霉素、卡那霉素、丙氟哌酸（环丙沙星）等抗菌药物,用量为投饵量的1％～3％,连续投饵5天。待大黄鱼食欲
Vibrio para-hemolyticus or Vibrio alginolyticus, all of which are Vibrio, Vibrio. Both symptoms and prevention methods are more similar. The symptoms caused by Vibrio parahaemolyticus are as follows: early stage of illness, decreased appetite of diseased fish, slow swimming, balance disorders, ecchymosis of surface skin, light red gill, swollen belly and anal swelling; dissection of dying fish, liver, Spleen, kidney, intestine congestion, liver swelling was yellow, intestinal mucus yellow. Treatment: According to the incidence of large yellow croaker in the feed mixed with gentamicin or oxytetracycline, kanamycin, propionate (ciprofloxacin) and other antibacterial drugs, the amount of feeding 1% ~ 3%, continuous feeding 5 days. To be big yellow fish appetite