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
2017
Clinical and parasitological factors in parasite persistence after treatment and clinical cure of cutaneous leishmaniasis
Martínez-Valencia AJ, Daza-Rivera CF, Rosales-Chilama M, Cossio A, Rincón E, Desai MM, Saravia NG, Gómez MA. Clinical and parasitological factors in parasite persistence after treatment and clinical cure of cutaneous leishmaniasis. PLOS Neglected Tropical Diseases 2017, 11: e0005713. PMID: 28704369, PMCID: PMC5526576, DOI: 10.1371/journal.pntd.0005713.Peer-Reviewed Original ResearchConceptsCutaneous leishmaniasisParasite persistencePercent of patientsInitiation of treatmentEnd of treatmentViability of LeishmaniaDisease reactivationTonsillar mucosaClinical cureClinical resolutionTreatment initiationProtective immunityMeglumine antimoniatePersistent infectionMucosal tissuesPrevious episodesTherapeutic cureParasitological factorsProtective factorsPatientsParasitological parametersTreatmentLeishmaniasisWeeksHigher proportionPharmacokinetics of Miltefosine in Children and Adults with Cutaneous Leishmaniasis
del Mar Castro M, Gomez MA, Kip AE, Cossio A, Ortiz E, Navas A, Dorlo TP, Saravia NG. Pharmacokinetics of Miltefosine in Children and Adults with Cutaneous Leishmaniasis. Antimicrobial Agents And Chemotherapy 2017, 61: 10.1128/aac.02198-16. PMID: 27956421, PMCID: PMC5328512, DOI: 10.1128/aac.02198-16.Peer-Reviewed Original ResearchConceptsCutaneous leishmaniasisMiltefosine concentrationsPeripheral blood mononuclear cellsInitiation of treatmentCompletion of treatmentBlood mononuclear cellsEnd of treatmentOutcome of treatmentConcentration-time curvePharmacokinetic clinical trialsClinical responsePediatric patientsPediatric populationMononuclear cellsTherapeutic regimensDrug exposureClinical trialsNoncompartmental analysisParasite eliminationTherapeutic outcomesStudy participantsMiltefosinePatientsLiquid chromatography-tandem mass spectrometryPK differences
2015
Cost-Effectiveness of Meglumine Antimoniate and Caretaker Directly Observed Treatment Miltefosine Treatment for Cutaneous Leishmaniasis for Pediatric Patients in Colombia
Berger B, Cossio A, Pho M, Del Mar Castro M, Prada S, Guerrero R, Bartlett A, Saravia N. Cost-Effectiveness of Meglumine Antimoniate and Caretaker Directly Observed Treatment Miltefosine Treatment for Cutaneous Leishmaniasis for Pediatric Patients in Colombia. Open Forum Infectious Diseases 2015, 2: 115. DOI: 10.1093/ofid/ofv131.35.Peer-Reviewed Original Research
2010
Viability and Burden of Leishmania in Extralesional Sites during Human Dermal Leishmaniasis
Romero I, Téllez J, Suárez Y, Cardona M, Figueroa R, Zelazny A, Saravia N. Viability and Burden of Leishmania in Extralesional Sites during Human Dermal Leishmaniasis. PLOS Neglected Tropical Diseases 2010, 4: e819. PMID: 20856851, PMCID: PMC2939031, DOI: 10.1371/journal.pntd.0000819.Peer-Reviewed Original ResearchConceptsLeishmaniasis patientsExtralesional sitesNormal skinTonsil swabsViable parasitesDissemination of LeishmaniaMucocutaneous leishmaniasis patientsMonocyte samplesPositive samplesLuciferase activityParasite viabilitySkin aspiratesActive diseaseDermal leishmaniasisHuman leishmaniasisBlood monocytesEpidemiologic investigationsPatientsLeishmania DNAParasite burdenHuman infectionsIntracellular amastigotesLesionsSwabsEpidemiological significance
2009
Detection of Leishmania in Unaffected Mucosal Tissues of Patients with Cutaneous Leishmaniasis Caused by Leishmania (Viannia) Species
Figueroa RA, Lozano LE, Romero IC, Cardona MT, Prager M, Pacheco R, Diaz YR, Tellez JA, Saravia NG. Detection of Leishmania in Unaffected Mucosal Tissues of Patients with Cutaneous Leishmaniasis Caused by Leishmania (Viannia) Species. The Journal Of Infectious Diseases 2009, 200: 638-646. PMID: 19569974, PMCID: PMC5056532, DOI: 10.1086/600109.Peer-Reviewed Original ResearchConceptsKinetoplast minicircle DNAMucosal tissuesCutaneous leishmaniasisMucocutaneous leishmaniasisNasal mucosaSwab samplesMucosa of patientsLeishmania speciesPresence of LeishmaniaDetection of LeishmaniaMucosal leishmaniasisMucosal diseaseCutaneous diseaseLeishmania infectionPolymerase chain reactionParasitological evaluationPatientsLeishmania panamensisLeishmania guyanensisMucosaNatural historyLeishmaniasisLeishmania braziliensisChain reactionAsymptomatic presence
2008
Etiologic agent of an epidemic of cutaneous leishmaniasis in Tolima, Colombia.
Rodríguez-Barraquer I, Góngora R, Prager M, Pacheco R, Montero LM, Navas A, Ferro C, Miranda MC, Saravia NG. Etiologic agent of an epidemic of cutaneous leishmaniasis in Tolima, Colombia. American Journal Of Tropical Medicine And Hygiene 2008, 78: 276-82. PMID: 18256429, DOI: 10.4269/ajtmh.2008.78.276.Peer-Reviewed Original ResearchConceptsAmerican cutaneous leishmaniasisCutaneous leishmaniasisEtiologic agentLeishmania guyanensisProbable etiologic agentLeishmaniasis control programLarge epidemicsMonoclonal antibodiesLeishmania isolatesLeishmaniasisPeridomestic settingsZoonotic diseaseL. panamensisEpidemicDomestic transmissionControl programsPresent studyIsoenzyme electrophoresisIsolatesAgentsGuyanensisPatientsDiseaseDiagnosisAntibodies
2006
Resistance to Oxidative Stress Is Associated with Metastasis in Mucocutaneous Leishmaniasis
Acestor N, Masina S, Ives A, Walker J, Saravia NG, Fasel N. Resistance to Oxidative Stress Is Associated with Metastasis in Mucocutaneous Leishmaniasis. The Journal Of Infectious Diseases 2006, 194: 1160-1167. PMID: 16991092, DOI: 10.1086/507646.Peer-Reviewed Original ResearchConceptsMucocutaneous leishmaniasisMetastatic phenotypeMetastatic diseaseCutaneous lesionsMicrobicidal responsesMetastatic disseminationGolden hamstersNasopharyngeal tissuesCytoplasmic peroxiredoxinOxidative stressLeishmania promastigotesNonmetastatic clonesL. panamensisLeishmaniasisHost cellsParasitesPhenotypePatientsMetastasisHeat shockPathogenesisLesionsPeroxidase activityDiseaseDisseminationEvidence for Leishmania (Viannia) Parasites in the Skin and Blood of Patients Before and After Treatment
Vergel C, Palacios R, Cadena H, Posso CJ, Valderrama L, Perez M, Walker J, Travi BL, Saravia NG. Evidence for Leishmania (Viannia) Parasites in the Skin and Blood of Patients Before and After Treatment. The Journal Of Infectious Diseases 2006, 194: 503-511. PMID: 16845635, DOI: 10.1086/505583.Peer-Reviewed Original ResearchConceptsPeripheral blood monocytesAmerican cutaneous leishmaniasisCutaneous leishmaniasisLeishmania parasitesUnaffected skinAnthroponotic transmissionAcquisition of infectionBlood of patientsSource of infectionSand fliesAdult patientsLesion scarTreatment failureAntimonial drugsPatientsNormal skinLeishmaniasisMonocytesZoonotic diseaseLesion bordersSkinTreatmentMolecular detection methodsPositive resultsInfectionResistance to Antimony and Treatment Failure in Human Leishmania (Viannia) Infection
Rojas R, Valderrama L, Valderrama M, Varona MX, Ouellette M, Saravia NG. Resistance to Antimony and Treatment Failure in Human Leishmania (Viannia) Infection. The Journal Of Infectious Diseases 2006, 193: 1375-1383. PMID: 16619185, DOI: 10.1086/503371.Peer-Reviewed Original ResearchConceptsTreatment failureMeglumine antimoniatePrimary resistanceAntimonial drugsSecondary resistanceDrug resistanceHuman Leishmania infectionsEffective immune responseAnthroponotic visceral leishmaniasisAmerican cutaneous leishmaniasisAntimonial therapyStandard treatmentCutaneous diseaseLeishmania infectionTherapeutic responseImmune responseCutaneous leishmaniasisVisceral leishmaniasisAnthroponotic transmissionResistant organismsEffective doseIntracellular amastigotesSusceptible strainsAntimoniatePatients
2003
Efficacy of amodiaquine and sulfadoxine/pyrimethamine in the treatment of malaria not complicated by Plasmodium falciparum in Nariño, Colombia, 1999-2002.
González IJ, Padilla JO, Giraldo LE, Saravia NG. Efficacy of amodiaquine and sulfadoxine/pyrimethamine in the treatment of malaria not complicated by Plasmodium falciparum in Nariño, Colombia, 1999-2002. Biomédica 2003, 23: 38-46. PMID: 12696398, DOI: 10.7705/biomedica.v23i1.1196.Peer-Reviewed Original ResearchConceptsSulfadoxine/pyrimethamineTreatment failureUncomplicated Plasmodium falciparum malariaCombination of amodiaquineEfficacy of amodiaquinePlasmodium falciparum malariaSP treatment failureModerate malaria transmissionAntimalarial drug resistanceTreatment of malariaFalciparum malariaAntimalarial treatmentTherapeutic failureAntimalarial resistanceCurrent doseAntimalarial efficacyMalaria transmissionPatientsAntimalarial drugsDrug resistanceAmodiaquinePlasmodium falciparumTreatment regimesMalariaEfficacy
2002
Performance of OptiMAL® in the diagnosis of Plasmodium vivax and Plasmodium falciparum infections in a malaria referral center in Colombia
Ferro BE, González I, de Carvajal F, Palma GI, Saravia NG. Performance of OptiMAL® in the diagnosis of Plasmodium vivax and Plasmodium falciparum infections in a malaria referral center in Colombia. Memórias Do Instituto Oswaldo Cruz 2002, 97: 731-735. PMID: 12219143, DOI: 10.1590/s0074-02762002000500025.Peer-Reviewed Original ResearchConceptsReferral centerSet of patientsP. vivaxP. falciparumPlasmodium lactate dehydrogenasePerformance of OptiMALEligible consecutive patientsPlasmodium falciparum infectionUrban referral centerNegative blood smearsDiagnosis of malariaOverall diagnostic efficiencyConsecutive patientsFalciparum infectionPlasmodium vivaxMalaria diagnosisDiagnostic utilityBlood smearsMicroscopic diagnosisDipstick methodPatientsDiagnosisVivaxInfectionLactate dehydrogenase
1998
Sensitivity of Leishmania viannia panamensis to Pentavalent Antimony Is Correlated with the Formation of Cleavable DNA-Protein Complexes
Lucumi A, Robledo S, Gama V, Saravia N. Sensitivity of Leishmania viannia panamensis to Pentavalent Antimony Is Correlated with the Formation of Cleavable DNA-Protein Complexes. Antimicrobial Agents And Chemotherapy 1998, 42: 1990-1995. PMID: 9687395, PMCID: PMC105721, DOI: 10.1128/aac.42.8.1990.Peer-Reviewed Original ResearchConceptsSbv/Sodium stibogluconateAntimonial drugsHuman promonocytic cell line UCleavable complexLeishmania Viannia panamensisAntimonial agentsMedian ED50Meglumine antimoniateCell line UEffective doseEffects of camptothecinPentavalent antimonyPromastigotes of LeishmaniaReports of inhibitionInhibitors of topoisomeraseInhibition of topoisomeraseLeishmania donovaniL. panamensisLeishmaniaAntimoniatePatientsRelapseStibogluconateLine UChanges in Expression of Signal Transduction Proteins in T Lymphocytes of Patients with Leprosy
Zea A, Ochoa M, Ghosh P, Longo D, Alvord W, Valderrama L, Falabella R, Harvey L, Saravia N, Moreno L, Ochoa A. Changes in Expression of Signal Transduction Proteins in T Lymphocytes of Patients with Leprosy. Infection And Immunity 1998, 66: 499-504. PMID: 9453602, PMCID: PMC107934, DOI: 10.1128/iai.66.2.499-504.1998.Peer-Reviewed Original ResearchConceptsT cell dysfunctionDNA-binding patternsSignal transduction proteinsSignal transduction moleculesLeprosy patientsCore promoter regionLL patientsTransduction proteinsT-cell receptor zeta chain expressionTransduction moleculesPromoter regionTyrosine kinaseTuberculoid leprosy patientsZeta chain expressionLepromatous leprosy patientsT cell functionSignal transduction alterationsNF-kappaB p65Electrophoretic mobilityImmunologic evaluationT cellsT lymphocytesMycobacterial diseasePatientsAdvanced stage
1993
Leishmania (Viannia) panamensis-specific IgE and IgA antibodies in relation to expression of human tegumentary leishmaniasis.
O'Neil C, Labrada M, Saravia N. Leishmania (Viannia) panamensis-specific IgE and IgA antibodies in relation to expression of human tegumentary leishmaniasis. American Journal Of Tropical Medicine And Hygiene 1993, 49: 181-8. PMID: 8357080, DOI: 10.4269/ajtmh.1993.49.181.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAnimalsAntibodies, ProtozoanAntibody SpecificityAntigens, ProtozoanChildChild, PreschoolCross ReactionsDose-Response Relationship, ImmunologicEnzyme-Linked Immunosorbent AssayFemaleHumansImmunoglobulin AImmunoglobulin EInfantLeishmania braziliensisLeishmaniasis, CutaneousLeishmaniasis, MucocutaneousMaleRadioallergosorbent TestRetrospective StudiesConceptsAmerican tegumentary leishmaniasisIgA antibodiesEnzyme-linked immunosorbent assayTegumentary leishmaniasisRadioallergosorbent testRAST valuesHuman tegumentary leishmaniasisDuration of diseaseIgA levelsMucocutaneous diseaseBiopsy specimenBiopsy specimensCutaneous diseaseSevere formPatientsHeterologous antigensDisease evolutionIgEImmunosorbent assayElevated levelsLeishmaniasisDiseaseInhibition testingAntibodiesSeparate groups
1992
Haemoculture of Leishmania (Viannia) braziliensis from two cases of mucosal leishmaniasis: Re-examination of haematogenous dissemination
Martinez J, Alba, Arias L, Escobar M, Saravia N. Haemoculture of Leishmania (Viannia) braziliensis from two cases of mucosal leishmaniasis: Re-examination of haematogenous dissemination. Transactions Of The Royal Society Of Tropical Medicine And Hygiene 1992, 86: 392-394. PMID: 1440813, DOI: 10.1016/0035-9203(92)90233-3.Peer-Reviewed Original ResearchConceptsMucosal leishmaniasisActive pulmonary tuberculosisMontenegro skin testPeripheral blood leucocytesIsolation of parasitesIndirect fluorescent antibodyCases of leishmaniasisCulture of parasitesHaematogenous disseminationMucosal involvementPulmonary tuberculosisCutaneous lesionsSkin testMucosal diseaseMetastatic spreadMonths durationBlood leucocytesRight legPatientsLeishmania parasitesLeishmania braziliensisL. braziliensisLeishmaniasisFluorescent antibodyLeucocytes
1990
Recurrent 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 ResearchConceptsRecurrent 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
Evaluación de la respuesta de isotipos de inmunoglobulina especifica a Leishmania en leishmaniasis tegumentaria Americana
Labrada M, Weigle K, Valderrama L, Saravia N. Evaluación de la respuesta de isotipos de inmunoglobulina especifica a Leishmania en leishmaniasis tegumentaria Americana. Memórias Do Instituto Oswaldo Cruz 1989, 84: 409-416. PMID: 2520833, DOI: 10.1590/s0074-02761989000300018.Peer-Reviewed Original ResearchConceptsIndirect immunofluorescent antibody testSpecific IgMMonths durationImmunoglobulin subclass responsesLeishmania-specific IgGNormal control volunteersMontenegro skin testTime of recurrenceStaphylococcus aureus CowanImmunofluorescent antibody testL. mexicana amazonensisLeishmania antigenSubclass responsesSkin testingIgM titersSkin testActive lesionsIgG reactiveSpecific IgGSpecific IgG.Control volunteersComplete healingEarly lesionsAntibody testPatients