2020
Profiles of Local and Systemic Inflammation in the Outcome of Treatment of Human Cutaneous Leishmaniasis Caused by Leishmania (Viannia)
Navas A, Fernández O, Gallego-Marín C, del Mar Castro M, Rosales-Chilama M, Murillo J, Cossio A, McMahon-Pratt D, Saravia N, Gómez MA. Profiles of Local and Systemic Inflammation in the Outcome of Treatment of Human Cutaneous Leishmaniasis Caused by Leishmania (Viannia). Infection And Immunity 2020, 88: 10.1128/iai.00764-19. PMID: 31818959, PMCID: PMC7035935, DOI: 10.1128/iai.00764-19.Peer-Reviewed Original ResearchConceptsPeripheral blood mononuclear cellsOutcome of treatmentInnate immune responseCutaneous leishmaniasisTreatment failureCL patientsBiopsy specimensImmune responseResponse of PBMCLocal innate immune responseTreatment of CLBlood mononuclear cellsEnd of treatmentLesion biopsy specimensHuman cutaneous leishmaniasisEfficacy of treatmentGene expression profilesImmune response genesImmune correlatesClinical cureSystemic inflammationPretreatment expressionMeglumine antimoniateMononuclear cellsCare treatment
2018
Development and Evaluation of a Novel Loop-Mediated Isothermal Amplification Assay for Diagnosis of Cutaneous and Visceral Leishmaniasis
Adams ER, Schoone G, Versteeg I, Gomez MA, Diro E, Mori Y, Perlee D, Downing T, Saravia N, Assaye A, Hailu A, Albertini A, Ndung'u JM, Schallig H. Development and Evaluation of a Novel Loop-Mediated Isothermal Amplification Assay for Diagnosis of Cutaneous and Visceral Leishmaniasis. Journal Of Clinical Microbiology 2018, 56: 10.1128/jcm.00386-18. PMID: 29695527, PMCID: PMC6018344, DOI: 10.1128/jcm.00386-18.Peer-Reviewed Original ResearchConceptsVisceral leishmaniasisLAMP assayDiagnostic accuracyProspective cohort trialDiagnosis of CLBone marrow aspirateMinicircle kinetoplast DNANear-patient settingIsothermal Amplification AssayCohort trialVL patientsCL diagnosisVL suspectsMarrow aspiratesMalaria parasitesSwab samplesDiagnosisWhole bloodGold standardInvasive samplesAnalytical specificityClinical samplesAmplification assaysPatientsReference standard
2015
Ex Vivo Host and Parasite Response to Antileishmanial Drugs and Immunomodulators
Gonzalez-Fajardo L, Fernández OL, McMahon-Pratt D, Saravia NG. Ex Vivo Host and Parasite Response to Antileishmanial Drugs and Immunomodulators. PLOS Neglected Tropical Diseases 2015, 9: e0003820. PMID: 26024228, PMCID: PMC4449175, DOI: 10.1371/journal.pntd.0003820.Peer-Reviewed Original ResearchConceptsPeripheral blood mononuclear cellsOutcome of infectionIL-10Meglumine antimoniateIL-13Therapeutic strategiesAntileishmanial drugsTherapeutic responseCytokine secretionInfected peripheral blood mononuclear cellsParasite survivalHuman peripheral blood mononuclear cellsL. panamensis infectionsCutaneous leishmaniasis patientsPro-inflammatory cytokinesBlood mononuclear cellsIL-13 secretionIntracellular parasite survivalAssessment of hostViability of LeishmaniaEfficacy of treatmentPromising therapeutic strategySecretion of TNFInnovative therapeutic strategiesMonocyte-derived macrophages
2014
Miltefosine and Antimonial Drug Susceptibility of Leishmania Viannia Species and Populations in Regions of High Transmission in Colombia
Fernández OL, Diaz-Toro Y, Ovalle C, Valderrama L, Muvdi S, Rodríguez I, Gomez MA, Saravia NG. Miltefosine and Antimonial Drug Susceptibility of Leishmania Viannia Species and Populations in Regions of High Transmission in Colombia. PLOS Neglected Tropical Diseases 2014, 8: e2871. PMID: 24853871, PMCID: PMC4031164, DOI: 10.1371/journal.pntd.0002871.Peer-Reviewed Original ResearchConceptsV. panamensisLine treatmentClinical strainsDrug susceptibilitySecond-line treatmentFirst-line treatmentEmergence of resistancePopulations of LeishmaniaViannia speciesResistant clinical strainsAntimony susceptibilityClinical evidenceMeglumine antimoniatePentavalent antimonialsDermal leishmaniasisEpidemiologic differencesLeishmania VianniaProxy markerIntracellular amastigotesMunicipality of TumacoResistant strainsMiltefosineDisparate susceptibilityDrugsL. panamensis
2012
Novel Approach to In Vitro Drug Susceptibility Assessment of Clinical Strains of Leishmania spp
Fernández O, Diaz-Toro Y, Valderrama L, Ovalle C, Valderrama M, Castillo H, Perez M, Saravia NG. Novel Approach to In Vitro Drug Susceptibility Assessment of Clinical Strains of Leishmania spp. Journal Of Clinical Microbiology 2012, 50: 2207-2211. PMID: 22518860, PMCID: PMC3405580, DOI: 10.1128/jcm.00216-12.Peer-Reviewed Original ResearchConceptsClinical strainsMeglumine antimoniateDrug susceptibilityCell ratioParasite burdenAntileishmanial drugsDrug susceptibility assessmentReduction of infectionParasites/cellIntracellular burdenAntimonial drugsLeishmania panamensisDrug concentrationsEffective dosesHuman macrophagesPresence of drugsL. braziliensisParasite growthHost cell ratioMiltefosineLeishmania sppDrugsL. guyanensisLeishmaniaAntimoniate
2011
Leishmania (Viannia) Infection in the Domestic Dog in Chaparral, Colombia
Santaella J, Ocampo CB, Saravia NG, Méndez F, Góngora R, Gomez MA, Munstermann LE, Quinnell RJ. Leishmania (Viannia) Infection in the Domestic Dog in Chaparral, Colombia. American Journal Of Tropical Medicine And Hygiene 2011, 84: 674-680. PMID: 21540374, PMCID: PMC3083732, DOI: 10.4269/ajtmh.2011.10-0159.Peer-Reviewed Original ResearchConceptsCutaneous leishmaniasisSkin biopsy specimensHuman cutaneous leishmaniasisReservoirs of LeishmaniaEnzyme-linked immunosorbentAmerican cutaneous leishmaniasisPrevalence of infectionBiopsy specimensLeishmania infectionRisk factorsCanine infectionLeishmania guyanensisBuffy coatL. braziliensisDogsInfectionLeishmaniasisPeridomestic transmissionL. guyanensisPositive resultsBlottingMore testsDomestic dogsGuyanensisBiopsy
2010
T-bet, GATA-3, and Foxp3 Expression and Th1/Th2 Cytokine Production in the Clinical Outcome of Human Infection with Leishmania (Viannia) Species
Díaz YR, Rojas R, Valderrama L, Saravia NG. T-bet, GATA-3, and Foxp3 Expression and Th1/Th2 Cytokine Production in the Clinical Outcome of Human Infection with Leishmania (Viannia) Species. The Journal Of Infectious Diseases 2010, 202: 406-415. PMID: 20583921, PMCID: PMC4850829, DOI: 10.1086/653829.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAgedAnimalsCoculture TechniquesCytokinesFemaleForkhead Transcription FactorsGATA3 Transcription FactorGene ExpressionGene Expression ProfilingHumansLeishmaniaLeishmaniasisLeukocytes, MononuclearMaleMiddle AgedT-Box Domain ProteinsTh1 CellsTh2 CellsTreatment OutcomeYoung AdultConceptsGATA-3 expressionT cell differentiationTumor necrosis factor alphaT-bet expressionNecrosis factor alphaT-betHuman infectionsGATA-3Th2 responsesAsymptomatic infectionFactor alphaInterleukin-4Cutaneous leishmaniasisInterferon gammaTh1/Th2 cytokine productionTh1/Th2 cytokine responseHigher T-bet expressionTh1/Th2 responseActive recurrent diseaseRecurrent cutaneous leishmaniasisTh2 cytokine responsesExperimental cutaneous leishmaniasisProinflammatory cytokine interferon-gammaInterleukin-10 secretionTh2 cytokine production
2008
Antimony Resistance and Trypanothione in Experimentally Selected and Clinical Strains of Leishmania panamensis
Goyeneche-Patino DA, Valderrama L, Walker J, Saravia NG. Antimony Resistance and Trypanothione in Experimentally Selected and Clinical Strains of Leishmania panamensis. Antimicrobial Agents And Chemotherapy 2008, 52: 4503-4506. PMID: 18824610, PMCID: PMC2592887, DOI: 10.1128/aac.01075-08.Peer-Reviewed Original Research
2002
Gender Is a Major Determinant of the Clinical Evolution and Immune Response in Hamsters Infected with Leishmania spp
Travi BL, Osorio Y, Melby PC, Chandrasekar B, Arteaga L, Saravia NG. Gender Is a Major Determinant of the Clinical Evolution and Immune Response in Hamsters Infected with Leishmania spp. Infection And Immunity 2002, 70: 2288-2296. PMID: 11953362, PMCID: PMC127932, DOI: 10.1128/iai.70.5.2288-2296.2002.Peer-Reviewed Original ResearchConceptsFemale animalsGender-related differencesMale animalsImmune responseInterleukin-4Lesion sizeDistant cutaneous sitesPermissive immune responsePrepubertal male animalsSevere cutaneous lesionsSex hormone statusLeishmania sppTGF-beta mRNASeverity of diseaseAdult male animalsGreater lesion sizeGrowth factor betaGreater parasite burdenIntralesional expressionCutaneous sitesIL-10Lymph nodesChronic lesionsClinical evolutionCutaneous infections
1998
Epidemiologic, genetic, and clinical associations among phenotypically distinct populations of Leishmania (Viannia) in Colombia.
Saravia N, Segura I, Holguin A, Santrich C, Valderrama L, Ocampo C. Epidemiologic, genetic, and clinical associations among phenotypically distinct populations of Leishmania (Viannia) in Colombia. American Journal Of Tropical Medicine And Hygiene 1998, 59: 86-94. PMID: 9684634, DOI: 10.4269/ajtmh.1998.59.86.Peer-Reviewed Original Research
1997
In Situ Characterization of the Human Host Response to Leishmania panamensis
Palma G, Saravia N. In Situ Characterization of the Human Host Response to Leishmania panamensis. American Journal Of Dermatopathology 1997, 19: 585-590. PMID: 9415615, DOI: 10.1097/00000372-199712000-00006.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAnimalsAntibodies, ProtozoanAntigen-Antibody ReactionsAntigens, ProtozoanBiomarkersBiopsyCD4-Positive T-LymphocytesCD8-Positive T-LymphocytesEpidermisFluorescent Antibody Technique, IndirectGranulocytesGranulomaHumansImmunity, CellularImmunohistochemistryLeishmaniaLeishmaniasisLymphocyte ActivationMaleMiddle AgedNecrosisRegression AnalysisSkinConceptsHuman host responseHost responseLeishmania panamensisPresence of amastigotesT cell subpopulationsImmune response dataIndirect immunoperoxidase methodCD8 ratioDermal infiltrateMale patientsHistopathologic changesParticular cell populationPrognostic indicatorLeishmania infectionSkin biopsiesPlasma cellsT cellsDermal distributionCutaneous leishmaniasisProspective analysisB cellsB lymphocytesUpper dermisImmunoperoxidase methodDisease evolution
1991
Leishmanin skin test standardization and evaluation of safety, dose, storage, longevity of reaction and sensitization.
Weigle K, Valderrama L, Arias A, Santrich C, Saravia N. Leishmanin skin test standardization and evaluation of safety, dose, storage, longevity of reaction and sensitization. American Journal Of Tropical Medicine And Hygiene 1991, 44: 260-71. PMID: 2035747, DOI: 10.4269/ajtmh.1991.44.260.Peer-Reviewed Original Research
1990
Infectivity of the subspecies of the Leishmania braziliensis complex in vivo and in vitro.
Rey J, Travi B, Valencia A, Saravia N. Infectivity of the subspecies of the Leishmania braziliensis complex in vivo and in vitro. American Journal Of Tropical Medicine And Hygiene 1990, 43: 623-31. PMID: 2267967, DOI: 10.4269/ajtmh.1990.43.623.Peer-Reviewed Original ResearchRecurrent lesions in human Leishmania braziliensis infection—reactivation or reinfection?
Saravia N, Segura I, Labrada L, Weigle K, Giannini S, Pacheco R, Goncalves A. Recurrent lesions in human Leishmania braziliensis infection—reactivation or reinfection? The Lancet 1990, 336: 398-402. PMID: 1974943, DOI: 10.1016/0140-6736(90)91945-7.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsDNAHumansKaryotypingLeishmaniaLeishmania braziliensisLeishmaniasisPolymorphism, GeneticRecurrenceConceptsRecurrent lesionsInitial lesionLonger disease-free intervalDisease-free intervalAmerican tegumentary leishmaniasisRecurrent diseaseEndogenous reactivationExogenous reinfectionVaccination strategiesClinical dataPatientsTegumentary leishmaniasisLesionsTreatment evaluationRecurrent strainsLeishmania braziliensisIdentical strainsLatter groupReinfectionRestriction endonuclease analysisEndonuclease analysisStrain pairsMolecular karyotypingKaryotype profilePolymorphism
1989
The Relationship of Leishmania braziliensis Subspecies and Immune Response to Disease Expression in New World Leishmaniasis
Saravia N, Valderrama L, Labrada M, Holguin A, Navas C, Palma G, Weigle K. The Relationship of Leishmania braziliensis Subspecies and Immune Response to Disease Expression in New World Leishmaniasis. The Journal Of Infectious Diseases 1989, 159: 725-735. PMID: 2647862, DOI: 10.1093/infdis/159.4.725.Peer-Reviewed Original ResearchMeSH KeywordsAnalysis of VarianceAnimalsAntibodies, ProtozoanAntigens, ProtozoanDose-Response Relationship, ImmunologicFluorescent Antibody TechniqueHost-Parasite InteractionsHumansHypersensitivity, DelayedImmune SeraImmunity, CellularKineticsLeishmaniaLeishmania braziliensisLeishmaniasisLeishmaniasis, MucocutaneousLymphocyte ActivationRegression AnalysisConceptsCutaneous DTHLeishmania antigenBraziliensis infectionTegumentary leishmaniasisIFAT titersDisease formsVitro lymphocyte proliferative responseCutaneous DTH responseHuman tegumentary leishmaniasisL. braziliensis infectionLymphocyte proliferative responsesImmune response parametersHigher IFAT titersNew World leishmaniasisPanamensis infectionDTH responseMucocutaneous diseaseClinical presentationLesion durationCutaneous diseaseDisease presentationImmune mechanismsImmune responseProliferative responseTime of evolutionDeteccion de amastigotas en Leishmaniasis cutanea y mucocutanea por el metodo de inmunoperoxidasa, usando anticuerpo policlonal: sensibilidad y especificidad comparadas con metodos convencionales de diagnostico
Salinas G, Valderrama L, Palma G, Montes G, Saravia N. Deteccion de amastigotas en Leishmaniasis cutanea y mucocutanea por el metodo de inmunoperoxidasa, usando anticuerpo policlonal: sensibilidad y especificidad comparadas con metodos convencionales de diagnostico. Memórias Do Instituto Oswaldo Cruz 1989, 84: 53-60. PMID: 2181244, DOI: 10.1590/s0074-02761989000100010.Peer-Reviewed Original Research
1988
Behavior of Leishmania braziliensis s.l. in golden hamsters: evolution of the infection under different experimental conditions.
Travi B, Rey-Ladino J, Saravia N. Behavior of Leishmania braziliensis s.l. in golden hamsters: evolution of the infection under different experimental conditions. Journal Of Parasitology 1988, 74: 1059-62. PMID: 3193329, DOI: 10.2307/3282237.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCricetinaeHydrocortisoneLeishmaniaLeishmania braziliensisLeishmaniasisLymph NodesMesocricetus