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时间:2019-11-22
《海洋蛭弧菌的分离鉴定及其对副溶血弧菌的作用》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、JAN20,2009,36(1):20-24©2009byInstituteofMicrobiology,CAS微或物修通报Microbiologytongbao@im.ac.cn罚究报告海洋蛭弧菌的分离鉴定及其对副溶血弧菌的作用储卫华I*朱卫'康春涛2(1.中国商科大学生命科学与技术学院江苏南京210009)(2.江苏星海动物药业科技有限公司江苏东台224233)摘要:蛭弧菌广泛存在于自然水体,具有噬菌的特性,对水体中细菌数量控制具调节作用。以副溶血弧菌为宿主菌,利用双层琼脂法,从海洋水体中分离出15株具有噬菌作用的细菌,对形成噬菌斑能力最强的1株
2、菌株进行特异性16SrDNA扩增,确认为蛭弧茵,命名为Bd-MLBd-Ml对大多数海水养殖动物病原菌有裂解作用,裂解率在90%(20/22)以上,模拟水环境实验发现,蛭弧菌对副溶血弧茵有较强的裂解和净化作用,102h内能使副溶血弧菌从3.0xl08CFU/mL下降到8.7xl03CFU/mL。动物实验表明蛭弧菌能有效预防对虾弧菌病的发生,表明蛭弧菌有望成为水产动物疾病防治的一种有效的生物制剂。关键词:副溶血弧菌,蛭弧茵,对虾,生物防治Isolation,IdentificationofMarineBdellovibriosandItsEffecton
3、VibrioparahaemolyticusCHUWei-Hua1*ZHUWei1KANGChun-Tao2(1.DepartmentofMicrobiology.SchoolofLifeScience&Technology.ChinaPharmaceuticalUniversity,Nanjing,Jiangsu210009,China)(2.JiangsuXinghaiVeterinaiyPharmaceuticalCo.、Ltd“Dongtai,Jiangsu224233,China)Abstract:Bdellovibriosarcoblig
4、atepredatorybacteria,widelydistributeinnatureandregulatethecountsofbacteriuminwater.FifteenstrainsofpredatorybacteriawereisolatedfrommarineenvironmentusingVibrioparahaemolyticusDX-1ashostandoneofthemformedlargeplaquesdesignatedasBd-M1.ThestrainwasconfirmedbyBdellovibriospecies-
5、specific16SrDNAfragmentamplifiedusingPCRmethod.Determinationofhostrangeonspeciesoffishpathogenicbacteria(Vibrioparahaemolyticus,Vibrioalginolyticus^Vibrioan^uillarmn.Vibrioanguillarum.VibriovulnificusandEdwardsiellatarta)indicatedthatBd-Mlwasabletoparasitize20strainsoutofatotal
6、of22tested.Co-cultureexperimentshownthatBd-MlhavepurificationfunctiononVibrioparahaemolyticus,thenumberofVparahaemolyticusdecreasedfrom3.Ox108CFU/mLto8.7x1()'CFU/mLduring102h.ImmersionPenaeusvannatneiinwateratdifferentconcentrationofBd-Mlwasusedinprotectionagainstexperimentalin
7、fectionwithV.parahaemolyticusDX-1infection.ResultsshownthatthemortalityofgroupsbathedwithBd-MlwaslowerthanthatgroupwithoutBd-M1.Theseresultssuggestthatitmaybepossibletousebdellovibriotocontrolfishdisease・Keywords:Vibrioparahaemolyticus,Bdellovibrios.Penaeusvannamei,Bio-therapy水
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