2023
Dynamics of chikungunya virus transmission in the first year after its introduction in Brazil: A cohort study in an urban community
Anjos R, Portilho M, Jacob-Nascimento L, Carvalho C, Moreira P, Sacramento G, Nery N, de Oliveira D, Cruz J, Cardoso C, Argibay H, Plante K, Plante J, Weaver S, Kitron U, Reis M, Ko A, Costa F, Ribeiro G. Dynamics of chikungunya virus transmission in the first year after its introduction in Brazil: A cohort study in an urban community. PLOS Neglected Tropical Diseases 2023, 17: e0011863. PMID: 38150470, PMCID: PMC10775974, DOI: 10.1371/journal.pntd.0011863.Peer-Reviewed Original Research
2022
Leptospira Infection in Rural Areas of Urabá Region, Colombia: A Prospective Study.
Quintero-Vélez J, Rodas J, Rojas C, Ko A, Wunder E. Leptospira Infection in Rural Areas of Urabá Region, Colombia: A Prospective Study. American Journal Of Tropical Medicine And Hygiene 2022, 107: 1267-1277. PMID: 36375452, PMCID: PMC9768283, DOI: 10.4269/ajtmh.21-1103.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAntibodies, BacterialColombiaDogsLeptospiraLeptospirosisMaleProspective StudiesRatsSeroepidemiologic StudiesSwineConceptsOutdoor occupationsLeptospira infectionProspective studyRisk factorsMultivariable modelLeptospira seroprevalenceLogistic regression modelsEco-epidemiological aspectsMultinomial logistic regression modelsMultivariable analysisSerologic testingPrimary exposureMale genderMicroscopic agglutinationPresence of ratsOlder ageRural areasLeptospira serogroupsInfectionSeroincidenceLeptospira speciesSeroprevalenceSerogroupsRegression modelsDirt floorsStructural factors associated with SARS-CoV-2 infection risk in an urban slum setting in Salvador, Brazil: A cross-sectional survey
Fofana MO, Nery N, Ticona J, de Andrade Belitardo EMM, Victoriano R, Anjos RO, Portilho MM, de Santana MC, dos Santos LL, de Oliveira D, Cruz JS, Muenker MC, Khouri R, Wunder EA, Hitchings MDT, Johnson O, Reis MG, Ribeiro GS, Cummings DAT, Costa F, Ko AI. Structural factors associated with SARS-CoV-2 infection risk in an urban slum setting in Salvador, Brazil: A cross-sectional survey. PLOS Medicine 2022, 19: e1004093. PMID: 36074784, PMCID: PMC9499230, DOI: 10.1371/journal.pmed.1004093.Peer-Reviewed Original ResearchMeSH KeywordsAdultBrazilChildCOVID-19Cross-Sectional StudiesFemaleHumansImmunoglobulin GMalePandemicsPoverty AreasSARS-CoV-2Seroepidemiologic StudiesSpike Glycoprotein, CoronavirusConceptsSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infectionAcute respiratory syndrome coronavirus 2 infectionSARS-CoV-2 infection riskUrban slumsSyndrome coronavirus 2 infectionSARS-CoV-2 seroprevalenceSARS-CoV-2 incidenceCoronavirus 2 infectionCross-sectional serosurveyMain outcome measuresUrban slum populationPresence of IgGSARS-CoV-2 spike proteinUrban slum communityCross-sectional surveyUrban slum residentsCumulative incidenceMedian ageRisk factorsOutcome measuresStudy populationHigh seroprevalenceMedian dailyPandemic waveGender distributionReliable estimation of SARS-CoV-2 anti-spike protein IgG titers from single dilution optical density values in serologic surveys
Belitardo E, Nery N, Ticona J, Portilho MM, Mello IO, Ribeiro GS, Reis MG, Costa F, Cummings DAT, Ko AI, Fofana MO. Reliable estimation of SARS-CoV-2 anti-spike protein IgG titers from single dilution optical density values in serologic surveys. Diagnostic Microbiology And Infectious Disease 2022, 104: 115807. PMID: 36162285, PMCID: PMC9428330, DOI: 10.1016/j.diagmicrobio.2022.115807.Peer-Reviewed Original ResearchMeSH KeywordsAntibodies, ViralCOVID-19HumansImmunoglobulin GReproducibility of ResultsSARS-CoV-2Seroepidemiologic StudiesConceptsSARS-CoV-2 incidenceCommunity-based cohortPopulation-level immunitySARS-CoV-2Large-scale serosurveysELISA optical densityIgG titersIgG ELISAPandemic evolvesSerologic surveyTitersOptical density valuesPopulation-level changesSerosurveyImmunitySingle dilutionSerial dilutionsNODCohortIncidenceELISASerum
2021
SARS-CoV-2 Infection Hospitalization Rate and Infection Fatality Rate Among the Non-Congregate Population in Connecticut
Mahajan S, Caraballo C, Li SX, Dong Y, Chen L, Huston SK, Srinivasan R, Redlich CA, Ko AI, Faust JS, Forman HP, Krumholz HM. SARS-CoV-2 Infection Hospitalization Rate and Infection Fatality Rate Among the Non-Congregate Population in Connecticut. The American Journal Of Medicine 2021, 134: 812-816.e2. PMID: 33617808, PMCID: PMC7895685, DOI: 10.1016/j.amjmed.2021.01.020.Peer-Reviewed Original ResearchConceptsInfection hospitalization rateInfection fatality rateHospitalization ratesFatality rateSeroprevalence estimatesSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antibodiesSARS-CoV-2 antibodiesConnecticut Hospital AssociationNon-Hispanic black peopleProportion of deathsCoronavirus disease 2019Total infected individualsTotal hospitalizationsAdverse outcomesNon-congregate settingsHigh burdenDisease 2019Prevalence studyMost subgroupsInfected individualsHospitalizationOlder peopleHospital AssociationConnecticut DepartmentDeath
2020
Effects of Accounting for Interval-Censored Antibody Titer Decay on Seroincidence in a Longitudinal Cohort Study of Leptospirosis
Bonner K, Cruz JS, Sacramento GA, de Oliveira D, Nery N, Carvalho M, Costa F, Childs JE, Ko AI, Diggle PJ. Effects of Accounting for Interval-Censored Antibody Titer Decay on Seroincidence in a Longitudinal Cohort Study of Leptospirosis. American Journal Of Epidemiology 2020, 190: 893-899. PMID: 33274738, PMCID: PMC8096484, DOI: 10.1093/aje/kwaa253.Peer-Reviewed Original ResearchMeSH KeywordsBrazilHumansIncidenceItalyLeptospirosisLongitudinal StudiesRisk FactorsSeroepidemiologic StudiesConceptsLongitudinal cohort studyCohort studyMicroscopic agglutination test titersAgglutination test titersHigh transmission settingsPoint-source exposureSeroincidence ratesEstimates of infectionRisk factorsTest titersReported casesEpidemiologic implicationsInfection rateMean infection rateSerological samplesSerological assaysLeptospirosis casesInfectionArboviral diseasesTiter dilutionsSeroincidenceSource exposureLeptospirosisSample size estimationIntervalSeroprevalence of SARS-CoV-2-Specific IgG Antibodies Among Adults Living in Connecticut: Post-Infection Prevalence (PIP) Study
Mahajan S, Srinivasan R, Redlich CA, Huston SK, Anastasio KM, Cashman L, Massey DS, Dugan A, Witters D, Marlar J, Li SX, Lin Z, Hodge D, Chattopadhyay M, Adams MD, Lee C, Rao LV, Stewart C, Kuppusamy K, Ko AI, Krumholz HM. Seroprevalence of SARS-CoV-2-Specific IgG Antibodies Among Adults Living in Connecticut: Post-Infection Prevalence (PIP) Study. The American Journal Of Medicine 2020, 134: 526-534.e11. PMID: 33130124, PMCID: PMC7598362, DOI: 10.1016/j.amjmed.2020.09.024.Peer-Reviewed Original ResearchConceptsSARS-CoV-2-specific IgG antibodiesWeighted seroprevalenceIgG antibodiesSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antibodiesSARS-CoV-2-specific antibodiesConnecticut residentsSelf-reported adherenceImmunoglobulin G antibodiesSARS-CoV-2Symptomatic illnessSerology testingSeroprevalence studyG antibodiesPrevalence studyGeneral populationPercentage of peopleSeroprevalenceLack antibodiesMajority of respondentsAntibodiesHispanic subpopulationsConvenience sampleHispanic populationCOVID-19Risk mitigation behaviorsSeroepidemiology of Leptospira infection in slaughtered cattle in Gauteng province, South Africa
Dogonyaro BB, van Heerden H, Potts AD, Kolo BF, Lotter C, Katsande C, Fasina FO, Ko AI, Wunder EA, Adesiyun AA. Seroepidemiology of Leptospira infection in slaughtered cattle in Gauteng province, South Africa. Tropical Animal Health And Production 2020, 52: 3789-3798. PMID: 33009586, PMCID: PMC10407966, DOI: 10.1007/s11250-020-02417-0.Peer-Reviewed Original ResearchMeSH KeywordsAbattoirsAgglutination TestsAnimalsCattleCattle DiseasesCross-Sectional StudiesLeptospiraLeptospirosisRisk FactorsSeroepidemiologic StudiesSerogroupSouth AfricaConceptsSeroprevalence of leptospirosisMicroscopic agglutination testRisk factorsCattle populationSeropositive cattleSerogroup SejroeSouth AfricaCattleCross-sectional studyLeptospira sppPublic health importancePredominant serogroupVaccine serogroupsAbattoirLivestockLeptospira infectionGauteng ProvinceCutoff titerBlood samplesLeptospirosisSejroeDemographic dataHealth importanceAgglutination testSeroprevalenceTransmission of Chikungunya Virus in a Brazilian Urban Slum - Volume 26, Number 7—July 2020 - Emerging Infectious Diseases journal - CDC
Anjos RO, Mugabe VA, Moreira PSS, Carvalho CX, Portilho MM, Khouri R, Sacramento GA, Nery NRR, Reis MG, Kitron UD, Ko AI, Costa F, Ribeiro GS. Transmission of Chikungunya Virus in a Brazilian Urban Slum - Volume 26, Number 7—July 2020 - Emerging Infectious Diseases journal - CDC. Emerging Infectious Diseases 2020, 26: 1364-1373. PMID: 32568045, PMCID: PMC7323528, DOI: 10.3201/eid2607.190846.Peer-Reviewed Original ResearchMeSH KeywordsAntibodies, ViralBrazilChikungunya FeverChikungunya virusCross-Sectional StudiesDisease OutbreaksHumansPoverty AreasSeroepidemiologic StudiesConceptsEpisodes of feverChikungunya outbreakInfectious Diseases journal - CDCSymptomatic infection ratePresumptive clinical diagnosisSufficient herd immunityCommunity-based studyFurther longitudinal studiesCHIKV seroprevalenceSeropositive personsVirus seroprevalenceClinical dataHerd immunityChikungunya virusInfection rateClinical diagnosisSerum samplesDisease pointUnpaved streetsArthralgiaLongitudinal studyFeverSeroprevalenceEpisodesOutbreak
2019
Seroprevalence, Risk Factors, and Rodent Reservoirs of Leptospirosis in an Urban Community of Puerto Rico, 2015
Briskin EA, Casanovas-Massana A, Ryff KR, Morales-Estrada S, Hamond C, Perez-Rodriguez NM, Benavidez KM, Weinberger DM, Castro-Arellano I, Wunder EA, Sharp TM, Rivera-Garcia B, Ko AI. Seroprevalence, Risk Factors, and Rodent Reservoirs of Leptospirosis in an Urban Community of Puerto Rico, 2015. The Journal Of Infectious Diseases 2019, 220: 1489-1497. PMID: 31342075, PMCID: PMC6761939, DOI: 10.1093/infdis/jiz339.Peer-Reviewed Original ResearchConceptsRisk factorsAnti-Leptospira antibodiesBurden of leptospirosisRisk of infectionMicroscopic agglutination testCross-sectional surveyQuantitative polymerase chain reactionSeropositive individualsPrevious infectionPolymerase chain reactionLeptospira infectionLeptospira carriageSerogroup IcterohaemorrhagiaeHigh titersStudy participantsAgglutination testLeptospira exposurePathogenic LeptospiraInfectionRodent reservoirsChain reactionAntibodiesRodent trappingSeroprevalenceCommunity sitesImpact of preexisting dengue immunity on Zika virus emergence in a dengue endemic region
Rodriguez-Barraquer I, Costa F, Nascimento EJM, Nery N, Castanha PMS, Sacramento GA, Cruz J, Carvalho M, De Olivera D, Hagan JE, Adhikarla H, Wunder EA, Coêlho DF, Azar SR, Rossi SL, Vasilakis N, Weaver SC, Ribeiro GS, Balmaseda A, Harris E, Nogueira ML, Reis MG, Marques ETA, Cummings DAT, Ko AI. Impact of preexisting dengue immunity on Zika virus emergence in a dengue endemic region. Science 2019, 363: 607-610. PMID: 30733412, PMCID: PMC8221194, DOI: 10.1126/science.aav6618.Peer-Reviewed Original ResearchConceptsZika virusZIKV NS1 antigenAttack rateZika virus emergenceHigh antibody titersDengue-endemic regionsZIKV immunityClinical outcomesDengue immunityZIKV infectionAntibody titersNS1 antigenRisk factorsEndemic regionsDengue virusImmunityVirusRiskVirus emergenceFuture transmissionCohortSymptomsInfectionAntigenTiters