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GenWay/Coxiella Burnetii (Q-Fever) Phase 2 IgG/GWB-2EB8D1/1x96 Assays
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4000-520-616
Description:
ProductName | Coxiellaburnetii(Q-Fever)Phase2IgG-ELISA. |
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#ofSamples | 1x96Assays. |
IntendedUse | TheELISAisintendedforthequalitativedeterminationofIgGclassantibodiesagainstCoxiellaburnetiiphase2intheearlystagesofinfectioninhumanserum. |
Introduction | Q-Feverisadiseasethatresultsfrominfectionwithsmall,polymorphandgram-negativebacteriacalledCoxiellaburnetii.AfteranoutbreakinBrisbane,Australia,theresponsIBLeorganismwasisolatedandnamedCoxiellaburnetiiinhonourofDr.HeraldRaeCoxandSirFrankBurnet.NewmolecularresearchdemonstratedacloserelationshiptoLegionella.ThezoonosisQ-FeverisfoundeverywhereexceptNewZealand(nodataavailable).Thereisanextensivereservoir(mainlyticks)ofC.burnetii.Ticksareanimportantvectorofthepathogeninthetransmissionbetweendomesticandwildlifeanimals.Buttheticksareunimportantinthedirectinfectionofhumans.Cattles,sheepandgoatsareusuallythesourceoftransmissionofthismicroorganismtohumans.Howevercats,dogsandrabbitsarealsoimportantinthisregard.InmostinstanceshumansbecomeinfectedwithCoxiellaburnetiifollowinginhalationofcontaminatedaerosols(respiratorytract).TheincubationperiodforQ-Feverinhumansisabout2weeks.Theresultingillnesscanbedividedintoacuteandchronicvarieties.Duringtheacutephaseofillnessantibodiestothephase2-antigenareformed.Antiphase-1antibodiesinhightitersaretypicalforachronicdisease. InareaswhereQ-Feverisendemic,12%ormoreofthepopulationhaveantibodiestoC.burnetii.Mostoftheinfectionsaresubclinicalorundiagnosed. Theacuteinfectionshowssymptomsofhighfever,shivers,musclepainandheadache.Lateronmoreseverediseasessuchaspneumoniaorhepatitiscanoccur.Infectionsduringpregnancycanleadtoanabortorprematurebirth.Approximately1%ofallinfectionsbecomechronic.ThemostfrequentorganmanifestationinQ-Feverisendocarditis.Diagnosticmethods Complementbindingreactionisstillused IFT(immunofixationtest) ELISA Cellculture PCR IFTaswellasELISAdifferentiatebetweendifferentantibodyclasses(IgG/IgM/IgA).AcutephaseofQ-Fever IgMspecifictophase2after2-3weeks IgGapproximately2monthsafterinfection.ChronicphaseofQ-Fever From6weeksupto4monthsafterinfectionphase1IgGandIgAantibodiescanbedetected. |
Principlesoftheassay | ThequalitativeimmunoenzymaticdeterminationofIgG-classantibodiestoCoxiellaburnetiiisbasedontheELISA(Enzyme-linkedImmunosorbentAssay)technique. Microtiterstripwellsareprecoatedwithphase2antigenstobindcorrespondingantibodiesofthespecimen.AfterwashingthewellstoremoveallunboundsamplematerialhorserADIshperoxidase(HRP)labelledanti-humanIgGconjugateisadded.ThisconjugatebindstothecapturedCoxiellaburnetii-specificantibodies.TheimmunecomplexformedbytheboundconjugateisvisualizedbyaddingTetramethylbenzidine(TMB)substratewhichgivesabluereactionproduct.Theintensityofthisproductisproportionaltotheamountofphase2-specificIgGantibodiesinthespecimen.Sulphuricacidisaddedtostopthereaction.Thisproducesayellowendpointcolour.Absorbanceat450nmisreadusinganELISAmicrowellplatereader. |
StorageandStABIlity | Thereagentsarestableuptotheexpirydatestatedonthelabelwhenstoredat2-8°C. |
LimitationsoftheTest | Bacterialcontaminationorrepeatedfreeze-thawcyclesofthespecimenmayaffecttheabsorbancevalues.Diagnosisofaninfectiousdiseaseshouldnotbeestablishedonthebasisofasingletestresult.Aprecisediagnosisshouldtakeintoconsiderationclinicalhistory,symptomatologyaswellasSEROlogicaldata. Inimmunocompromisedpatientsandnewbornsserologicaldataonlyhaverestrictedvalue. |
References | McDadeJE:HistoricalaspectsofQ-Fever:Thedisease.CRCPress,1990,5MarrieTS:Coxiellaburnetiipneumonia.ClinInfectDisease21(Suppl.3),1995,253RaoultDandMarrieT:Q-Fever.ClinInfectDisease20,1995,489KaplanMMandBertagna,P:ThegeographicaldistributionofQ-Fever.BullWorldHealthOrgan13,1995,829DellacasagrandeJ,etal.:C.burnetiisurvivesinmonocytesfrompatientswithQ-Feverendocarditis.InfectImmun68,2000,160. |
AdditionalInformation:
Name | CoxiellaBurnetii(Q-Fever)Phase2IgG |
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RelatedProductNames | Coxiellaburnetii(Q-Fever)Phase2IgG-ELISA |
MolecularWeight | 0.5 |
Storage | Thereagentsarestableuptotheexpirydatestatedonthelabelwhenstoredat2...8°C. |
IntendedUse | ResearchUseOnly |