High Mortality Due to Tetrahymena sp. Infection in Laboratory-Maintained Zebrafish (Brachydanio rerio)

Astrofsky Keith M.; Schech Joseph M.; Sheppard Barbara J.; Obenschain Christopher A.; Chin Amy M.; Kacergis Michael C.; Laver Elizabeth R.; Bartholomew John L.; Fox James G.

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High Mortality Due to Tetrahymena sp. Infection in Laboratory-Maintained Zebrafish (Brachydanio rerio)

机译：由于四膜虫（Tetrahymena sp。）实验室维护的斑马鱼（Brachydanio rerio）中的感染

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Alargecolonyoflaboratoryzebrafish(Brachydaniorerio)usedinthestudyofearlyvertebrateembryogenesisbeganexperiencingacute,unexplainedmortalitythatapproached100%amongapproximately30-day-oldresidentfry.Theinitialdifferentialdiagnosisincludedammonia,nitrite,orchlorinetoxicosis,aswellasiatrogenicallyinducedtoxicosisassociatedwithimpropersanitationproceduresoflaboratoryequipment.Necropsyofdeadandmoribundfrypriortofixationrevealedswarmsofovoid-shaped,motile,ciliatedprotozoawitha"spiralingfootball"motion.Wetmountpreparationsofvariouswatersamplesalsocontainedhighnumbersofsimilarprotozoa.Histologicexaminationofaffectedfryrevealednumerous,periodicacid-Schiff-positiveformswithinthebodycoelom,andepithelialandmuscletissues.TheprotozoawereconsistentmorphologicallywithmembersofthegenusTetrahymena,whichisusuallyafree-living,nonpathogenicciliatedprotozoainfreshandsaltwaterenvironments.RelevantdiseaseassociatedwithTetrahymenaspp.inviviparousfishhasbeenreportedasaresultofconcurrentdisease,immunosuppression,orpoorwaterqualityconditions.Totheauthors'knowledge,thisisthefirstreportofanepizooticinvolvinglaboratorymaintainedzebrafish,andthediagnosticcourseandtherapeuticinterventionsundertakentoalleviateTetrahymenaspecies-associatedclinicaldisease.

机译：Alargecolonyoflaboratoryzebrafish（Brachydaniorerio）usedinthestudyofearlyvertebrateembryogenesisbeganexperiencingacute，unexplainedmortalitythatapproached100％amongapproximately30天oldresidentfry.Theinitialdifferentialdiagnosisincludedammonia，亚硝酸盐，orchlorinetoxicosis，aswellasiatrogenicallyinducedtoxicosisassociatedwithimpropersanitationproceduresoflaboratoryequipment.Necropsyofdeadandmoribundfrypriortofixationrevealedswarmsofovoid形，能动，ciliatedprotozoawitha “spiralingfootball” motion.Wetmountpreparationsofvariouswatersamplesalsocontainedhighnumbersofsimilarprotozoa.Histologicexaminationofaffectedfryrevealednumerous，periodicacid-席夫positiveformswithinthebodycoelom，andepithelialandmuscletissues.TheprotozoawereconsistentmorphologicallywithmembersofthegenusTetrahymena，whichisusuallyafree-生活，无病原虫的原生动物淡水环境。与四膜虫相关的病原体与活产鱼相关的疾病已报告同时疾病，免疫抑制，就作者的知识而言，这是关于实验室维护的斑马鱼的任何动物流行性疾病的第一份报告，并采取了诊断措施和治疗措施以减轻四膜虫病相关的clinicaldisease。

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《Comparative Medicine》 |2002年第4期|共页
作者
Astrofsky Keith M.; Schech Joseph M.; Sheppard Barbara J.; Obenschain Christopher A.; Chin Amy M.; Kacergis Michael C.; Laver Elizabeth R.; Bartholomew John L.; Fox James G.;
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中图分类畜牧、动物医学、狩猎、蚕、蜂;
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High Mortality Due to Tetrahymena sp. Infection in Laboratory-Maintained Zebrafish (Brachydanio rerio)

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