2024
Persistent and multiclonal malaria parasite dynamics despite extended artemether-lumefantrine treatment in children
Goodwin J, Kajubi R, Wang K, Li F, Wade M, Orukan F, Huang L, Whalen M, Aweeka F, Mwebaza N, Parikh S. Persistent and multiclonal malaria parasite dynamics despite extended artemether-lumefantrine treatment in children. Nature Communications 2024, 15: 3817. PMID: 38714692, PMCID: PMC11076639, DOI: 10.1038/s41467-024-48210-7.Peer-Reviewed Original ResearchConceptsDay 7 lumefantrine concentrationsArtemether-lumefantrine treatmentRing-stage parasitesEarly post-treatmentEarly post-treatment periodArtemether-lumefantrineArtemisinin resistanceDay regimenMulticlonal infectionsEfficacious therapyFollow-upRandomized trialsPersistent clonesTransmission settingsEffective treatmentPost-treatment periodRegimensAntimalarial studiesStandard diagnosticsStandard 3DaysPost-treatmentChildrenTreatmentTherapy
2022
Moving towards malaria elimination with safer treatment for children with G6PD deficiency
Boum Y, Moukoko C, Parikh S. Moving towards malaria elimination with safer treatment for children with G6PD deficiency. The Lancet Infectious Diseases 2022, 23: 388-390. PMID: 36462525, DOI: 10.1016/s1473-3099(22)00724-1.Peer-Reviewed Original ResearchImpact of Drug Exposure on Resistance Selection Following Artemether‐Lumefantrine Treatment for Malaria in Children With and Without HIV in Uganda
Kay K, Goodwin J, Ehrlich H, Ou J, Freeman T, Wang K, Li F, Wade M, French J, Huang L, Aweeka F, Mwebaza N, Kajubi R, Riggs M, Ruiz‐Garcia A, Parikh S. Impact of Drug Exposure on Resistance Selection Following Artemether‐Lumefantrine Treatment for Malaria in Children With and Without HIV in Uganda. Clinical Pharmacology & Therapeutics 2022, 113: 660-669. PMID: 36260349, PMCID: PMC9981240, DOI: 10.1002/cpt.2768.Peer-Reviewed Original ResearchConceptsLopinavir-ritonavirLumefantrine concentrationsSensitive parasitesRecurrence riskPopulation PK/PD modelArtemether-lumefantrine treatmentTrimethoprim-sulfamethoxazole prophylaxisPK/PD modelPopulation PK modelFirst-order absorptionHigh transmission regionsAntiretroviral regimensLumefantrine exposureLumefantrine susceptibilityPfcrt K76Pfmdr1 N86Suboptimal dosingArtemether-lumefantrineTwo-compartment modelHIV statusRecurrent infectionsCombination therapyDrug exposurePrimary treatmentArtemisinin resistanceClinical characteristics of Plasmodium falciparum infection among symptomatic patients presenting to a major urban military hospital in Cameroon
Hodson DZ, Mbarga Etoundi Y, Mbatou Nghokeng N, Mohamadou Poulibe R, Magne Djoko S, Goodwin J, Cheteug Nguesta G, Nganso T, Armstrong JN, Andrews JJ, Zhang E, Wade M, Eboumbou Moukoko CE, Boum Y, Parikh S. Clinical characteristics of Plasmodium falciparum infection among symptomatic patients presenting to a major urban military hospital in Cameroon. Malaria Journal 2022, 21: 298. PMID: 36273147, PMCID: PMC9588226, DOI: 10.1186/s12936-022-04315-2.Peer-Reviewed Original ResearchConceptsP. falciparum infectionPopulation attributable risk percentFalciparum infectionPlasmodium falciparum infectionYears of ageClinical characteristicsUrban hospitalMilitary HospitalAttributable risk percentHigher positivity rateLikelihood ratioRapid diagnostic testsMajor urban hospitalRural African settingConclusionsThe prevalenceHigh feverSymptomatic patientsHemoglobin levelsAnemia prevalenceSevere anemiaEmergency departmentVenous samplesClinical surveyPositivity rateWHO definitionThe Impact of Extended Treatment With Artemether-lumefantrine on Antimalarial Exposure and Reinfection Risks in Ugandan Children With Uncomplicated Malaria: A Randomized Controlled Trial
Whalen ME, Kajubi R, Goodwin J, Orukan F, Colt M, Huang L, Richards K, Wang K, Li F, Mwebaza N, Aweeka FT, Parikh S. The Impact of Extended Treatment With Artemether-lumefantrine on Antimalarial Exposure and Reinfection Risks in Ugandan Children With Uncomplicated Malaria: A Randomized Controlled Trial. Clinical Infectious Diseases 2022, 76: 443-452. PMID: 36130191, PMCID: PMC9907485, DOI: 10.1093/cid/ciac783.Peer-Reviewed Original ResearchConceptsArtemether-lumefantrineReinfection riskArtemisinin-based combination therapyDay 7 levelsOverall drug exposureHigh transmission settingsYoung childrenAntimalarial exposureUncomplicated malariaExtended regimenRecurrent parasitemiaControlled TrialsPrimary outcomeCombination therapyKaplan-MeierDrug exposureTotal episodesUgandan childrenArtemisinin resistanceLumefantrine concentrationsPharmacodynamic studiesHigh riskPharmacokinetic parametersRecurrence riskDay 7
2020
Quantification of glucose-6-phosphate dehydrogenase activity by spectrophotometry: A systematic review and meta-analysis
Pfeffer DA, Ley B, Howes RE, Adu P, Alam MS, Bansil P, Boum Y, Brito M, Charoenkwan P, Clements A, Cui L, Deng Z, Egesie OJ, Espino FE, von Fricken ME, Hamid MMA, He Y, Henriques G, Khan WA, Khim N, Kim S, Lacerda M, Lon C, Mekuria AH, Menard D, Monteiro W, Nosten F, Oo NN, Pal S, Palasuwan D, Parikh S, Pasaribu A, Poespoprodjo JR, Price DJ, Roca-Feltrer A, Roh ME, Saunders DL, Spring MD, Sutanto I, Ley-Thriemer K, Weppelmann TA, von Seidlein L, Satyagraha AW, Bancone G, Domingo GJ, Price RN. Quantification of glucose-6-phosphate dehydrogenase activity by spectrophotometry: A systematic review and meta-analysis. PLOS Medicine 2020, 17: e1003084. PMID: 32407380, PMCID: PMC7224463, DOI: 10.1371/journal.pmed.1003084.Peer-Reviewed Original ResearchConceptsG6PD activity measurementsG6PD activityDiagnostic Accuracy Studies-2 toolDormant liver stagesRisk of biasGlucose-6-phosphate dehydrogenase deficiencyStudy-level heterogeneityNormal control samplesReference diagnostic methodInter-study variabilityGlucose-6-phosphate dehydrogenase activityMalaria patientsHaematological conditionsLiver stagesRadical cureP. ovalePlasmodium vivaxPubMed searchIntermediate deficiencySystematic reviewDiagnostic thresholdMale medianStudy participantsMedian activityDiagnostic implications
2019
Efficacy and risk of harms of repeat ivermectin mass drug administrations for control of malaria (RIMDAMAL): a cluster-randomised trial
Foy BD, Alout H, Seaman JA, Rao S, Magalhaes T, Wade M, Parikh S, Soma DD, Sagna AB, Fournet F, Slater HC, Bougma R, Drabo F, Diabaté A, Coulidiaty AGV, Rouamba N, Dabiré RK. Efficacy and risk of harms of repeat ivermectin mass drug administrations for control of malaria (RIMDAMAL): a cluster-randomised trial. The Lancet 2019, 393: 1517-1526. PMID: 30878222, PMCID: PMC6459982, DOI: 10.1016/s0140-6736(18)32321-3.Peer-Reviewed Original ResearchConceptsMass drug administrationCluster-randomised trialIntervention groupMalaria episodesControl groupDrug AdministrationDetection cohortMass administrationIvermectin mass drug administrationUncomplicated malaria episodesClinical malaria episodesMalaria transmission seasonSingle oral dosesControl of malariaAdverse eventsCumulative incidencePrimary outcomeOral dosesEligible participantsAdverse reactionsFurther dosesTwo-armExclusion criteriaTransmission seasonTreatment phase
2016
Malaria in HIV-Infected Children Receiving HIV Protease-Inhibitor- Compared with Non-Nucleoside Reverse Transcriptase Inhibitor-Based Antiretroviral Therapy, IMPAACT P1068s, Substudy to P1060
Hobbs CV, Gabriel EE, Kamthunzi P, Tegha G, Tauzie J, Petzold E, Barlow-Mosha L, H. BH, Li Y, Ilmet T, Kirmse B, Neal J, Parikh S, Deygoo N, Philippe P, Mofenson L, Prescott W, Chen J, Musoke P, Palumbo P, Duffy PE, Borkowsky W, Team F. Malaria in HIV-Infected Children Receiving HIV Protease-Inhibitor- Compared with Non-Nucleoside Reverse Transcriptase Inhibitor-Based Antiretroviral Therapy, IMPAACT P1068s, Substudy to P1060. PLOS ONE 2016, 11: e0165140. PMID: 27936233, PMCID: PMC5147802, DOI: 10.1371/journal.pone.0165140.Peer-Reviewed Original ResearchMeSH KeywordsAntimalarialsCD4 Lymphocyte CountChildChild, PreschoolCoinfectionDrug Therapy, CombinationFemaleHIV InfectionsHIV Protease InhibitorsHIV-1HumansInfantLamivudineLopinavirMalaria, FalciparumMalawiMaleNevirapinePlasmodium falciparumReverse Transcriptase InhibitorsRitonavirViral LoadZidovudineConceptsNon-nucleoside reverse transcriptase inhibitorAntiretroviral therapyReverse transcriptase inhibitorBlood smear microscopyHIV protease inhibitorsPositive BSTranscriptase inhibitorProtease inhibitorsClinical malaria incidenceMalaria parasite carriageMalaria-endemic settingsHIV antiretroviral therapyAnti-malarial treatmentLopinavir-ritonavirIllness visitsParasite carriageMalaria treatmentClinical studiesSmear microscopyLower riskMalaria incidenceFurther evaluationMalaria parasitesHIVMonthsAntiretroviral Choice for HIV Impacts Antimalarial Exposure and Treatment Outcomes in Ugandan Children
Parikh S, Kajubi R, Huang L, Ssebuliba J, Kiconco S, Gao Q, Li F, Were M, Kakuru A, Achan J, Mwebaza N, Aweeka FT. Antiretroviral Choice for HIV Impacts Antimalarial Exposure and Treatment Outcomes in Ugandan Children. Clinical Infectious Diseases 2016, 63: 414-422. PMID: 27143666, PMCID: PMC4946019, DOI: 10.1093/cid/ciw291.Peer-Reviewed Original ResearchConceptsArtemether-lumefantrine treatmentLPV/rRecurrent malariaLumefantrine exposureDrug exposureCritical drug-drug interactionsFirst-line antiretroviral therapy regimensArtemisinin-based combination therapyLopinavir/ritonavirAntiretroviral therapy regimensPlasmodium falciparum malariaHuman immunodeficiency virusDay 7 concentrationsMalaria-endemic regionsDrug-drug interactionsAntimalarial exposureAntimalarial componentPharmacokinetic samplingArtemether-lumefantrineFalciparum malariaClinical outcomesDosing regimensTherapy regimensImmunodeficiency virusCombination therapy
2015
The epidemiological impact of HIV antiretroviral therapy on malaria in children
Greenhalgh S, Ndeffo M, Galvani AP, Parikh S. The epidemiological impact of HIV antiretroviral therapy on malaria in children. AIDS 2015, 29: 473-482. PMID: 25486414, PMCID: PMC4391884, DOI: 10.1097/qad.0000000000000550.Peer-Reviewed Original ResearchConceptsHIV protease inhibitorsRecurrent malariaMalaria transmissionAntiretroviral therapyArtemether-lumefantrineAnnual incidenceProtease inhibitorsFirst-line antiretroviral regimenFirst-line antiretroviral therapyArtemether-lumefantrine treatmentHIV-negative childrenFirst-line antimalarialsHIV prevalence settingsHIV antiretroviral therapyRecent clinical trialsHIV prevalence levelsMalaria transmission settingsMalaria transmission intensityAntiretroviral regimenAntimalarial treatmentHIV prevalenceProphylactic effectPrevalence settingsClinical trialsHealth burden
2012
Population Pharmacokinetics and Pharmacodynamics of Piperaquine in Children With Uncomplicated Falciparum Malaria
Tarning J, Zongo I, Somé FA, Rouamba N, Parikh S, Rosenthal PJ, Hanpithakpong W, Jongrak N, Day NP, White NJ, Nosten F, Ouedraogo J, Lindegardh N. Population Pharmacokinetics and Pharmacodynamics of Piperaquine in Children With Uncomplicated Falciparum Malaria. Clinical Pharmacology & Therapeutics 2012, 91: 497-505. PMID: 22258469, PMCID: PMC3736305, DOI: 10.1038/clpt.2011.254.Peer-Reviewed Original ResearchConceptsUncomplicated falciparum malariaFalciparum malariaPopulation pharmacokineticsThree-compartment distribution modelNonlinear mixed-effects modelingRecurrent malaria infectionsTotal piperaquine exposureArtemisinin combination treatmentWeight-normalized dosePlasma concentration-time profilesYoung childrenMixed-effects modelingConcentration-time profilesPiperaquine concentrationsPiperaquine exposureDose regimenMalaria infectionPlasma concentrationsPharmacodynamic propertiesCombination treatmentBody weightPiperaquineSignificant covariatesOlder childrenMalaria
2009
Pharmacokinetics of Artemether-Lumefantrine and Artesunate-Amodiaquine in Children in Kampala, Uganda
Mwesigwa J, Parikh S, McGee B, German P, Drysdale T, Kalyango JN, Clark TD, Dorsey G, Lindegardh N, Annerberg A, Rosenthal PJ, Kamya MR, Aweeka F. Pharmacokinetics of Artemether-Lumefantrine and Artesunate-Amodiaquine in Children in Kampala, Uganda. Antimicrobial Agents And Chemotherapy 2009, 54: 52-59. PMID: 19841149, PMCID: PMC2798532, DOI: 10.1128/aac.00679-09.Peer-Reviewed Original ResearchConceptsArtemisinin-based combination therapyUncomplicated malariaActive metaboliteConcentration-time curveWorld Health OrganizationACT regimensArtesunate-AmodiaquineLast doseArtemether-lumefantrineLevel of exposureDrug regimensVenous samplingCombination therapyUgandan childrenPK parametersPharmacokinetic dataArtemisinin derivativesPK resultsOptimum dosingRegimensLumefantrineHealth OrganizationAdultsChildrenDesethylamodiaquineImpact of the Method of G6PD Deficiency Assessment on Genetic Association Studies of Malaria Susceptibility
Johnson MK, Clark TD, Njama-Meya D, Rosenthal PJ, Parikh S. Impact of the Method of G6PD Deficiency Assessment on Genetic Association Studies of Malaria Susceptibility. PLOS ONE 2009, 4: e7246. PMID: 19789650, PMCID: PMC2748715, DOI: 10.1371/journal.pone.0007246.Peer-Reviewed Original Research