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GenWay/Dengue Virus IgG/GWB-F7A6E8/1x96 Assays
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4000-520-616
Description:
ProductName | DengueVirusIgGELISA. |
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#ofSamples | 1x96Assays. |
IntendedUse | TheDenguevirusIgG-ELISAisintendedforthequalitativedeterminationofIgGclassantibodiesagainstDenguevirusinhumanserumorplasma(citrate). |
Introduction | Denguevirusisasingle-strandedRNAvirusofabout50nmindiameterbelongingtothegenusFlavivirus.Dengueanddenguehemorrhagicfeverarecausedbyoneoffourcloselyrelated,butantigenicallydistinct,virusSEROtypes(DEN-1,DEN-2,DEN-3,andDEN-4).Infectionwithoneoftheseserotypesdoesnotprovidecrossprotectiveimmunity,sopersonslivinginadengue-endemic areacanhavefourdengueinfectionsduringtheirlifetimes.ThevirusesaretransmittedbyAedesaegypti,adomestic,day-bitingmosquitothatpreferstofeedonhumans.Infectionwithdenguevirusesproducesaspectrumofclinicalillnessrangingfromanonspecificviralsyndrometosevereandfatalhemorrhagicdisease.Itisprimarilyadiseaseofthetropics;itsglobaldistributioniscomparabletothatofmalaria,andanestimated2.5billionpeopleliveinareasatriskforepidemictransmission.-Globally,thereareanestimated50to100millioncasesofdenguefeverandseveralhundredthousandcasesofdenguehemorrhagicfever. Thecase-fatalityrateofDHFinmostcountriesisabout5%;mostfatalcasesareamongchildrenandyoungadults. ImportantriskfactorsforDHFincludethestrainandserotypeoftheinfectingvirus,aswellastheage,immunestatus,and geneticpredispositionofthepatient. Riskgroups:residentsoforvisitorstotropicalurbanareas. Thepresenceofvirusresp.infectionmaybeidentifiedby Serology:DetectionofantibodiesbyELISA Infectionproduceslifelongimmunity,buttheantigenicallydistinctserotypesdonotprovidecross-protectiveimmunity,soapersoncantheoreticallyexperiencefourdengueinfections;adenguevaccineisnotavailable. |
Principlesoftheassay | ThequalitativeimmunoenzymaticdeterminationofIgG-classantibodiesagainstDengueVirusisbasedontheELISA(Enzyme-linkedImmunosorbentAssay)technique. MicrotiterstripwellsareprecoatedwithDengueVirusantigenstype2tobindcorrespondingantibodiesofthespecimen.AfterwashingthewellstoremoveallunboundsamplematerialhorserADIshperoxidase(HRP)labelledanti-humanIgGconjugateisadded.ThisconjugatebindstothecapturedDengueVirus-specificantibodies.TheimmunecomplexformedbytheboundconjugateisvisualizedbyaddingTetramethylbenzidine(TMB)substratewhichgivesabluereactionproduct.TheintensityofthisproductisproportionaltotheamountofDengueVirus-specificIgGantibodiesinthespecimen.Sulphuricacidisaddedtostopthereaction.Thisproducesayellowendpointcolour.Absorbanceat450nmisreadusinganELISAmicrowellplatereader. |
StorageandStABIlity | Thereagentsarestableuptotheexpirydatestatedonthelabelwhenstoredat2-8°C. |
LimitationsoftheTest | TheFlaviviridaefamilyincludestheserotypesofDenguevirusaswellastheyellowfever,JapaneseencephalitisvirusesandTickborneencephalitis(TBE).Thereisacrossreactivityamongflaviviruses,duetothepresenceofcommonantigendeterminants.DiagnosisofDengueinfectionshouldbemadeinconjunctionwithotherclinicalsignsandsymptomsandlaboratoryfindings.KnowncrossreactionsamongDengueantigensmustbeconsideredduringinterpretationsinceepitopesareknowntoreactwithotherflaviviruses.Itisrecommendedtotestareactivesamplewithasecondserologicalmethod.Bacterialcontaminationorrepeatedfreeze-thawcyclesofthespecimenmayaffecttheabsorbancevalues.Diagnosisofaninfectiousdiseaseshouldnotbeestablishedonthebasisofasingletestresult.Aprecisediagnosisshouldtakeintoconsiderationclinicalhistory,symptomatologyaswellasserologicaldata.Inimmunocompromisedpatientsandnewbornsserologicaldataonlyhaverestrictedvalue. |
References | HayesE.B.,GublerD.J.,Dengueanddenguehemorrhagicfever,PediatricInf.Dis.J.11:311-317,1992CDC:ImportedDengue-UnitedStates1993-1994,J.Am.Med.Assn.274:113,1995Rigau-PerezJ.G.,GublerD.J.,VorndamA.V.etal,DEnguesurveillance-UnitedStates1986-1992,MorbidityandMortalityWeeklyREport43:7-19,1994°CDC:DEnguefeveramongU.S.militarypersonnel-Haiti,September-November,1994,J.Am.Med.Assn.,273:14-15,1994SharpT.W.,WallaceM.R.,HayesC.G.etal,DenguefeverinUStroopsduringOperationRestoreHope,Somalia1992-1993,Am.J.TRop.Med.Hyg.53:89-94,1995 |
AdditionalInformation:
Name | DengueVirusIgG |
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RelatedProductNames | DengueVirusIgG-ELISA |
MolecularWeight | 0.5 |
Storage | Thereagentsarestableuptotheexpirydatestatedonthelabelwhenstoredat2...8°C. |
IntendedUse | ResearchUseOnly |