Featured Publications
Vaccination With Leptospira interrogans PF07598 Gene Family-Encoded Virulence Modifying Proteins Protects Mice From Severe Leptospirosis and Reduces Bacterial Load in the Liver and Kidney
Chaurasia R, Salovey A, Guo X, Desir G, Vinetz JM. Vaccination With Leptospira interrogans PF07598 Gene Family-Encoded Virulence Modifying Proteins Protects Mice From Severe Leptospirosis and Reduces Bacterial Load in the Liver and Kidney. Frontiers In Cellular And Infection Microbiology 2022, 12: 926994. PMID: 35837473, PMCID: PMC9274288, DOI: 10.3389/fcimb.2022.926994.Peer-Reviewed Original ResearchConceptsLethal challenge infectionChallenge infectionBacterial loadC3H/HeJ miceKey target organClinical pathogenesisSevere leptospirosisOrgan infectionProtein immunizationHeJ miceSerovar CanicolaTarget organsAnimal modelsLeptospirosis pathogenesisCellular pathogenesisMicePathogenesisInfectionLeptospira interrogansVirulence factorsModifying proteinsImmunizationKidneyLeptospirosisLiverInsights into Plasmodium vivax Asymptomatic Malaria Infections and Direct Skin-Feeding Assays to Assess Onward Malaria Transmission in the Amazon.
Moreno M, Torres K, Tong C, García Castillo SS, Carrasco-Escobar G, Guedez G, Torres L, Herrera-Varela M, Guerra L, Guzman-Guzman M, Wong D, Ramirez R, Llanos-Cuentas A, Conn JE, Gamboa D, Vinetz JM. Insights into Plasmodium vivax Asymptomatic Malaria Infections and Direct Skin-Feeding Assays to Assess Onward Malaria Transmission in the Amazon. American Journal Of Tropical Medicine And Hygiene 2022, 107: 154-161. PMID: 35895359, PMCID: PMC9294676, DOI: 10.4269/ajtmh.21-1217.Peer-Reviewed Original ResearchConceptsDirect skin feeding assaysMalaria infectionP. vivax malaria infectionsAsymptomatic malaria infectionsVivax malaria infectionMosquito feeding assaysDiverse epidemiological settingsCohort studySymptomatic infectionAsymptomatic individualsAsymptomatic infectionSymptomatic participantsParasite carriersPlasmodium vivaxEpidemiological settingsMalaria transmissionPlasmodium gametocytesInfectionMajor mosquito vectorsDisease transmissibilityParasite infectionLongitudinal studyMosquito vectorsInfection intensityInfectivity
2023
A prospective cohort study linking migration, climate, and malaria risk in the Peruvian Amazon
Gunderson A, Recalde-Coronel C, Zaitchik B, Yori P, Pinedo S, Olortegui M, Kosek M, Vinetz J, Pan W. A prospective cohort study linking migration, climate, and malaria risk in the Peruvian Amazon. Epidemiology And Infection 2023, 151: e202. PMID: 38031496, PMCID: PMC10753477, DOI: 10.1017/s0950268823001838.Peer-Reviewed Original ResearchOptimization of Plasmodium vivax infection of colonized Amazonian Anopheles darlingi
Andrade A, Santos N, Bastos A, Pontual J, Araújo C, Lima A, Martinez L, Ferreira A, Aguiar A, Teles C, Guido R, Santana R, Lopes S, Medeiros J, Rizopoulos Z, Vinetz J, Campo B, Lacerda M, Araújo M. Optimization of Plasmodium vivax infection of colonized Amazonian Anopheles darlingi. Scientific Reports 2023, 13: 18207. PMID: 37875508, PMCID: PMC10598059, DOI: 10.1038/s41598-023-44556-y.Peer-Reviewed Original ResearchConceptsP. vivax liver stagesPlasmodium vivax infectionPlasmodium vivax sporozoitesLiver stage parasitesP. vivax sporozoitesFemale anopheline mosquitoesVivax infectionLiver stagesHepatocyte infectionVaccine developmentStage parasitesSporozoite viabilityMembrane feeding systemSporozoite productionDrug developmentSporozoitesAnopheline mosquitoesInfectionParasite biologyArtificial membrane feeding systemPatientsSimple centrifugation methodSerum replacementBloodNatural Infection of Nyssorhynchus darlingi and Nyssorhynchus benarrochi B with Plasmodium during the Dry Season in the Understudied Low-Transmission Setting of Datem del Marañon Province, Amazonian Peru
Conn J, Bickersmith S, Saavedra M, Morales J, Alava F, Rodriguez G, del Aguila Morante C, Tong C, Alvarez-Antonio C, Huanahui J, Vinetz J, Gamboa D. Natural Infection of Nyssorhynchus darlingi and Nyssorhynchus benarrochi B with Plasmodium during the Dry Season in the Understudied Low-Transmission Setting of Datem del Marañon Province, Amazonian Peru. American Journal Of Tropical Medicine And Hygiene 2023, 109: 288-295. PMID: 37364858, PMCID: PMC10397451, DOI: 10.4269/ajtmh.23-0058.Peer-Reviewed Original ResearchConceptsLow transmission settingsAnnual parasite indexEntomological inoculation rateHuman biting rateHuman landing catchesMinistry of HealthMalaria hotspotsInfective bitesPlasmodium vivaxMalaria transmissionLanding catchesPlasmodium falciparumMalaria researchNatural infectionInoculation rateNyssorhynchus darlingiBiting rateRiverine villagesParasite indexBiteVector control unitsDarlingiLoreto DepartmentInfectionVivax
2022
Epidemiological characteristics of P. vivax asymptomatic infections in the Peruvian Amazon
Villasis E, Castillo S, Guzman M, Torres J, Gomez J, Garro K, Cordova AM, Reategui C, Abanto C, Vinetz J, Gamboa D, Torres K. Epidemiological characteristics of P. vivax asymptomatic infections in the Peruvian Amazon. Frontiers In Cellular And Infection Microbiology 2022, 12: 901423. PMID: 36118037, PMCID: PMC9471197, DOI: 10.3389/fcimb.2022.901423.Peer-Reviewed Original ResearchConceptsCase-control studyAntimalarial treatmentMalaria symptomsHematological parametersControl individualsCommon malaria symptomsNegative microscopy resultsHistory of comorbiditiesMalaria control measuresClinical immunityMalaria microscopyAsymptomatic infectionMalaria infectionEpidemiological characteristicsChronic infectionMost infectionsMalaria eliminationDay 21Positive qPCR resultsInfected individualsPopulation screeningSYM groupInfectionQPCR resultsLast monthSerological and molecular epidemiology of leptospirosis and the role of dogs as sentinel for human infection in Nigeria
Pilau NN, Lubar AA, Daneji AI, Mera UM, Magaji AA, Abiayi EA, Chaiboonma KL, Busayo EI, Vinetz JM, Matthias MA. Serological and molecular epidemiology of leptospirosis and the role of dogs as sentinel for human infection in Nigeria. Heliyon 2022, 8: e09484. PMID: 35647333, PMCID: PMC9136256, DOI: 10.1016/j.heliyon.2022.e09484.Peer-Reviewed Original ResearchProspective cross-sectional studyCarriers of leptospiresCross-sectional studySymptomatic dogsQuantitative real-time PCRRole of dogsBacteriological prevalenceReal-time PCRUnvaccinated animalsHigh riskLeptospiral infectionInfection rateHuman infectionsPublic health riskMolecular epidemiologyStray dogsInfectionDogsCulture isolationO-antigen regionHealth risksLeptospirosisLipopolysaccharideSerogroupsStrong determinantRelative contribution of low-density and asymptomatic infections to Plasmodium vivax transmission in the Amazon: pooled analysis of individual participant data from population-based cross-sectional surveys
Ferreira MU, Corder RM, Johansen IC, Kattenberg JH, Moreno M, Rosas-Aguirre A, Ladeia-Andrade S, Conn JE, Llanos-Cuentas A, Gamboa D, Rosanas-Urgell A, Vinetz JM. Relative contribution of low-density and asymptomatic infections to Plasmodium vivax transmission in the Amazon: pooled analysis of individual participant data from population-based cross-sectional surveys. The Lancet Regional Health - Americas 2022, 9: 100169. PMID: 35663000, PMCID: PMC9161731, DOI: 10.1016/j.lana.2021.100169.Peer-Reviewed Original ResearchIndividual participant dataPolymerase chain reactionClinical manifestationsParasite densityMosquito infectionMalaria transmissionPopulation-based cross-sectional surveyParticipant dataMalaria elimination strategiesPopulation-based surveyHigh parasite densityCross-sectional surveyInfected childrenClinical symptomsAsymptomatic infectionUS National InstitutesAsymptomatic carriersParasite carriersInfectious reservoirVivax transmissionInfectionFundação de Amparo à PesquisaChain reactionNational InstituteElimination strategy
2021
Asymptomatic Plasmodium vivax malaria in the Brazilian Amazon: Submicroscopic parasitemic blood infects Nyssorhynchus darlingi
Almeida GG, Costa PAC, da Silva Araujo M, Gomes GR, Carvalho AF, Figueiredo MM, Pereira DB, Tada MS, Medeiros JF, da Silva Soares I, Carvalho LH, Kano FS, de Castro M, Vinetz JM, Golenbock DT, do Valle Antonelli L, Gazzinelli RT. Asymptomatic Plasmodium vivax malaria in the Brazilian Amazon: Submicroscopic parasitemic blood infects Nyssorhynchus darlingi. PLOS Neglected Tropical Diseases 2021, 15: e0009077. PMID: 34714821, PMCID: PMC8555776, DOI: 10.1371/journal.pntd.0009077.Peer-Reviewed Original ResearchConceptsAsymptomatic individualsP. vivaxP. vivax malaria patientsP. vivax infectionVivax malaria patientsPlasmodium vivax malariaLow endemicity areaMalaria patientsSymptomatic patientsAsymptomatic infectionVivax malariaVivax infectionInfectious reservoirLow parasitemiaUninfected controlsEndemic regionsMalaria transmissionInfectivity ratesMalaria parasitesBiochemical parametersParasitemiaBloodPotential rolePatientsInfectionHeterogeneity in response to serological exposure markers of recent Plasmodium vivax infections in contrasting epidemiological contexts
Rosado J, White MT, Longley RJ, Lacerda M, Monteiro W, Brewster J, Sattabongkot J, Guzman-Guzman M, Llanos-Cuentas A, Vinetz JM, Gamboa D, Mueller I. Heterogeneity in response to serological exposure markers of recent Plasmodium vivax infections in contrasting epidemiological contexts. PLOS Neglected Tropical Diseases 2021, 15: e0009165. PMID: 33591976, PMCID: PMC7909627, DOI: 10.1371/journal.pntd.0009165.Peer-Reviewed Original ResearchConceptsSerological exposure markersBlood-stage infectionLow transmission settingsP. vivax infectionPlasmodium vivax infectionHigh transmission settingsVivax infectionTransmission settingsAntibody titersAntibody responseExposure markersDifferent transmission intensitiesIgG responsesSerological markersPrevious infectionReceiver Operating Characteristic (ROC) analysisEndemic settingsMalaria eliminationPeruvian cohortOperating characteristics analysisP. vivaxMalaria controlRecent exposureInfectionEpidemiological context
2018
Experimental Infection of Rattus norvegicus by the Group II Intermediate Pathogen, Leptospira licerasiae.
Fernandez C, Lubar AA, Vinetz JM, Matthias MA. Experimental Infection of Rattus norvegicus by the Group II Intermediate Pathogen, Leptospira licerasiae. American Journal Of Tropical Medicine And Hygiene 2018, 99: 275-280. PMID: 29943708, PMCID: PMC6090328, DOI: 10.4269/ajtmh.17-0844.Peer-Reviewed Original ResearchConceptsOral routeHuman seroreactivitySprague-Dawley ratsRoute of infectionExperimental infection modelQuantitative polymerase chain reactionTranscutaneous routeGastric gavageParenteral inoculationClinical historyPolymerase chain reactionRenal colonizationGroup IIKidney tissuePeruvian Amazon cityExperimental infectionInfectionInfection modelChain reactionSeroreactivityHigh rateRatsReservoir hostsAmazon cityGavageAcceptability of a herd immunity-focused, transmission-blocking malaria vaccine in malaria-endemic communities in the Peruvian Amazon: an exploratory study
White SE, Harvey SA, Meza G, Llanos A, Guzman M, Gamboa D, Vinetz JM. Acceptability of a herd immunity-focused, transmission-blocking malaria vaccine in malaria-endemic communities in the Peruvian Amazon: an exploratory study. Malaria Journal 2018, 17: 179. PMID: 29703192, PMCID: PMC5921293, DOI: 10.1186/s12936-018-2328-z.Peer-Reviewed Original ResearchConceptsTransmission-blocking malaria vaccineTransmission-blocking vaccinesMalaria vaccineMalaria transmission-blocking vaccineMalaria hypoendemic regionMalaria vaccine strategyProspective cohort studyMalaria-endemic communitiesMalaria-endemic regionsPre-validated questionnaireCohort studyVaccine strategiesMalaria infectionMethodsThe studyVaccineMalaria controlMalaria researchMultiple injectionsOne-thirdIndustrialized worldInjectionAcceptabilityCohortInfectionStudyContinuous Supply of Plasmodium vivax Sporozoites from Colonized Anopheles darlingi in the Peruvian Amazon
Moreno M, Tong-Rios C, Orjuela-Sanchez P, Carrasco-Escobar G, Campo B, Gamboa D, Winzeler EA, Vinetz JM. Continuous Supply of Plasmodium vivax Sporozoites from Colonized Anopheles darlingi in the Peruvian Amazon. ACS Infectious Diseases 2018, 4: 541-548. PMID: 29465219, PMCID: PMC5902790, DOI: 10.1021/acsinfecdis.7b00195.Peer-Reviewed Original ResearchConceptsPlasmodium vivax sporozoitesDonor seraPlasmodium vivax liver stagesStandard membrane feeding assaysMalaria-endemic settingsMembrane feeding assaysSporozoite productionInfectious blood mealInfected subjectsNaïve serumBlood-fed mosquitoesLiver stagesDonor bloodBlood samplesVaccine developmentMosquito midgutSerumBlood mealBloodMosquito survivalSporozoitesMosquitoesAnophelesAnticoagulantsInfectionAsymptomatic Plasmodium vivax parasitaemia in the low-transmission setting: the role for a population-based transmission-blocking vaccine for malaria elimination
Martin TCS, Vinetz JM. Asymptomatic Plasmodium vivax parasitaemia in the low-transmission setting: the role for a population-based transmission-blocking vaccine for malaria elimination. Malaria Journal 2018, 17: 89. PMID: 29466991, PMCID: PMC5822557, DOI: 10.1186/s12936-018-2243-3.Peer-Reviewed Original ResearchConceptsTransmission-blocking vaccinesPlasmodium vivax parasitaemiaLow transmission settingsControl of transmissionVivax parasitaemiaChloroquine resistanceAsymptomatic carriageMalaria eliminationNew therapiesPlasmodium vivaxImportant causeCarrier stateImmunological interactionsVaccineOnward infectionInfectionParasite transmissionEradication effortsMosquitoesMorbidityParasitaemiaTherapyMortalityDiagnosisVivax
2006
Experimental Infection of Anopheles Darlingi Mosquitoes by Plasmodium Vivax From Naturally Infected Patients in the Peruvian Amazon
Bharti A, Chuquiyauri R, Segura E, Lopez V, Stancil J, Llanos A, Vinetz J. Experimental Infection of Anopheles Darlingi Mosquitoes by Plasmodium Vivax From Naturally Infected Patients in the Peruvian Amazon. Journal Of Investigative Medicine 2006, 54: 134-134. DOI: 10.1177/108155890605401s197.Peer-Reviewed Original Research314 EXPERIMENTAL INFECTION OF ANOPHELES DARLINGI MOSQUITOES BY PLASMODIUM VIVAX FROM NATURALLY INFECTED PATIENTS IN THE PERUVIAN AMAZON.
Bharti A, Chuquiyauri R, Segura E, Lopez V, Stancil J, Llanos A, Vinetz J. 314 EXPERIMENTAL INFECTION OF ANOPHELES DARLINGI MOSQUITOES BY PLASMODIUM VIVAX FROM NATURALLY INFECTED PATIENTS IN THE PERUVIAN AMAZON. Journal Of Investigative Medicine 2006, 54: s134. DOI: 10.2310/6650.2005.x0004.313.Peer-Reviewed Original ResearchP. vivaxPlasmodium vivaxP. vivax infectionIncidence of malariaLife-threatening diseaseTransmission of infectionOocyst loadMembrane feeding techniqueSymptomatic patientsArtificial membrane feeding techniqueVivax malariaVivax infectionInterventional methodsPatientsInfected mosquitoesExperimental infectionDarlingi mosquitoesMosquito midgutVivaxAlternative interventionsInfectionMicroscopic examinationCurrent control measuresInfected midgutsMalaria
2000
Detection of pathogenic Leptospira spp. infections among mammals captured in the Peruvian Amazon basin region.
Bunnell J, Hice C, Watts D, Montrueil V, Tesh R, Vinetz J. Detection of pathogenic Leptospira spp. infections among mammals captured in the Peruvian Amazon basin region. American Journal Of Tropical Medicine And Hygiene 2000, 63: 255-8. PMID: 11421373, DOI: 10.4269/ajtmh.2000.63.255.Peer-Reviewed Original Research