2025
Household practices and infrastructure associated with high Plasmodium falciparum infection rates among children under five years old in Northern Uganda
Echodu R, Ajolorwot S, Aryemo F, Nyeko C, Okot J, Iwiru T, Nakiwu V, Bei A, DeBlasio M, Turyasingura N, Zhang E, Parikh S. Household practices and infrastructure associated with high Plasmodium falciparum infection rates among children under five years old in Northern Uganda. Malaria Journal 2025, 24: 181. PMID: 40484941, PMCID: PMC12145591, DOI: 10.1186/s12936-025-05288-8.Peer-Reviewed Original ResearchConceptsIndoor residual sprayingArtemisinin-based combination therapyMalaria prevalenceCoverage of indoor residual sprayingPlasmodium falciparum infection rateIndoor residual spraying coverageEffective malaria preventionHighest malaria prevalenceInsecticide-treated netsConclusionA high prevalenceReduce malaria prevalenceHealth-seeking behaviorYears of ageMalaria preventionCombination therapyInsecticidal netsPlasmodium falciparumGovernment health centersBed netsMethodsA cross-sectional surveyPositive prevalenceResidual sprayingUntreated netsPre-tested questionnaireMosquito netsMonitoring molecular markers associated with antimalarial drug resistance in south-east Senegal from 2021 to 2023
Wade A, Sene S, Caspar E, Diallo F, Platon L, Thiebaut L, Pouye M, Ba A, Thiam L, Fall M, Sadio B, Desamours I, Guerra N, Hagadorn K, Amambua-Ngwa A, Bei A, Vigan-Womas I, Ménard D, Mbengue A. Monitoring molecular markers associated with antimalarial drug resistance in south-east Senegal from 2021 to 2023. Journal Of Antimicrobial Chemotherapy 2025, 80: 828-839. PMID: 39846779, PMCID: PMC11879165, DOI: 10.1093/jac/dkaf006.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAntimalarialsArtemisininsChildChild, PreschoolDrug CombinationsDrug ResistanceFemaleHumansMalaria, FalciparumMaleMembrane Transport ProteinsMiddle AgedMultidrug Resistance-Associated ProteinsMutationPlasmodium falciparumProtozoan ProteinsPyrimethamineSenegalSulfadoxineTetrahydrofolate DehydrogenaseYoung AdultConceptsArtemisinin-based combination therapyMolecular markers associated with antimalarial drug resistanceArtemisinin-based combination therapy efficacyP. falciparum infectionSulfadoxine-pyrimethamine resistanceAntimalarial drug resistanceInvestigated gene polymorphismsCQ-RResistance in vitroVenous blood samplesClinical outcome studiesI356TK76TPfcrt mutationsChloroquine resistanceAntimalarial resistancePfmdr-1CQ useMalaria eliminationCombination therapyResistance surveillanceGene polymorphismsPlasmodium falciparumDrug resistanceAmplicon deep sequencing
2024
Understanding the significance of oxygen tension on the biology of Plasmodium falciparum blood stages: From the human body to the laboratory
Nahid D, Coffey K, Bei A, Cordy R. Understanding the significance of oxygen tension on the biology of Plasmodium falciparum blood stages: From the human body to the laboratory. PLOS Pathogens 2024, 20: e1012514. PMID: 39298535, PMCID: PMC11412506, DOI: 10.1371/journal.ppat.1012514.Peer-Reviewed Original ResearchConceptsRed blood cellsIntraerythrocytic developmentReactive oxygen speciesPlasmodium falciparum blood stagesMultiple organ systemsP. falciparum mitochondrionStatus of hemoglobinBlood stagesPlasmodium falciparumReactive oxygen species productionO2-sensing mechanismIn vitro experimentsPlasmodiumBlood cellsOxygenation statusOrgan systemsFunctional changesParasite growthOxidative stressOxygen tensionMosquito hostCulture systemDeep tissuesOxygen species
2023
Tracking antimalarial drug resistance using mosquito blood meals: a cross-sectional study
Ehrlich H, Somé A, Bazié T, Ebou C, Dembélé E, Balma R, Goodwin J, Wade M, Bei A, Ouédraogo J, Foy B, Dabiré R, Parikh S. Tracking antimalarial drug resistance using mosquito blood meals: a cross-sectional study. The Lancet Microbe 2023, 4: e461-e469. PMID: 37086737, PMCID: PMC10365133, DOI: 10.1016/s2666-5247(23)00063-0.Peer-Reviewed Original ResearchConceptsMosquito blood mealsAntimalarial drug resistanceSurvey 3Blood-fed mosquitoesBlood samplesSurvey 1Survey 2Blood mealDrug resistanceUltrasensitive quantitative PCRHuman blood samplesCross-sectional studyMargin of equivalenceStrong surveillance systemCross-sectional surveySupplementary Materials sectionMarker of clonalityPragmatic thresholdAntimalarial resistanceDrug susceptibilityInfectious diseasesPlasmodium falciparumNational InstituteTolerabilityMaterial section
2014
Analysis of pfhrp2 genetic diversity in Senegal and implications for use of rapid diagnostic tests
Deme AB, Park DJ, Bei AK, Sarr O, Badiane AS, Gueye Pel H, Ahouidi A, Ndir O, Mboup S, Wirth DF, Ndiaye D, Volkman SK. Analysis of pfhrp2 genetic diversity in Senegal and implications for use of rapid diagnostic tests. Malaria Journal 2014, 13: 34. PMID: 24472178, PMCID: PMC3913323, DOI: 10.1186/1475-2875-13-34.Peer-Reviewed Original ResearchConceptsGenetic diversityNucleotide diversityNon-synonymous nucleotide diversityRepeat length polymorphismAmino acid repeatsPfhrp2 geneLength polymorphismExtent of polymorphismEssential genesParasite ecologyAcid repeatsDiversity surveysParasite proteinsBp regionGenesProtein 2Polymorphic genesRepeatsDiversityHistidine-rich protein 2PfHRP2 antigenSenegalese National Malaria Control ProgrammeHRP2 detectionAntigen diversityPlasmodium falciparum
2013
Plasmodium falciparum Merozoite Surface Antigen, PfRH5, Elicits Detectable Levels of Invasion-Inhibiting Antibodies in Humans
Patel SD, Ahouidi AD, Bei AK, Dieye TN, Mboup S, Harrison SC, Duraisingh MT. Plasmodium falciparum Merozoite Surface Antigen, PfRH5, Elicits Detectable Levels of Invasion-Inhibiting Antibodies in Humans. The Journal Of Infectious Diseases 2013, 208: 1679-1687. PMID: 23904294, PMCID: PMC3805239, DOI: 10.1093/infdis/jit385.Peer-Reviewed Original ResearchConceptsMerozoite surface antigenSurface antigenPlasmodium falciparum merozoite surface antigenMulti-subunit vaccineMillions of infectionsIntracellular protozoan parasiteInvasion inhibition assaysSubstantial morbidityClinical isolatesP. falciparumBlood stagesPlasmodium falciparumNatural infectionAntibodiesPfRH5Protozoan parasiteDetectable levelsInhibition assaysInfectionAntigenFalciparumRecombinant formMorbidityLaboratory strainsVaccine
2011
Basigin is a receptor essential for erythrocyte invasion by Plasmodium falciparum
Crosnier C, Bustamante LY, Bartholdson SJ, Bei AK, Theron M, Uchikawa M, Mboup S, Ndir O, Kwiatkowski DP, Duraisingh MT, Rayner JC, Wright GJ. Basigin is a receptor essential for erythrocyte invasion by Plasmodium falciparum. Nature 2011, 480: 534-537. PMID: 22080952, PMCID: PMC3245779, DOI: 10.1038/nature10606.Peer-Reviewed Original ResearchConceptsPlasmodium falciparum merozoitesInvasion of erythrocytesMalaria infectionFalciparum merozoitesAntimalarial therapeuticsP. falciparumBlood stagesPlasmodium falciparumErythrocyte invasionParasite invasionInvasionFalciparumReceptor essentialField strainsBasiginErythrocytesPfRH5VaccineInfectionAntibodies
2010
In Vitro Genetic Analysis of an Erythrocyte Determinant of Malaria Infection
Bei AK, Brugnara C, Duraisingh MT. In Vitro Genetic Analysis of an Erythrocyte Determinant of Malaria Infection. The Journal Of Infectious Diseases 2010, 202: 1722-1727. PMID: 20958212, PMCID: PMC3107553, DOI: 10.1086/657157.Peer-Reviewed Original ResearchConceptsGenetic analysisErythrocyte determinantsSystematic functional analysisDirect genetic analysisErythrocyte biologyInvasion of erythrocytesIsogenic backgroundP. falciparum invasionGene expressionFunctional analysisParasite invasionObligatory stepLentiviral transductionHost receptorsGlycophorin ALife cyclePlasmodium falciparumCulture systemInvasionMalaria infectionUnambiguous identificationTransductionBiologyParasitesErythrocytesA flow cytometry‐based assay for measuring invasion of red blood cells by Plasmodium falciparum
Bei AK, DeSimone TM, Badiane AS, Ahouidi AD, Dieye T, Ndiaye D, Sarr O, Ndir O, Mboup S, Duraisingh MT. A flow cytometry‐based assay for measuring invasion of red blood cells by Plasmodium falciparum. American Journal Of Hematology 2010, 85: 234-237. PMID: 20196166, PMCID: PMC3089760, DOI: 10.1002/ajh.21642.Peer-Reviewed Original ResearchConceptsParasite invasionMalaria parasite Plasmodium falciparumParasite Plasmodium falciparumPlasmodium falciparumFlow cytometry-based assayParasite multiplication rateFlow cytometry-based methodParasite developmentCytometry-based assayCytometry-based methodRed blood cellsDisease severityDye SYBR Green IRing stageVariable invasionMultiplication rateBlood cellsInvasionSYBR Green IHuman erythrocytesFalciparumGreen IImportant determinantErythrocytesParasitemia
2009
Erythrocyte invasion profiles are associated with a common invasion ligand polymorphism in Senegalese isolates of Plasmodium falciparum
LANTOS PM, AHOUIDI AD, BEI AK, JENNINGS CV, SARR O, NDIR O, WIRTH DF, MBOUP S, DURAISINGH MT. Erythrocyte invasion profiles are associated with a common invasion ligand polymorphism in Senegalese isolates of Plasmodium falciparum. Parasitology 2009, 136: 1-9. PMID: 19126266, DOI: 10.1017/s0031182008005167.Peer-Reviewed Original ResearchConceptsErythrocyte receptorSialic acid-independent invasionBlood group O patientsDifferent erythrocyte receptorsGroup O patientsSenegalese isolatesParasite multiplication ratePlasmodium falciparum parasitesMultiple ligand-receptor interactionsO patientsFalciparum parasitesLarge sequence deletionsVariant expression levelParasite isolatesPlasmodium falciparumErythrocyte invasionSelectivity indexReceptorsExpression levelsMajor polymorphismsInvasionInvasion pathwaysPossible determinantsParasitesHuman erythrocytes
2007
Variant merozoite protein expression is associated with erythrocyte invasion phenotypes in Plasmodium falciparum isolates from Tanzania
Bei AK, Membi CD, Rayner JC, Mubi M, Ngasala B, Sultan AA, Premji Z, Duraisingh MT. Variant merozoite protein expression is associated with erythrocyte invasion phenotypes in Plasmodium falciparum isolates from Tanzania. Molecular And Biochemical Parasitology 2007, 153: 66-71. PMID: 17303262, DOI: 10.1016/j.molbiopara.2007.01.007.Peer-Reviewed Original Research
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