长三角地区罗氏沼虾成虾主要疾病的病原研究

2009年8月-2010年8月在长三角地区开展了罗氏沼虾(Macrobrachium rosenbergii)成虾主要疾病的流行病学调查.结果显示:所采集病样按其症状分为肌肉白浊病(以上海和浙江病样为主)、蓝体病(以江苏病样为主)、红体病(以浙江病样为主)三类.从采集的罗氏沼虾病样中分离到优势细菌11株,人工感染健康罗...

Studies on the main pathogens of adult prawn(Macrobrachium rosenbergii)in the Yangtze River Delta region

An investigation on the diseases of adult prawn(Macrobrachium rosenbergii) had been conducted from August 2009 to August 2010 in farms in the Yangtze River Delta region.The symptoms found in various localities,which were mainly divided into three categories:Shanghai and Zhejiang disease sample has pale body color,especially the tail with white spots;Jiangsu disease sample mainly has blue body-color and blue muscle;Zhejiang disease sample has red body-color,and reddish hepatopancreas.11 strains of dominant bacteria were isolated from the disease samples of M.rosenbergii,and 3 main pathogenic bacteria were selected by infecting healthy M.rosenbergii artificially,namely SHB1,GYB8,HZL2.After morphological,physiological and biochemical properties and 16SrRNA identification,the 3 bacteria were determined as Aeromonas hydrophila,Citrobacter freundii,Proteus vulgaris.Conventional drug susceptibility tests showed that the 3 main pathogenic bacteria and other isolated bacteria had high sensitivity to ciprofloxacin and enrofloxacin.