Posted at 24 Apr, 12:01h in Research by

Garchitorena, A., Sokolow, S.H., Roche, B., Ngonghala, C.N., Jocque, M., Lund, A., Barry, M., Mordecai, E.A., Daily, G.C., Jones, J.H., Andrews, J.R. (2017). Philosophical Transactions of the Royal Society B, Vol. 372, Issue 1722:20160128.

Abstract:

Reducing the burden of neglected tropical diseases (NTDs) is one of the key strategic targets advanced by the Sustainable Development Goals. Despite the unprecedented effort deployed for NTD elimination in the past decade, their control, mainly through drug administration, remains particularly challenging: persistent poverty and repeated exposure to pathogens embedded in the environment limit the efficacy of strategies focused exclusively on human treatment or medical care. Here, we present a simple modelling framework to illustrate the relative role of ecological and socio-economic drivers of environmentally transmitted parasites and pathogens. Through the analysis of system dynamics, we show that periodic drug treatments that lead to the elimination of directly transmitted diseases may fail to do so in the case of human pathogens with an environmental reservoir. Control of environmentally transmitted diseases can be more effective when human treatment is complemented with interventions targeting the environmental reservoir of the pathogen. We present mechanisms through which the environment can influence the dynamics of poverty via disease feedbacks. For illustration, we present the case studies of Buruli ulcer and schistosomiasis, two devastating waterborne NTDs for which control is particularly challenging.

This article is part of the themed issue “Conservation, biodiversity and infectious disease: scientific evidence and policy implications.”




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    • Molecular Diagnostics

      Pivot has partnered with the Ministry of Public Health and Centre ValBio to develop the first molecular diagnostics laboratory for COVID-19 outside of the capital city.  We additionally have partnered with the Pasteur Institute of Madagascar on novel analysis of dried blood spots from I-HOPE survey for serological analysis of measles, malaria, schistosomiasis, Hep B, and COVID-19.

       

      Learn more: 

      Integrating Health Systems and Science to Respond to COVID-19 in a Model District of Madagascar, Rakotonanahary, R.J.L., et al., 2021, Frontiers in Public Health

      Reconciling model predictions with low reported cases of COVID-19 in Sub-Saharan Africa: Insights from Madagascar, Evans, M.V., et al., 2020, Global Health Action

    • Eco-Epidemiological Surveillance

      We collate environmental surveillance data (e.g. vector surveillance) with biomarkers from household surveys (e.g. rapid tests and antibody tests from dried blood spots of participants in the I-HOPE household survey) to inform the spatio-temporal dynamics of infectious diseases.

       

      Learn more:

      Estimating the local spatio‐temporal distribution of malaria from routine health information systems in areas of low health care access and reporting, Hyde, E, et al., 2021, International Journal of Health Geographics

      Reconciling model predictions with low reported cases of COVID-19 in Sub-Saharan Africa: Insights from Madagascar, Evans, M.V., et al., 2020, Global Health Action

    • GIS (geographical)

      We use a participatory approach to map over 20,000 kilometers of footpaths and 100,000 structures. These data have been combined with high resolution data on land cover, a digital elevation model, rainfall data, and geolocated data from the IHOPE cohort (see above). These data are used to determine travel times to health care, measure geographic equity, and study geospatial determinants of disease. Accessibility modeling results are available on an e-health platform developed with R Shiny.

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      • True baseline
      • True representative sample
      • Sample from inside and outside of the initial catchment population
      • Collection by third party professionals at the National Institute of Statistics who collect identical data nationally
      • Tracks same individuals over time
      • Includes biomarkers such as dried blood spots used for molecular analyses

       

      Learn more: 

      Baseline Population Health Conditions Ahead of a Health System Strengthening Program in Rural Madagascar, Miller, A., et al. 2017, Global Health Action

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      The purpose of Pivot Science is to improve health outcomes over the long-term. Central to this goal is a new capacity building program, which focuses on both increasing research skills among clinicians/implementers, as well as helping researchers better understand and inform clinical priorities. The training includes a series of workshops on understanding clinical priorities, developing research questions, methodology, and dissemination. Trainees include a range of personnel who work within Madagascar’s health sector.

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      Learn more: 

      Integrating Health Systems and Science to Respond to COVID-19 in a Model District of Madagascar, Rakotonanahary, R.J.L., et al., 2021, Frontiers in Public Health

      Reconciling model predictions with low reported cases of COVID-19 in Sub-Saharan Africa: Insights from Madagascar, Evans, M.V., et al., 2020, Global Health Action

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      Learn more:

      Estimating the local spatio‐temporal distribution of malaria from routine health information systems in areas of low health care access and reporting, Hyde, E, et al., 2021, International Journal of Health Geographics

      Reconciling model predictions with low reported cases of COVID-19 in Sub-Saharan Africa: Insights from Madagascar, Evans, M.V., et al., 2020, Global Health Action

      Towards elimination of lymphatic filariasis in southeastern Madagascar: Successes and challenges for interrupting transmission, Garchitorena, A., et al., 2018, PLOS Neglected Tropical Diseases

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      Learn more:

      Evaluation of a novel approach to community health care delivery in Ifanadiana District, Madagascar, Razafinjato, B., et al., 2020, medRxiv

      Rapid response to a measles outbreak in Ifanadiana District, Madagascar, Finnegan, K.E., et al., 2020 medRxiv

      Networks of Care in Rural Madagascar for Achieving Universal Health Coverage in Ifanadiana District, Cordier, L.F., 2020, Health Systems & Reform

      In Madagascar, Use Of Health Care Services Increased When Fees Were Removed: Lessons For Universal Health Coverage, Garchitorena, A., et al., 2017, Health Affairs

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      Learn more:

      Estimating the local spatio‐temporal distribution of malaria from routine health information systems in areas of low health care access and reporting, Hyde, E, et al., 2021, International Journal of Health Geographics

      Improving geographical accessibility modeling for operational use by local health actors, Ihantamalala, F.A, et al., 2020, International Journal of Health Geographics

      Evaluation of a novel approach to community health care delivery in Ifanadiana District, Madagascar, Razafinjato, B., et al., 2020, medRxiv

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      Learn more:

      District-level health system strengthening for universal health coverage: evidence from a longitudinal cohort study in rural Madagascar, 2014-2018, Garchitorena, A., et al. 2020, BMJ Global Health

      Early changes in intervention coverage and mortality rates following the implementation of an integrated health system intervention in Madagascar, Garchitorena, A., et al. 2018, BMJ Global Health

      Assessing trends in the content of maternal and child care following a health system strengthening initiative in rural Madagascar: A longitudinal cohort study, Ezran, C., et al. 2019, PLOS Medicine

      Baseline Population Health Conditions Ahead of a Health System Strengthening Program in Rural Madagascar, Miller, A., et al. 2017, Global Health Action

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