引起南美白对虾发病的细菌种类很多,最常见的是由弧菌引起的疾病。现把常见且危害较重的红腿病、烂鳃病介绍如下1发病情况1.1红腿病 又称败血病,由副溶血性弧菌感染引起。患病对虾厌食,环境恶化时停止摄食,体质下降,多在岸边活动,部分病虾鳃呈黄色且肿胀,有的鳃丝呈黑色,身体微红,透明度增大,附肢全部变红,肝胰脏颜色变浅且轮廓不清,甚至溃烂或萎缩,血淋巴混浊,血细胞不能凝固。该病死亡率相当高,达80％~90％。1.2烂鳃病由哈氏弧菌、副溶血性弧 Many species of bacteria cause the incidence of P. vannamei, the most common being caused by vibriosis. Now the common and more harmful red leg disease, gill disease introduced as follows 1 The incidence of 1.1 red leg disease, also known as septicemia, caused by Vibrio parahaemolyticus infection. Diseased prawn anorexia, deterioration of the environment to stop feeding, physical decline, and more activities in the shore, some sick shrimp gills yellow and swollen, gill filaments and some black, reddish body, increased transparency, appendages all turn red, Hepatic pancreas lighter color and outline is unclear, or even ulceration or atrophy, hemolytic cloudy, blood cells can not be solidified. The mortality rate is quite high, reaching 80% to 90%. 1.2 rotten gill disease by Vibrio harveyi, parahemolytic arc