2015
Parasitological Confirmation and Analysis of Leishmania Diversity in Asymptomatic and Subclinical Infection following Resolution of Cutaneous Leishmaniasis
Rosales-Chilama M, Gongora RE, Valderrama L, Jojoa J, Alexander N, Rubiano LC, Cossio A, Adams ER, Saravia NG, Gomez MA. Parasitological Confirmation and Analysis of Leishmania Diversity in Asymptomatic and Subclinical Infection following Resolution of Cutaneous Leishmaniasis. PLOS Neglected Tropical Diseases 2015, 9: e0004273. PMID: 26659114, PMCID: PMC4684356, DOI: 10.1371/journal.pntd.0004273.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAgedAged, 80 and overAsymptomatic InfectionsBlotting, SouthernChildCluster AnalysisColombiaDNA, HelminthDNA, KinetoplastFemaleGenetic VariationGenotypeHumansLeishmaniaLeishmaniasis, CutaneousMaleMiddle AgedMolecular Sequence DataPhylogenyPolymerase Chain ReactionRNA, Small CytoplasmicSequence Analysis, DNASignal Recognition ParticleYoung AdultConceptsCutaneous leishmaniasisSubclinical infectionParasitological confirmationAsymptomatic infectionEndemic areasHistory of CLTest-positive individualsImmunological evidenceViability of LeishmaniaMucosal swab samplesPersistent subclinical infectionMucosal tissue samplesReservoir of infectionActive diseaseLeishmania kDNALeishmania infectionPositive individualsPersistent infectionBlood monocytesParasite burdenInfectionParasite populationsSwab samplesTransmission of diseaseTissue samples
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
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
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 resultsInfection
2005
Amplification of human DNA by primers targeted to Leishmania kinetoplast DNA and post-genome considerations in the detection of parasites by a polymerase chain reaction.
Vergel C, Walker J, SARAVIA NG. Amplification of human DNA by primers targeted to Leishmania kinetoplast DNA and post-genome considerations in the detection of parasites by a polymerase chain reaction. American Journal Of Tropical Medicine And Hygiene 2005, 72: 423-9. PMID: 15827280, DOI: 10.4269/ajtmh.2005.72.423.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBlotting, SouthernChildChild, PreschoolCloning, MolecularColombiaDNADNA PrimersDNA, KinetoplastGenome, ProtozoanHumansLeishmaniaPolymerase Chain ReactionConceptsMolecular amplification techniquesPerformance of primersPolymerase chain reaction productsAmplification techniquesMonocyte DNADNA probesLeishmania kinetoplast DNANew applicationsChain reaction productsDNA amplificationHuman DNA sequencesDNA sequencesDetection of parasitesPolymerase chain reaction
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 ResearchMeSH KeywordsAnimalsColombiaHumansL-Lactate DehydrogenaseMalaria, FalciparumMalaria, VivaxPolymerase Chain ReactionPredictive Value of TestsReagent StripsSensitivity and SpecificityConceptsReferral 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
2000
Evaluation of Polymerase Chain Reaction, Adenosine Deaminase, and Interferon-γ in Pleural Fluid for the Differential Diagnosis of Pleural Tuberculosis
Villegas M, Labrada L, Saravia N. Evaluation of Polymerase Chain Reaction, Adenosine Deaminase, and Interferon-γ in Pleural Fluid for the Differential Diagnosis of Pleural Tuberculosis. CHEST Journal 2000, 118: 1355-1364. PMID: 11083686, DOI: 10.1378/chest.118.5.1355.Peer-Reviewed Original ResearchMeSH KeywordsAdenosine DeaminaseAge FactorsBacteriological TechniquesBayes TheoremBiopsyBloodChi-Square DistributionDiagnosis, DifferentialDNA, BacterialFemaleFeverHumansInterferon-gammaMaleMiddle AgedMycobacterium tuberculosisPleural DiseasesPleural EffusionPleural NeoplasmsPolymerase Chain ReactionPredictive Value of TestsSensitivity and SpecificitySputumTuberculosis, PleuralConceptsIFN-gamma levelsADA activity determinationPleural tuberculosisPolymerase chain reactionPleural effusionPleural fluidADA activityNonspecific clinical presentationPleural biopsy specimensTuberculous pleural effusionChain reactionAlternative diagnostic strategiesDifferent clinical settingsNegative predictive valueMeasurement of interferonAdenosine deaminase activityCombination of PCRMalignant etiologyUndetermined etiologyClinical presentationPaucibacillary natureClinical variablesPatient populationPleural biopsyDiagnostic challenge
1998
Frequency of the Asn-108 and Thr-108 point mutations in the dihydrofolate reductase gene in Plasmodium falciparum from southwest Colombia.
Giraldo L, Acosta M, Labrada L, Praba A, Montenegro-James S, Saravia N, Krogstad D. Frequency of the Asn-108 and Thr-108 point mutations in the dihydrofolate reductase gene in Plasmodium falciparum from southwest Colombia. American Journal Of Tropical Medicine And Hygiene 1998, 59: 124-8. PMID: 9684639, DOI: 10.4269/ajtmh.1998.59.124.Peer-Reviewed Original Research