›› 2013, Vol. 40 ›› Issue (10): 228-230.

• 疾病防治 • 上一篇    

早春季节罗非鱼源嗜水气单胞菌的分离鉴定

左跃1, 易弋1, 夏杰1, 罗福广2, 杨军2,3, 李方方1, 伍时华1   

  1. 1. 广西工学院生物与化学工程系, 广西柳州 545006;
    2. 柳州市渔业技术推广站, 广西柳州 545006;
    3. 国家罗非鱼产业技术体系柳州综合试验站, 广西柳州 545006
  • 收稿日期:2013-03-27 出版日期:2013-10-20 发布日期:2013-12-19
  • 通讯作者: 易弋 E-mail:yiyi_shx@gxut.edu.cn
  • 作者简介:左跃(1986-),男,河北人,硕士生,研究方向:鱼类病原微生物学。
  • 基金资助:
    广西科技重大专项项目(桂科攻1123006-3);现代农业产业技术体系专项资金项目(CARS-49)。

Isolation and Identification of Aeromonas hydrophila from Infected Tilapia in Early Spring

ZUO Yue1, YI Yi1, XIA Jie1, LUO Fu-guang2, YANG Jun2,3, LI Fang-fang1, WU Shi-hua1   

  1. 1. College of Biological and Chemical Engineering, Guangxi University of Technology, Liuzhou 545006, China;
    2. Liuzhou Fishery Technical Extension Station, Liuzhou 545006, China;
    3. Liuzhou Comprehensive Experiment Station of the National Tilapia Industry Technology System, Liuzhou 545006, China
  • Received:2013-03-27 Online:2013-10-20 Published:2013-12-19

摘要: 2012年早春季节广西柳州市某罗非鱼养殖场出现暴发性疾病,从患病罗非鱼的肝脏、肾脏和脾脏组织中分离到1株革兰氏阴性杆菌。通过生理生化试验和16S rDNA序列分析,鉴定该菌为嗜水气单胞菌。人工感染试验结果显示,分离菌株对罗非鱼有很强的毒力,该菌注射浓度为1×109 CFU时,可使健康罗非鱼在24 h内全部死亡;药物敏感试验结果显示,分离菌株仅对氨苄西林耐药,对氨曲南、氧氟沙星等15种抗生素敏感。本研究为早春季节罗非鱼疾病防控提供试验依据。

关键词: 罗非鱼; 嗜水气单胞菌; 强毒力; 早春季节

Abstract: In early spring 2012, a disease outbreak occurred at a tilapia farm in Liuzhou of Guangxi province. A gram-negative bacillus was isolated from liver,kidney and spleen of infected tilapia. The isolate was identified as Aeromonas hydrophila by biochemical assays and 16S rDNA sequencing. Healthy tilapia injected with 1×109 CFU of the isolate reached a mortality of 100% in just 24 h. Drug sensitivity experiment showed that the isolate was only resistant to ampicillin and sensitive to 15 types of antibiotics such as aztreonam,ofloxacin,etc. This study provided a basis for the prevention and control of tilapia diseases in early spring.

Key words: tilapia; Aeromonas hydrophila; strong virulence; early spring

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