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《凡纳滨对虾苗空肠空胃病原的分离鉴定及药敏试验.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、南方农业学报JournalofSouthernAgriculture2016,47(3):506-510ISSN2095—1191;CODENNNXAABhttp://wM'w.Mnyxb.comDOI:10.3969/j:issn.2095—1191.2016.03.506凡纳滨对虾苗空肠空胃病原的分离鉴定及药敏试验张彬,何苹萍,黄婷,陈福艳,谢达祥,陈晓汉+(广西水产科学研究院/广西水产遗传育种与健康养殖重点实验室,南宁530021)摘要:【目的】对伴有空肠空胃症状的发病凡纳滨对虾苗进行病原分离鉴定及药
2、敏试验,为有效防治对虾早期死亡综合症(EMS)及开展相关领域研究提供基础资料。【方法】以常规方法进行患病虾苗病原菌分离,通过透射电镜观察、Vitek2GN全自动细菌鉴定系统及16SrRNA序列扩增等进行病原菌鉴定,并以K.B纸片扩散法进行药敏试验。【结果】从患病虾苗中分离获得2株优势菌株(HTWl40601和HTWl40602),根据分离菌株的菌体形态、生理生化特性及16SrDNA序列分析结果,分别判定为鲍希瓦氏菌(Shewanellahaliotis)和创伤弧菌(Vibriovulnificus)。菌株H
3、TWl40601和HTWl40602对头孢曲松、庆大霉素、氧氟沙星均表现出高度敏感。【结论】创伤弧菌是引起凡纳滨对虾苗空肠空胃的致病菌,实际生产中可选用头孢曲松、庆大霉素、氧氟沙犀进行防治。关键词:凡纳滨对虾;虾苗;创伤弧菌;鲍希瓦氏菌;分离鉴定;药敏试验中图分类号:$945.46文献标志码:A文章编号:2095—1191(2016)03—0506—05Isolation,identificationanddrugsensitivitytestofpathogenycausingemptystomachan
4、dintestineofLitopenaeusvannameilarvaeZHANGBin,HEPing-ping,HUANGTing,CHENFu-yan,XIEDa-xiang,CHENXiao—han+(GuangxiAcademyofFisheriesScienceBuangxiKeyLaboratoryofAquaticGeneticBreedingandHealthyAquaculture,Nanning530021,China)Abstract:【Objecdvellnordertoprovi
5、debasicdataforeffectivelycontrollingearlymortalitysyndrome(EMS)ofprawnandstudyingotherrelatedfields,thepathogencausingemptystomachandintestineofLitopenaeusvannameilarvaewasisolatedandidentified,anditsdrugsensitivitywastested.【MethodlThestrainswereisolatedf
6、romdiseasedshrimplarvaebyconventionalmethod,andidentifiedbytraditionalbacterialidentificationmethods.suchasobservationundertransmissionelectronmicroscope,Vitek2GNautomaticbacterialidentifieationsystemandPCRamplificationof16SrRNAsequence.Meanwhile,thesensit
7、ivityofisolatedstrainstodrugsweretestedbyKirby—Bauerdiscdiffusionmethod.【Result]Twodominantstrains(HTWl40601,HTWl40602)hadbeenisolatedfromdiseasedshrimplarvae,andwhichwereidentifiedasShewanellahaliotisandVibriovulnifiOUS.respectively.Furthermore.StrainHrWl
8、40601andHTWl40602werehighlysensitivetoceftriaxone,gentamicinandofloxacin.【Conclusion】矿vulnificusispathogencausingemptystomachandin-testineofL.vannameilarvae.Furthermore,ceftriaxone,gentamicin,andofioxacinshou
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