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GenWay/Epstein Barr Virus (VCA) IgG/GWB-F14231/1x96 Assays
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4000-520-616
Description:
ProductName | Epstein-BarrVirus(VCA)IgGELISA. |
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#ofSamples | 1x96Assays |
IntendedUse | TheEpstein-BarrVirus(EBV)IgG-ELISAisintendedforthequalitativedeterminationofIgGclassantibodiesagainstEpstein-Barrvirusviralcapsidantigen(VCA)inhumanserumorplasma(citrate). |
Introduction | Epstein-BarrVirus(EBV)isamemberoftheherpesvirusfamily(Gammasubgroup,DNAvirusof120-200nm)andoneofthemostcommonhumanviruses.Thevirusoccursworldwide,andmostpeoplebecomeinfectedwithEBVsometimeduringtheirlives.TransmissionofthevirusisalmostimpossIBLetopreventsincemanyhealthypeoplecancarryandspreadthevirusintermittentlyforlife.InfantsbecomesusceptibletoEBVassoonasmaternalantibodyprotectiondisappears.Infectionofchildrenusuallycausesnosymptoms.Infectionduringadolescenceoryoungadulthoodcausesinfectiousmononucleosis35%to50%ofthetime. Infectiousmononucleosisisalmostneverfatal.TherearenoknownassociationsbetweenactiveEBVinfectionandproblemsduringpregnancy,suchasmiscarriagesorbirthdefects.Althoughthesymptomsofinfectiousmononucleosisusuallyresolvein1or2months,EBVremainsdormantorlatentinafewcellsinthethroatandbloodfortherestoftheperson"slife.Periodically,theviruscanreactivateandiscommonlyfoundinthesalivaofinfectedpersons.Thisreactivationusuallyoccurswithoutsymptomsofillness. EBValsoestablishesalifelongdormantinfectioninsomecellsofthebody"simmunesystem.AlateeventinaveryfewcarriersofthisvirusistheemergenceofBurkitt"slymphomaandnasopharyngealcarcinoma,butEBVisprobablynotthesolecauseofthesemalignancies. Thepresenceofvirusresp.infectionmaybeidentifiedbyPCRSEROlogy:monospottest.DetectionofantibodiesbyELISA TheoptimalcombinationofserologictestingconsistsofthetitrationoffourMarkers:IgMandIgGtotheviralcapsidantigen(VCA),IgMtotheearlyantigen,andantibodytoEBVnuclearantigen(EBNA).IgMtoVCAappearsearlyininfectionanddisappearswithin4to12weeks.IgGtoVCAappearsintheacutephase,peaksat2to4weeksafteronset,declinesslightly,andthenpersistsforlife. Ifantibodiestotheviralcapsidantigenarenotdetected,thepatientissusceptibletoEBVinfection. |
Principlesoftheassay | ThequalitativeimmunoenzymaticdeterminationofIgG-classantibodiesagainstEpstein-BarrVirusisbasedontheELISA(Enzyme-linkedImmunosorbentAssay)technique. MicrotiterstripwellsareprecoatedwithEpstein-BarrVirusantigenstobindcorrespondingantibodiesofthespecimen.AfterwashingthewellstoremoveallunboundsamplematerialhorserADIshperoxidase(HRP)labelledanti-humanIgGconjugateisadded.ThisconjugatebindstothecapturedEpstein-BarrVirus-specificantibodies.TheimmunecomplexformedbytheboundconjugateisvisualizedbyaddingTetramethylbenzidine-(TMB)substratewhichgivesabluereactionproduct.TheintensityofthisproductisproportionaltotheamountofEpstein-BarrVirus-specificIgGantibodiesinthespecimen.Sulphuricacidisaddedtostopthereaction.Thisproducesayellowendpointcolour.Absorbanceat450nmisreadusinganELISAmicrowellplatereader. |
StorageandStABIlity | Thereagentsarestableuptotheexpirydatestatedonthelabelwhenstoredat2-8°C. |
LimitationsoftheTest | Bacterialcontaminationorrepeatedfreeze-thawcyclesofthespecimenmayaffecttheabsorbancevalues.Diagnosisofaninfectiousdiseaseshouldnotbeestablishedonthebasisofasingletestresult.Aprecisediagnosisshouldtakeintoconsiderationclinicalhistory,symptomatologyaswellasserologicaldata. Inimmunocompromisedpatientsandnewbornsserologicaldataonlyhaverestrictedvalue. |
References |
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AdditionalInformation:
Name | EpsteinBarrVirus(VCA)IgG |
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RelatedProductNames | Epstein-BarrVirus(VCA)IgG–ELISA |
MolecularWeight | 0.5 |
Storage | Thereagentsarestableuptotheexpirydatestatedonthelabelwhenstoredat2...8°C. |
IntendedUse | ResearchUseOnly |