2024
Overestimation of Severe Acute Respiratory Syndrome Coronavirus 2 Household Transmission in Settings of High Community Transmission: Insights From an Informal Settlement Community in Salvador, Brazil
Ticona J, Nery N, Hitchings M, Belitardo E, Fofana M, Dorión M, Victoriano R, Cruz J, Santana J, de Moraes L, Cardoso C, Ribeiro G, Reis M, Khouri R, Costa F, Ko A, Cummings D. Overestimation of Severe Acute Respiratory Syndrome Coronavirus 2 Household Transmission in Settings of High Community Transmission: Insights From an Informal Settlement Community in Salvador, Brazil. Open Forum Infectious Diseases 2024, 11: ofae065. PMID: 38516384, PMCID: PMC10957159, DOI: 10.1093/ofid/ofae065.Peer-Reviewed Original ResearchSARS-CoV-2Household transmissionRT-PCR positive casesSecondary attack rateAttack rateSARS-CoV-2 infectionSARS-CoV-2 Omicron variantRisk of infectionCommunity acquisitionTherapeutic optionsCOVID-19-related symptomsCase-finding studyHousehold contactsAcquisition of SARS-CoV-2Increased riskSymptom onsetSecondary infectionBooster vaccinationSevere outcomesBiweekly visitsHighest attack rateRT-PCRInfectionCOVID-19 severe outcomesOmicron BA
2015
Patterns in Leptospira Shedding in Norway Rats (Rattus norvegicus) from Brazilian Slum Communities at High Risk of Disease Transmission
Costa F, Wunder EA, De Oliveira D, Bisht V, Rodrigues G, Reis MG, Ko AI, Begon M, Childs JE. Patterns in Leptospira Shedding in Norway Rats (Rattus norvegicus) from Brazilian Slum Communities at High Risk of Disease Transmission. PLOS Neglected Tropical Diseases 2015, 9: e0003819. PMID: 26047009, PMCID: PMC4457861, DOI: 10.1371/journal.pntd.0003819.Peer-Reviewed Original ResearchConceptsLeptospiral loadHuman infectionsNorway ratsEssential epidemiological informationAge of ratsSpirochetal loadPositive kidneysLeptospiral carriageMAT titersHigh riskLeptospiral infectionEpidemiological informationSignificant positive correlationUrine samplesRatsInfectionMultivariate modelingUrineDisease transmissionKidneyRiskGenome equivalentsSlum communitiesRat populationsLeptospires
2014
Influence of Household Rat Infestation on Leptospira Transmission in the Urban Slum Environment
Costa F, Ribeiro GS, Felzemburgh RD, Santos N, Reis RB, Santos AC, Fraga DB, Araujo WN, Santana C, Childs JE, Reis MG, Ko AI. Influence of Household Rat Infestation on Leptospira Transmission in the Urban Slum Environment. PLOS Neglected Tropical Diseases 2014, 8: e3338. PMID: 25474580, PMCID: PMC4256176, DOI: 10.1371/journal.pntd.0003338.Peer-Reviewed Original ResearchConceptsLeptospira infectionRisk factorsPrediction scoreIndependent risk factorCommunity-based screeningRisk stratification strategiesCase-control studyCharacteristic curve analysisHigh infection riskUrban slum residentsHigh-level transmissionRat infestationAnnual serosurveysSerologic evidenceCase householdsStratification strategiesInfectionInfection riskLeptospirosis transmissionLeptospira transmissionCurve analysisControl householdsNorway ratsSlum settingsRegression modeling
2013
Infections by Leptospira interrogans, Seoul Virus, and Bartonella spp. Among Norway Rats (Rattus norvegicus) from the Urban Slum Environment in Brazil
Costa F, Porter FH, Rodrigues G, Farias H, de Faria MT, Wunder EA, Osikowicz LM, Kosoy MY, Reis MG, Ko AI, Childs JE. Infections by Leptospira interrogans, Seoul Virus, and Bartonella spp. Among Norway Rats (Rattus norvegicus) from the Urban Slum Environment in Brazil. Vector-Borne And Zoonotic Diseases 2013, 14: 33-40. PMID: 24359425, PMCID: PMC3880909, DOI: 10.1089/vbz.2013.1378.Peer-Reviewed Original ResearchConceptsSeoul virusEnzyme-linked immunosorbent assayLeptospiral carriageBartonella sppLeptospira sppZoonotic pathogensLeptospira interrogansNorway ratsReservoir hostsSignificant morbidityHigh prevalenceCommon pathogensRatsWestern blottingImmunofluorescence stainingImmunosorbent assayPrevalenceInfectionPrevalence informationTransmission dynamicsSpecies of BartonellaMultiple pathogensNorway rat populationsUrban slum environmentsCarriage