高体革鯻温和气单胞菌的分离·鉴定及药敏试验

2015-10-21 20:06:01陈言峰冯伟强张辉华陈建酬张绮琼邹记兴付立霞
安徽农业科学 2015年3期

陈言峰 冯伟强 张辉华 陈建酬 张绮琼 邹记兴 付立霞

摘要 [目的] 分离并鉴定患病的高体革鯻(Scortum barco)的致病菌,并研究其药敏特性。[方法] 从濒死的高体革鯻体内分离到2株致病菌(FS1491、FS1492),通过其生理生化特征与16S rDNA序列分析对其进行鉴定;通过人工感染试验测定2株致病菌对高体革鯻的半致死剂量(LD50);最后,通过药敏试验确定其对抗生素的敏感性。[结果] 通过鉴定确定2株致病菌均为温和气单胞菌(Aeromonas sobria),此2株致病菌对高体革鯻的半致死剂量依次为2.1×105和8.5×104 cfu/g。该菌对头孢噻肟、环丙沙星、诺氟沙星和左氟沙星等抗生素高度敏感。[结论] 该研究可为防治温和气单胞菌引起的高体革鯻疾病提供参考。

关键词 高体革鯻;温和气单胞菌;鉴定;药敏试验

中图分类号 S941.42  文献标识码

A  文章编号 0517-6611(2015)03-133-03

Isolation and Identification of Pathogenic Bacteria Aeromonas sobria in Cultured Scortum barco and Their Antibiotic Susceptibility Test

CHEN Yanfeng1, FENG Weiqiang1, ZHANG Huihua1, FU Lixia3* et al

(1. College of Life Science, Foshan University, Foshan, Guangdong 528231; 3. College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu 225009)

Abstract  [Objective] Pathogenic bacteria from diseased Scortum barco were isolated and identified, and their antibiotic susceptibility was studied. [Method] Two pathogenic bacterial strains (FS1491, FS1492) were isolated from moribund Scortum barco, and they were identified through physiological and biochemical characteristics test and 16S rDNA sequence analysis. The half lethal dose (LD50) values for the isolates to Scortum barco were determined by the artificial infection experiment. Besides, the antibiotic susceptibility of the isolates was studied. [Result] These two bacteria were identified to be A. sobria. The LD50 values for the isolates to healthy Scortum barco were 2.1×105 and 8.5×104 cfu/g, respectively. The result of antibiotic susceptibility test showed the isolates were highly susceptible to cefotaxime, ciprofloxacin, norfloxacin, levofloxacin and so on. [Conclusion] This study could provide references to prevent and control the disease of Scortum barco resulted from A. sobria.

Key words  Scortum barco; Aeromonas sobria; Identification; Antibiotic susceptibility test

基金項目 江苏省高校自然科学研究基金(11KJB240002);广东省教育部产学研项目(2010b090400255);广东省大学生创新创业训练计划项目(201411847059);广东省普通高校青年创新人才项目;佛山科学技术学院校级科研项目。

作者简介 陈言峰(1981- ),男,山东潍坊人,讲师,博士,从事淡水养殖鱼类病害研究。*通讯作者,博士,从事水产动物抗逆性研究。

收稿日期 20141208

高体革鯻(Scortum barco),隶属鲈形目(Percifbrmes),鯻科(Theraponidae),革鯻属(Scortum),俗称宝石鲈、宝石鱼、翡翠鱼等,是我国从澳大利亚引进的一种优良的淡水经济鱼类。该鱼具有生长速度快、食性杂和适应性强等优良养殖性状,且肉味鲜美,骨刺少,蛋白质含量高,具有较高的经济价值和广阔的养殖前景[1]。然而,随着集约化高密度养殖规模的不断扩大,高体革鯻的细菌性疾病日益严重,目前已有迟缓爱德华氏菌[2]、无乳链球菌[3]及海豚链球菌[4]引发的高体革鯻病害的报道。……

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