2015
Dengue Virus Infection of Aedes aegypti Requires a Putative Cysteine Rich Venom Protein
Londono-Renteria B, Troupin A, Conway MJ, Vesely D, Ledizet M, Roundy CM, Cloherty E, Jameson S, Vanlandingham D, Higgs S, Fikrig E, Colpitts TM. Dengue Virus Infection of Aedes aegypti Requires a Putative Cysteine Rich Venom Protein. PLOS Pathogens 2015, 11: e1005202. PMID: 26491875, PMCID: PMC4619585, DOI: 10.1371/journal.ppat.1005202.Peer-Reviewed Original ResearchConceptsDENV infectionVirus infectionDengue virusCysteine-rich venom proteinsSpecific antiviral therapyDengue virus infectionMosquito-borne flavivirusAedes aegypti cellsAntiviral therapyFlavivirus infectionMultiple flavivirusesTherapeutic measuresNew treatmentsAedes aegyptiInfectionGene targetsSerious human diseasesAegypti cellsMosquito vectorsVaccineVenom proteinsFlavivirusesHuman diseasesMosquitoesAntiserum inhibits
2010
Tick Histamine Release Factor Is Critical for Ixodes scapularis Engorgement and Transmission of the Lyme Disease Agent
Dai J, Narasimhan S, Zhang L, Liu L, Wang P, Fikrig E. Tick Histamine Release Factor Is Critical for Ixodes scapularis Engorgement and Transmission of the Lyme Disease Agent. PLOS Pathogens 2010, 6: e1001205. PMID: 21124826, PMCID: PMC2991271, DOI: 10.1371/journal.ppat.1001205.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBiomarkers, TumorBlotting, WesternBorrelia burgdorferiFeeding BehaviorFemaleHistamineHumansImmunizationIxodesLyme DiseaseMiceMice, Inbred C3HReverse Transcriptase Polymerase Chain ReactionRNA, MessengerRNA, Small InterferingSalivaTick InfestationsTumor Protein, Translationally-Controlled 1ConceptsTick-borne pathogensB. burgdorferi transmissionTick engorgementB. burgdorferi burdenHistamine-releasing factorRapid feeding phaseBurgdorferi-infected ticksAnimal healthTick feedingTick salivaDiverse infectious agentsDisease agentsTicksIxodes scapularisLyme disease agentRNA interferenceFeeding phaseVaccine potentialQuantitative reverse transcription PCRReverse transcription-PCRHistamine releaseEffective vaccineVascular permeabilityBlood flowInfectious agents
2006
Disruption of the salivary protein 14 in Ixodes scapularis nymphs and impact on pathogen acquisition.
Pedra JH, Narasimhan S, Deponte K, Marcantonio N, Kantor FS, Fikrig E. Disruption of the salivary protein 14 in Ixodes scapularis nymphs and impact on pathogen acquisition. American Journal Of Tropical Medicine And Hygiene 2006, 75: 677-82. PMID: 17038693, DOI: 10.4269/ajtmh.2006.75.677.Peer-Reviewed Original ResearchConceptsScapularis nymphsProtein 14Adult Ixodes scapularisIxodes scapularis nymphsI. scapularisBorrelia burgdorferiTick feedingI. scapularis nymphsB. burgdorferiFamily expressionEngorgement weightTick weightPhysiological rolePathogen acquisitionBurgdorferiIxodes scapularisRNA interferenceExpressionDifferent mechanismsFeedingScapularis
2005
Seroprevalence of antibodies against Borrelia burgdorferi and Anaplasma phagocytophilum in cats.
Magnarelli LA, Bushmich SL, IJdo JW, Fikrig E. Seroprevalence of antibodies against Borrelia burgdorferi and Anaplasma phagocytophilum in cats. American Journal Of Veterinary Research 2005, 66: 1895-9. PMID: 16334946, DOI: 10.2460/ajvr.2005.66.1895.Peer-Reviewed Original ResearchConceptsRecombinant antigensSerum antibodiesB. burgdorferiHealthy catsBorrelia burgdorferiSeroprevalence of antibodiesWestern blot testingAnaplasma phagocytophilumA. phagocytophilumB. burgdorferi antigensWhole cell antigenA. phagocytophilum infectionIndirect fluorescent antibody stainingWestern blot analysisIxodes scapularis ticksSeropositivity rateWhole-cell B. burgdorferiSerum reactivityIll catsFluorescent antibody stainingClinical relevanceSera reactiveSpecific recombinant antigensMost catsOuter surface proteins
2004
A comparison of serologic tests for the detection of serum antibodies to whole-cell and recombinant Borrelia burgdorferi antigens in cattle.
Magnarelli LA, Bushmich SL, Sherman BA, Fikrig E. A comparison of serologic tests for the detection of serum antibodies to whole-cell and recombinant Borrelia burgdorferi antigens in cattle. Canadian Veterinary Journal 2004, 45: 667-73. PMID: 15368740, PMCID: PMC546445.Peer-Reviewed Original ResearchMeSH KeywordsAnaplasma phagocytophilumAnimalsAntibodies, BacterialAntigens, BacterialBlotting, WesternBorrelia burgdorferiCattleCattle DiseasesConnecticutEnzyme-Linked Immunosorbent AssayFemaleFluorescent Antibody Technique, IndirectLyme DiseaseMaleMolecular WeightRecombinant ProteinsReproducibility of ResultsSensitivity and SpecificityTick InfestationsConceptsPolyvalent enzyme-linked immunosorbentVlsE antigenBorrelia burgdorferi antigensRecombinant antigensAntibody staining methodsHealthy dairyB. burgdorferi antigensIndirect fluorescent-antibody staining methodsCattle seraHigh specificityLeptospira interrogans serovarsBrucella spWhole cell antigenSerum samplesWestern blot procedureP39 antigenDisruption of Ixodes scapularis anticoagulation by using RNA interference
Narasimhan S, Montgomery RR, DePonte K, Tschudi C, Marcantonio N, Anderson JF, Sauer JR, Cappello M, Kantor FS, Fikrig E. Disruption of Ixodes scapularis anticoagulation by using RNA interference. Proceedings Of The National Academy Of Sciences Of The United States Of America 2004, 101: 1141-1146. PMID: 14745044, PMCID: PMC337020, DOI: 10.1073/pnas.0307669100.Peer-Reviewed Original ResearchConceptsAnti-factor Xa activityNumerous infectious diseasesIxodes scapularis ticksRNA interferenceMultiple anticoagulantsReduction of mRNAXa activityVaccine candidatesInfectious diseasesTick salivaAnticoagulantsBabesia microtiPhysiologic functionI. scapularis salivaSalivary glandsBorrelia burgdorferiTick feedingScapularis ticksAnticoagulant activityAnaplasma phagocytophilumTick engorgementSuch interventionsEngorgement weightEngorgementKey target
2002
Antibodies to granulocytic ehrlichiae in cattle from Connecticut
Magnarelli LA, Ijdo JW, Sherman B, Bushmich SL, Levy SA, Fikrig E. Antibodies to granulocytic ehrlichiae in cattle from Connecticut. Journal Of Medical Microbiology 2002, 51: 326-331. PMID: 11926738, DOI: 10.1099/0022-1317-51-4-326.Peer-Reviewed Original ResearchConceptsIndirect fluorescent antibody
2001
Reactivity of dog sera to whole-cell or recombinant antigens of Borrelia burgdorferi by ELISA and immunoblot analysis
Magnarelli LA, Levy SA, Ijdo JW, Wu C, Padula SJ, Fikrig E. Reactivity of dog sera to whole-cell or recombinant antigens of Borrelia burgdorferi by ELISA and immunoblot analysis. Journal Of Medical Microbiology 2001, 50: 889-895. PMID: 11599738, DOI: 10.1099/0022-1317-50-10-889.Peer-Reviewed Original ResearchConceptsEnzyme-linked immunosorbent assayWhole cell antigenRecombinant antigensB. burgdorferiNon-vaccinated dogsPolyvalent enzyme-linked immunosorbent assaysCanine borreliosisTick-infested areasTotal immunoglobulinWhole-cell B. burgdorferiAntibody titresBorrelia burgdorferi sensu strictoVaccinated dogsJoint disordersImmune responseBurgdorferi sensu strictoAntigenImmunosorbent assaySerumDogsNatural infectionReactivity of serum samples of dogs and horses tested by use of class-specific recombinant-based enzyme-linked immunosorbent assays for detection of granulocytic ehrlichiosis.
Magnarelli LA, Ijdo JW, Van Andel AE, Wu C, Oliver JH, Fikrig E. Reactivity of serum samples of dogs and horses tested by use of class-specific recombinant-based enzyme-linked immunosorbent assays for detection of granulocytic ehrlichiosis. American Journal Of Veterinary Research 2001, 62: 1365-9. PMID: 11560261, DOI: 10.2460/ajvr.2001.62.1365.Peer-Reviewed Original ResearchConceptsIgG antibodiesSerum samplesHGE agentGranulocytic ehrlichiosisClient-owned dogsDog serum samplesHuman granulocytic ehrlichiosis (HGE) agentEnzyme-linked immunosorbentPositive resultsWestern blot analysisTick-infested areasEhrlichia phagocytophila genogroupTotal immunoglobulinHorse serum samplesPromyelocytic leukemia cellsClinical relevanceHuman promyelocytic leukemia cellsProtein antigensIgMELISADogsLeukemia cellsAntibodiesBlot analysisAntigenRecombinant Protein-44-Based Class-Specific Enzyme-Linked Immunosorbent Assays for Serologic Diagnosis of Human Granulocytic Ehrlichiosis
Magnarelli L, IJdo J, Wu C, Fikrig E. Recombinant Protein-44-Based Class-Specific Enzyme-Linked Immunosorbent Assays for Serologic Diagnosis of Human Granulocytic Ehrlichiosis. European Journal Of Clinical Microbiology & Infectious Diseases 2001, 20: 482-485. PMID: 11561804, DOI: 10.1007/s100960100542.Peer-Reviewed Original ResearchConceptsPolyvalent enzyme-linked immunosorbent assaysClass-specific enzyme-linked immunosorbent assaysEnzyme-linked immunosorbent assayIndirect fluorescent-antibody analysisFluorescent antibody analysisImmunosorbent assaySpecificity testsIgG antibodiesHigh sensitivityHuman granulocytic ehrlichiosisHuman serumGranulocytic ehrlichiosisWhole cell antigenAntibody analysisImmunoglobulin M antibodiesOnset of illnessSerologic diagnosisSerum samplesHuman granulocytic ehrlichiosis (HGE) agentPatient 3False-positive resultsIgM antibodiesM antibodiesTotal immunoglobulinTotal antibodyEvaluation of a polyvalent enzyme-linked immunosorbent assay incorporating a recombinant p44 antigen for diagnosis of granulocytic ehrlichiosis in dogs and horses.
Magnarelli LA, Ijdo JW, Van Andel AE, Wu C, Fikrig E. Evaluation of a polyvalent enzyme-linked immunosorbent assay incorporating a recombinant p44 antigen for diagnosis of granulocytic ehrlichiosis in dogs and horses. American Journal Of Veterinary Research 2001, 62: 29-32. PMID: 11197555, DOI: 10.2460/ajvr.2001.62.29.Peer-Reviewed Original ResearchConceptsEquine samplesPolyvalent ELISAPolyvalent enzyme-linked immunosorbentGranulocytic ehrlichiosisIFA stainingEquine serum samplesE risticiiEhrlichia canisCanine serum samplesCanine samplesSpecific recombinant antigensE equiHorsesEhrlichiosisPercentage of samplesIndirect fluorescent antibody stainingRecombinant antigensDogsWhole cell antigenCanisEquiELISA resultsSerum samplesPresent studyFluorescent antibody staining
2000
SALP16, a gene induced in Ixodes scapularis salivary glands during tick feeding.
Das S, Marcantonio N, Deponte K, Telford SR, Anderson JF, Kantor FS, Fikrig E. SALP16, a gene induced in Ixodes scapularis salivary glands during tick feeding. American Journal Of Tropical Medicine And Hygiene 2000, 62: 99-105. PMID: 10761732, DOI: 10.4269/ajtmh.2000.62.99.Peer-Reviewed Original ResearchAmino Acid SequenceAnimalsBase SequenceBlotting, WesternEnzyme-Linked Immunosorbent AssayFeeding BehaviorFemaleGene Expression RegulationGene LibraryGuinea PigsIxodesMiceMice, Inbred C3HMolecular Sequence DataPolymerase Chain ReactionRandom Amplified Polymorphic DNA TechniqueRecombinant ProteinsRNASalivary GlandsSalivary Proteins and PeptidesSequence Analysis, DNATick Infestations
1999
ANTIBODIES TO GRANULOCYTIC EHRLICHIAE IN WHITE-FOOTED AND COTTON MICE IN EASTERN UNITED STATES
Magnarelli L, Stafford K, IJdo J, Fikrig E, Oliver J, Hutcheson H, Boone J. ANTIBODIES TO GRANULOCYTIC EHRLICHIAE IN WHITE-FOOTED AND COTTON MICE IN EASTERN UNITED STATES. Journal Of Wildlife Diseases 1999, 35: 259-265. PMID: 10231752, DOI: 10.7589/0090-3558-35.2.259.Peer-Reviewed Original ResearchConceptsIndirect fluorescent antibodyNCH-1 strainHuman granulocytic ehrlichiosis (HGE) agentGranulocytic ehrlichiaeWestern blot analysisP. gossypinusSerologic assaysImmune responseWestern blot procedureEtiologic agentMouse serumSurveillance programSerum samplesMiceSerumAntibodiesEndemic sitesFluorescent antibodyBlot analysisWhite-footed miceIFA methodTitersEhrlichiaeP. leucopusAmelia IslandINFECTIONS OF GRANULOCYTIC EHRLICHIAE AND BORRELIA BURGDORFERI IN WHITE-TAILED DEER IN CONNECTICUT
Magnarelli L, IJdo J, Stafford K, Fikrig E. INFECTIONS OF GRANULOCYTIC EHRLICHIAE AND BORRELIA BURGDORFERI IN WHITE-TAILED DEER IN CONNECTICUT. Journal Of Wildlife Diseases 1999, 35: 266-274. PMID: 10231753, DOI: 10.7589/0090-3558-35.2.266.Peer-Reviewed Original Research
1997
Antibodies to Ehrlichia equi in dogs from the northeastern United States.
Magnarelli L, IJdo J, Anderson J, Madigan J, Dumler J, Fikrig E. Antibodies to Ehrlichia equi in dogs from the northeastern United States. Journal Of The American Veterinary Medical Association 1997, 211: 1134-7. PMID: 9364226, DOI: 10.2460/javma.1997.211.09.1134.Peer-Reviewed Original ResearchConceptsE equiIndirect fluorescent antibodyWestern blot analysisSerologic testing methodsFluorescent antibodyBlot analysisTick-infested areasSeropositive dogsIll dogsMarked leukopeniaNormal dogsSubclinical infectionSerologic analysisEtiologic agentLaboratory diagnosisEnd pointGranulocytic ehrlichiosisEhrlichia equiDogsAntibodiesHuman isolatesBorrelia burgdorferiDog serumMultiple pathogensEhrlichiosis
1995
Serologic responses of dogs naturally exposed to or vaccinated against Borrelia burgdorferi infection.
Barthold S, Levy S, Fikrig E, Bockenstedt L, Smith A. Serologic responses of dogs naturally exposed to or vaccinated against Borrelia burgdorferi infection. Journal Of The American Veterinary Medical Association 1995, 207: 1435-40. PMID: 7493871, DOI: 10.2460/javma.1995.207.11.1435.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAntibodies, BacterialBacterial Outer Membrane ProteinsBacterial ProteinsBacterial VaccinesBiological AssayBlotting, WesternBorrelia burgdorferi GroupDog DiseasesDogsEnzyme-Linked Immunosorbent AssayFemaleImmune SeraImmunoglobulin GImmunoglobulin MLyme DiseaseMaleMiceMice, Inbred C3HVaccinationConceptsSerologic responseAntibiotic treatmentVaccinated dogsRecombinant outer surface proteinPassive protective activityBorrelia burgdorferi infectionMeans of ELISAImmunoblot analysisSeronegative dogsClinical responseSerologic testingClinical criteriaControl dogsAntibody responseMouse protectionB burgdorferiClinical trialsBurgdorferi infectionInfected dogsELISA titersProtective activityOuter surface proteinsUseful antigenDogsBorrelia burgdorferi
1994
Outer surface proteins E and F of Borrelia burgdorferi, the agent of Lyme disease
Lam TT, Nguyen TP, Montgomery RR, Kantor FS, Fikrig E, Flavell RA. Outer surface proteins E and F of Borrelia burgdorferi, the agent of Lyme disease. Infection And Immunity 1994, 62: 290-298. PMID: 8262642, PMCID: PMC186099, DOI: 10.1128/iai.62.1.290-298.1994.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAntigens, BacterialBacterial Outer Membrane ProteinsBacterial ProteinsBase SequenceBlotting, WesternBorrelia burgdorferi GroupCloning, MolecularCodonFluorescent Antibody TechniqueGenes, BacterialHumansLipoproteinsLyme DiseaseMolecular Sequence DataMolecular WeightOperonRegulatory Sequences, Nucleic AcidRestriction MappingSequence AlignmentSequence Homology, Nucleic AcidSolubilityConceptsOspE genesMolecular massSignal peptidase IIConsensus cleavage sequenceTranscriptional unitsLeader sequenceCommon promoterBp downstreamOuter surface proteinsProtein EStop codonSurface lipoproteinsLabeling showBorrelia burgdorferiGenesHydrophobic domainCleavage sequenceSurface proteinsAmino acidsPeptidase IIProteinOuter surface protein EGel electrophoresisNucleotidesImmunofluorescence studies
1991
Molecular mapping of Osp-A mediated immunity against Borrelia burgdorferi, the agent of Lyme disease.
Sears JE, Fikrig E, Nakagawa TY, Deponte K, Marcantonio N, Kantor FS, Flavell RA. Molecular mapping of Osp-A mediated immunity against Borrelia burgdorferi, the agent of Lyme disease. The Journal Of Immunology 1991, 147: 1995-2000. PMID: 1716290, DOI: 10.4049/jimmunol.147.6.1995.Peer-Reviewed Original ResearchConceptsLack of responseSurface protein AOuter surface protein AUninfected miceProtect miceProtective immunityImmunized miceImmune responseProtective epitopesLyme diseaseMiceInfected humansInfectionSerumNatural infectionBorrelia burgdorferiDependent epitopesAntibodiesEpitopesImmunityHuman serumHumansProtein AImmunizationVaccine