2022
Neighbourhood prevalence-to-notification ratios for adult bacteriologically-confirmed tuberculosis reveals hotspots of underdiagnosis in Blantyre, Malawi
Khundi M, Carpenter JR, Corbett EL, Feasey HRA, Soko RN, Nliwasa M, Twabi H, Chiume L, Burke RM, Horton KC, Dodd PJ, Cohen T, MacPherson P. Neighbourhood prevalence-to-notification ratios for adult bacteriologically-confirmed tuberculosis reveals hotspots of underdiagnosis in Blantyre, Malawi. PLOS ONE 2022, 17: e0268749. PMID: 35605004, PMCID: PMC9126376, DOI: 10.1371/journal.pone.0268749.Peer-Reviewed Original ResearchConceptsCase notification ratesPrevalence surveyNotification ratioNeighbourhood prevalenceTB case notification ratesXpert MTB/RIFCase-finding interventionsTrue disease burdenChest X-ray screeningTB prevalence surveyTB surveillance systemMTB/RIFDiagnosis of tuberculosisSputum smear microscopyTB clinicTB patientsRespiratory infectionsTB prevalenceDisease burdenNotification ratesSmear microscopyX-ray screeningTuberculosisPrevalenceUrban tuberculosis
2021
Evolution and emergence of multidrug-resistant Mycobacterium tuberculosis in Chisinau, Moldova
Brown TS, Eldholm V, Brynildsrud O, Osnes M, Levy N, Stimson J, Colijn C, Alexandru S, Noroc E, Ciobanu N, Crudu V, Cohen T, Mathema B. Evolution and emergence of multidrug-resistant Mycobacterium tuberculosis in Chisinau, Moldova. Microbial Genomics 2021, 7: 000620. PMID: 34431762, PMCID: PMC8549355, DOI: 10.1099/mgen.0.000620.Peer-Reviewed Original ResearchConceptsDrug-resistant TB casesMultidrug-resistant Mycobacterium tuberculosisDrug-resistant tuberculosisDrug resistance mutationsPopulation size expansionPublic health practiceSoviet UnionSocial turmoilTB patientsTB casesTB controlRepublic of MoldovaInpatient hospitalizationMigration historyInpatient treatmentEastern EuropeNational guidelinesEpidemiological historyResistance mutationsHealth practicesGenomic surveillance effortsCapital cityMycobacterium tuberculosisTuberculosisMoldova
2019
Disparities in access to diagnosis and care in Blantyre, Malawi, identified through enhanced tuberculosis surveillance and spatial analysis
MacPherson P, Khundi M, Nliwasa M, Choko AT, Phiri VK, Webb EL, Dodd PJ, Cohen T, Harris R, Corbett EL. Disparities in access to diagnosis and care in Blantyre, Malawi, identified through enhanced tuberculosis surveillance and spatial analysis. BMC Medicine 2019, 17: 21. PMID: 30691470, PMCID: PMC6350280, DOI: 10.1186/s12916-019-1260-6.Peer-Reviewed Original ResearchConceptsTB case notification ratesCase notification ratesCommunity health workersNotification ratesTB casesLow case detectionSingle sputum sampleInverse care lawArea-level factorsTB registrationTB clinicTB patientsClinical characteristicsTB diagnosisTuberculosis casesResultsIn totalTB surveillanceCase detectionModifiable predictorsSputum samplesHealth workersTB officersTB microscopyAdjusted modelTuberculosis surveillance
2017
Polyclonal Pulmonary Tuberculosis Infections and Risk for Multidrug Resistance, Lima, Peru - Volume 23, Number 11—November 2017 - Emerging Infectious Diseases journal - CDC
Nathavitharana RR, Shi CX, Chindelevitch L, Calderon R, Zhang Z, Galea JT, Contreras C, Yataco R, Lecca L, Becerra MC, Murray MB, Cohen T. Polyclonal Pulmonary Tuberculosis Infections and Risk for Multidrug Resistance, Lima, Peru - Volume 23, Number 11—November 2017 - Emerging Infectious Diseases journal - CDC. Emerging Infectious Diseases 2017, 23: 1887-1890. PMID: 29048297, PMCID: PMC5652442, DOI: 10.3201/eid2311.170077.Peer-Reviewed Original ResearchConceptsTreatment of tuberculosisHost Mycobacterium tuberculosis diversityMultidrug-resistant TBInfectious Diseases journal - CDCPulmonary TB patientsPulmonary tuberculosis infectionTB patientsTuberculosis infectionPolyclonal infectionsSimple infectionMultidrug resistanceInfectionPatientsTuberculosisPrevalenceDiagnosis
2016
Tradeoffs in Introduction Policies for the Anti-Tuberculosis Drug Bedaquiline: A Model-Based Analysis
Kunkel A, Cobelens FG, Cohen T. Tradeoffs in Introduction Policies for the Anti-Tuberculosis Drug Bedaquiline: A Model-Based Analysis. PLOS Medicine 2016, 13: e1002142. PMID: 27727274, PMCID: PMC5058480, DOI: 10.1371/journal.pmed.1002142.Peer-Reviewed Original ResearchConceptsTreatment of tuberculosisMDR-TB treatmentTB treatmentSecondary casesDrug-resistant (XDR) TBResistance patternsLife expectancyMultidrug-resistant TB patientsDrug bedaquilineMDR-TB drugsAnti-tuberculosis drug bedaquilineCulture conversionMDR patientsTB patientsMortality benefitBedaquiline resistanceMedian timeRisk of resistanceTB drugsDecrease transmissionHypothetical cohortSources of heterogeneityDrug interactionsInitial cohortTime of initiationUse of Lot Quality Assurance Sampling to Ascertain Levels of Drug Resistant Tuberculosis in Western Kenya
Jezmir J, Cohen T, Zignol M, Nyakan E, Hedt-Gauthier BL, Gardner A, Kamle L, Injera W, Carter EJ. Use of Lot Quality Assurance Sampling to Ascertain Levels of Drug Resistant Tuberculosis in Western Kenya. PLOS ONE 2016, 11: e0154142. PMID: 27167381, PMCID: PMC4864281, DOI: 10.1371/journal.pone.0154142.Peer-Reviewed Original ResearchConceptsMDR-TBDrug resistanceResistant tuberculosisLot Quality Assurance Sampling methodologyMulti-drug resistant tuberculosisPositive TB patientsDrug resistance surveillanceDrug-resistant tuberculosisTB drug resistanceRural settingsPoly-resistant strainsTB patientsWestern KenyaLot Quality AssuranceLow prevalencePatientsResistance surveillancePrevalenceTuberculosisLQASSettingLow levelsDifferent geographic settingsUrban settingsLevels
2014
Cigarette smoking among tuberculosis patients increases risk of transmission to child contacts
Huang CC, Tchetgen ET, Becerra MC, Cohen T, Galea J, Calderon R, Yataco R, Contreras C, Zhang ZB, Lecca L, Murray M. Cigarette smoking among tuberculosis patients increases risk of transmission to child contacts. The International Journal Of Tuberculosis And Lung Disease 2014, 18: 1285-1291. PMID: 25299859, DOI: 10.5588/ijtld.14.0309.Peer-Reviewed Original ResearchConceptsLatent tuberculous infectionTuberculin skin testTB patientsIndex caseChild household contactsDrug-susceptible TBIndex TB patientsObservational cohort studySecondhand smoke exposureRisk of transmissionPoisson regression modelsHousehold contactsCohort studyTST positivityTuberculosis patientsTuberculous infectionSmoke exposureSmoking statusTuberculosis casesCigarette smokingSkin testRisk factorsPatientsInfection statusTime pointsProspective evaluation of a complex public health intervention: lessons from an initial and follow-up cross-sectional survey of the tuberculosis strain typing service in England
Mears J, Abubakar I, Crisp D, Maguire H, Innes JA, Lilley M, Lord J, Cohen T, Borgdorff MW, Vynnycky E, McHugh TD, Sonnenberg P. Prospective evaluation of a complex public health intervention: lessons from an initial and follow-up cross-sectional survey of the tuberculosis strain typing service in England. BMC Public Health 2014, 14: 1023. PMID: 25273511, PMCID: PMC4194411, DOI: 10.1186/1471-2458-14-1023.Peer-Reviewed Original ResearchMeSH KeywordsAttitude of Health PersonnelBacterial Typing TechniquesClinical CompetenceCost-Benefit AnalysisCross-Sectional StudiesEnglandFemaleFollow-Up StudiesHealth ServicesHumansMaleMolecular EpidemiologyMycobacteriumPopulation SurveillanceProgram EvaluationProspective StudiesPublic HealthSurveys and QuestionnairesTuberculosisConceptsPublic health interventionsComplex public health interventionsCross-sectional surveyHealth interventionsNational public health interventionsStrain typingPublic health staffRepeated cross-sectional surveySignificant increaseMIRU-VNTR typingProportion of respondentsTB patientsSelf-rated knowledgeTB controlProspective evaluationMixed-method evaluationHealth staffProspective identificationMajority of respondentsService users' perceptionsMethodsAn onlineInterventionTypingFuture evaluationProfessional groups
2012
Modeling the Dynamic Relationship Between HIV and the Risk of Drug-Resistant Tuberculosis
Sergeev R, Colijn C, Murray M, Cohen T. Modeling the Dynamic Relationship Between HIV and the Risk of Drug-Resistant Tuberculosis. Science Translational Medicine 2012, 4: 135ra67. PMID: 22623743, PMCID: PMC3387814, DOI: 10.1126/scitranslmed.3003815.Peer-Reviewed Original ResearchConceptsMultidrug-resistant TBDrug-resistant tuberculosisDrug-resistant TBHIV-seropositive individualsHIV statusTB patientsLatent Mycobacterium tuberculosis infectionIndividual HIV statusIncident HIV infectionMultidrug-resistant tuberculosisMycobacterium tuberculosis infectionEffects of HIVCross-sectional studyDrug-resistant formsRise of HIVIndividual-level associationsAcquisition of resistanceAverage CD4HIV infectionResistance-conferring mutationsTB controlTuberculosis infectionResistant tuberculosisTB drugsHIV epidemicOutcomes among tuberculosis patients with isoniazid resistance in Georgia, 2007-2009.
Gegia M, Cohen T, Kalandadze I, Vashakidze L, Furin J. Outcomes among tuberculosis patients with isoniazid resistance in Georgia, 2007-2009. The International Journal Of Tuberculosis And Lung Disease 2012, 16: 812-6. PMID: 22507372, PMCID: PMC3786434, DOI: 10.5588/ijtld.11.0637.Peer-Reviewed Original ResearchMeSH KeywordsAdultAntitubercular AgentsChi-Square DistributionDrug Resistance, BacterialDrug Therapy, CombinationEthambutolFemaleGeorgia (Republic)HumansIsoniazidLogistic ModelsMaleMicrobial Sensitivity TestsMiddle AgedMultivariate AnalysisMycobacterium tuberculosisPredictive Value of TestsPyrazinamideRetrospective StudiesRifampinRisk AssessmentRisk FactorsSputumTime FactorsTreatment OutcomeTuberculosisConceptsPulmonary tuberculosisPrevious treatmentOutcomes of patientsPulmonary TB patientsSubset of patientsRetrospective record reviewForms of tuberculosisFirst-line drugsHigh TB ratesDrug-resistant formsLower ratesLow tuberculosisTB patientsTuberculosis patientsOptimal management strategyTreatment regimenRecord reviewTB ratesTreatment successTreatment outcomesCountry of GeorgiaPatientsIsoniazid resistanceTuberculosisDrug resistance
2011
Multiple Introductions of Multidrug-Resistant Tuberculosis into Households, Lima, Peru - Volume 17, Number 6—June 2011 - Emerging Infectious Diseases journal - CDC
Cohen T, Murray M, Abubakar I, Zhang Z, Sloutsky A, Arteaga F, Chalco K, Franke MF, Becerra MC. Multiple Introductions of Multidrug-Resistant Tuberculosis into Households, Lima, Peru - Volume 17, Number 6—June 2011 - Emerging Infectious Diseases journal - CDC. Emerging Infectious Diseases 2011, 17: 969-975. PMID: 21749756, PMCID: PMC3358204, DOI: 10.3201/eid1706.101471.Peer-Reviewed Original ResearchConceptsMDR-TB patientsMDR-TBMultidrug-resistant tuberculosisTB patientsOptimal treatment regimensMDR Mycobacterium tuberculosisDrug sensitivity testingHigh incidence areaRepetitive unit-variable number tandem repeatHousehold contactsTreatment regimensHousehold transmissionSecondary casesPatientsMycobacterium tuberculosisSensitivity testingCommunity exposureTuberculosisNumber tandem repeatTBSecond strainExposureRegimensSpoligotyping