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Harding-Esch EM, Burgert-Brucker CR, Jimenez C, Bakhtiari A, Willis R, Dejene Bejiga M, Mpyet C, Ngondi J, Boyd S, Abdala M, Abdou A, Adamu Y, Alemayehu A, Alemayehu W, Al-Khatib T, Apadinuwe SC, Awaca N, Awoussi MS, Baayendag G, Badiane Mouctar D, Bailey RL, Batcho W, Bay Z, Bella A, Beido N, Bol YY, Bougouma C, Brady CJ, Bucumi V, Butcher R, Cakacaka R, Cama A, Camara M, Cassama E, Chaora SG, Chebbi AC, Chisambi AB, Chu B, Conteh A, Coulibaly SM, Courtright P, Dalmar A, Dat TM, Davids T, DJAKER MEA, de Fátima Costa Lopes M, Dézoumbé D, Dodson S, Downs P, Eckman S, Elshafie BE, Elmezoghi M, Elvis AA, Emerson P, Epée EEE, Faktaufon D, Fall M, Fassinou A, Fleming F, Flueckiger R, Gamael KK, Garae M, Garap J, Gass K, Gebru G, Gichangi MM, Giorgi E, Goépogui A, Gómez DVF, Gómez Forero DP, Gower EW, Harte A, Henry R, Honorio-Morales HA, Ilako DR, Issifou AAB, Jones E, Kabona G, Kabore M, Kadri B, Kalua K, Kanyi SK, Kebede S, Kebede F, Keenan JD, Kello AB, Khan AA, KHELIFI H, Kilangalanga J, KIM SH, Ko R, Lewallen S, Lietman T, Logora MSY, Lopez YA, MacArthur C, Macleod C, Makangila F, Mariko B, Martin DL, Masika M, Massae P, Massangaie M, Matendechero HS, Mathewos T, McCullagh S, Meite A, Mendes EP, Abdi HM, Miller H, Minnih A, Mishra SK, Molefi T, Mosher A, M’Po N, Mugume F, Mukwiza R, Mwale C, Mwatha S, Mwingira U, Nash SD, NASSA C, Negussu N, Nieba C, Noah Noah JC, Nwosu CO, Olobio N, Opon R, Pavluck A, Phiri I, Rainima-Qaniuci M, Renneker KK, Saboyá-Díaz MI, Sakho F, Sanha S, Sarah V, Sarr B, Szwarcwald CL, Shah Salam A, Sharma S, Seife F, Serrano Chavez GM, Sissoko M, Sitoe HM, Sokana O, Tadesse F, Taleo F, Talero SL, Tarfani Y, Tefera A, Tekeraoi R, Tesfazion A, Traina A, Traoré L, Trujillo-Trujillo J, Tukahebwa EM, Vashist P, Wanyama EB, WARUSAVITHANA SD, Watitu TK, West S, Win Y, Woods G, YAJIMA A, Yaya G, Zecarias A, Zewengiel S, Zoumanigui A, Hooper PJ, Millar T, Rotondo L, Solomon AW. Tropical Data: Approach and Methodology as Applied to Trachoma Prevalence Surveys. Ophthalmic Epidemiol 2023; 30:544-560. [PMID: 38085791 PMCID: PMC10751062 DOI: 10.1080/09286586.2023.2249546] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 08/11/2023] [Indexed: 12/18/2023]
Abstract
PURPOSE Population-based prevalence surveys are essential for decision-making on interventions to achieve trachoma elimination as a public health problem. This paper outlines the methodologies of Tropical Data, which supports work to undertake those surveys. METHODS Tropical Data is a consortium of partners that supports health ministries worldwide to conduct globally standardised prevalence surveys that conform to World Health Organization recommendations. Founding principles are health ministry ownership, partnership and collaboration, and quality assurance and quality control at every step of the survey process. Support covers survey planning, survey design, training, electronic data collection and fieldwork, and data management, analysis and dissemination. Methods are adapted to meet local context and needs. Customisations, operational research and integration of other diseases into routine trachoma surveys have also been supported. RESULTS Between 29th February 2016 and 24th April 2023, 3373 trachoma surveys across 50 countries have been supported, resulting in 10,818,502 people being examined for trachoma. CONCLUSION This health ministry-led, standardised approach, with support from the start to the end of the survey process, has helped all trachoma elimination stakeholders to know where interventions are needed, where interventions can be stopped, and when elimination as a public health problem has been achieved. Flexibility to meet specific country contexts, adaptation to changes in global guidance and adjustments in response to user feedback have facilitated innovation in evidence-based methodologies, and supported health ministries to strive for global disease control targets.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Amza Abdou
- Programme National de Santé Oculaire, Niger
| | | | | | | | | | | | - Naomie Awaca
- Ministère de la Santé Publique, Democratic Republic of Congo
| | | | | | | | | | | | | | | | | | | | - Clarisse Bougouma
- Programme national de lutte contre les maladies tropicales négligées (PNMTN), Burkina Faso
| | | | - Victor Bucumi
- National Integrated Programme for the Control of Neglected Tropical Diseases and Blindness (PNIMTNC), Burundi
| | | | | | | | | | | | | | | | | | - Brian Chu
- International Trachoma Initiative, USA
| | | | | | - Paul Courtright
- Division of Ophthalmology, University of Cape Town, Cape Town, South Africa, South Africa
| | - Abdi Dalmar
- Ministry of Human Development and Public Services, Somalia
| | | | | | | | | | | | | | | | | | | | | | - Ange Aba Elvis
- Programme National de la Santé Oculaire et de la lutte contre l’Onchocercose, Côte d’Ivoire
| | | | | | | | | | | | | | | | | | | | - Jambi Garap
- Port Moresby General Hospital, Papua New Guinea
| | | | | | | | | | | | | | | | | | - Anna Harte
- London School of Hygiene & Tropical Medicine, UK
| | - Rob Henry
- U.S. Agency for International Development, USA
| | | | | | | | | | | | - Martin Kabore
- Programme national de lutte contre les maladies tropicales négligées (PNMTN), Burkina Faso
| | | | - Khumbo Kalua
- Blantyre Institute for Community Outreach, Malawi
| | | | | | | | | | | | | | | | | | | | - Robert Ko
- Port Moresby General Hospital, Papua New Guinea
| | - Susan Lewallen
- Division of Ophthalmology, University of Cape Town, Cape Town, South Africa, South Africa
| | | | | | - Yuri A Lopez
- SACAICET / MINISTERIO DEL PODER POPULAR PARA LA SALUD, Venezuela
| | | | | | | | | | | | | | | | | | | | | | | | - Aboulaye Meite
- Ministère de la Santé et de l’Hygiène Publique, Cote d’Ivoire
| | | | | | | | | | | | | | - Aryc Mosher
- U.S. Agency for International Development, USA
| | | | | | | | | | | | | | | | | | | | - Cece Nieba
- Ministère de la Santé et de l’Hygiene Publique, Guinea
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Oliver Sokana
- Solomon Islands Ministry of Health and Medical Services, Solomon Islands
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Issifou AAB, Dare A, Badou GA, Harding-Esch EM, Solomon AW, Bakhtiari A, Boyd S, Jimenez C, Harte A, Burgert-Brucker CR, Sintondji FR, Dossa NI, M'Po NTN, Batcho W. Twenty-Three Population-Based Trachoma Prevalence Surveys in the Central and Northern Regions of Benin, 2018-2022. Ophthalmic Epidemiol 2023:1-11. [PMID: 38032921 DOI: 10.1080/09286586.2023.2265796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 03/14/2023] [Indexed: 12/02/2023]
Abstract
PURPOSE Trachoma is an infectious eye disease caused by Chlamydia trachomatis. Infection causes conjunctival inflammation, which can be manifested by the sign known as trachomatous inflammation-follicular (TF). Repeated inflammation leads to eyelid scarring, which in susceptible individuals can cause in-turning of the eyelashes, referred to as trachomatous trichiasis (TT). This article describes 23 population-based surveys conducted in northern and central Benin to determine TF and/or TT prevalence for trachoma elimination purposes. METHODS A total of 18 surveys estimated the prevalence of both TF and TT: two baseline surveys, eight impact surveys after implementation of interventions against trachoma, and eight surveillance surveys. Five other evaluation units (EUs) were surveyed for TT only. To estimate the TF prevalence, a target sample size of 1701 (baseline) and 1164 1-9-year-olds (impact and surveillance) was required, whereas 2818 ≥ 15-year-olds were required to estimate the less prevalent TT. In each EU, individuals were selected by two-stage cluster sampling and examined by certified graders for TF and/or TT. RESULTS A total of 68,613 people were examined. TF prevalence estimates were under the 5% elimination threshold in all surveys. TT prevalence estimates were above the 0.2% elimination threshold in all five TT-only surveys and in four impact surveys, ranging from 0.2-0.57. CONCLUSION TF prevalence in Benin is low, but TT was above 0.2% in nine districts. Increased case-finding and continuing efforts to improve surgery accessibility will be needed to reduce the burden of TT in Benin.
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Affiliation(s)
| | - Aboudou Dare
- Programme National de Lutte contre les Maladies Transmissibles, Ministère De La Santé, Cotonou, Benin
| | | | - Emma M Harding-Esch
- Clinical Research Department, London School of Hygiene & Tropical Medicine, London, UK
| | - Anthony W Solomon
- Global Neglected Tropical Diseases Programme, World Health Organization, Geneva, Switzerland
| | - Ana Bakhtiari
- International Trachoma Initiative, Task Force for Global Health, Atlanta, Georgia, USA
| | - Sarah Boyd
- International Trachoma Initiative, Task Force for Global Health, Atlanta, Georgia, USA
| | | | - Anna Harte
- Clinical Research Department, London School of Hygiene & Tropical Medicine, London, UK
| | | | | | | | | | - Wilfrid Batcho
- Programme National de Lutte contre les Maladies Transmissibles, Ministère De La Santé, Cotonou, Benin
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Burgert-Brucker CR, Adams MW, Mingkwan P, Flueckiger R, Ngondi JM, Solomon AW, Harding-Esch EM. Community-level trachoma ecological associations and the use of geospatial analysis methods: A systematic review. PLoS Negl Trop Dis 2022; 16:e0010272. [PMID: 35395003 PMCID: PMC9020723 DOI: 10.1371/journal.pntd.0010272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 04/20/2022] [Accepted: 02/21/2022] [Indexed: 11/25/2022] Open
Abstract
Background Trachoma is targeted for global elimination as a public health problem by 2030. Understanding individual, household, or community-associated factors that may lead to continued transmission or risk of recrudescence in areas where elimination has previously been achieved, is essential in reaching and maintaining trachoma elimination. We aimed to identify climatic, demographic, environmental, infrastructural, and socioeconomic factors associated in the literature with trachoma at community-level and assess the strength of their association with trachoma. Because of the potential power of geospatial analysis to delineate the variables most strongly associated with differences in trachoma prevalence, we then looked in detail at geospatial analysis methods used in previous trachoma studies. Methods We conducted a systematic literature review using five databases: Medline, Embase, Global Health, Dissertations & Theses Global, and Web of Science, including publications from January 1950 to January 2021. The review protocol was prospectively registered with PROSPERO (CRD42020191718). Results Of 35 eligible studies, 29 included 59 different trachoma-associated factors, with eight studies also including spatial analysis methods. Six studies included spatial analysis methods only. Higher trachomatous inflammation—follicular (TF) prevalence was associated with areas that: had lower mean annual precipitation, lower mean annual temperatures, and lower altitudes; were rural, were less accessible, had fewer medical services, had fewer schools; and had lower access to water and sanitation. Higher trachomatous trichiasis (TT) prevalence was associated with higher aridity index and increased distance to stable nightlights. Of the 14 studies that included spatial methods, 11 used exploratory spatial data analysis methods, three used interpolation methods, and seven used spatial modelling methods. Conclusion Researchers and decision-makers should consider the inclusion and potential influence of trachoma-associated factors as part of both research activities and programmatic priorities. The use of geospatial methods in trachoma studies remains limited but offers the potential to define disease hotspots and areas of potential recrudescence to inform local, national, and global programmatic needs. The ambitious target to eliminate trachoma as a public health problem has led to impressive strides in reducing the disease burden worldwide, with the implementation of the World Health Organization (WHO)-endorsed surgery, antibiotics, facial cleanliness and environmental improvement (SAFE) strategy. However, some areas have struggled to reach the elimination threshold after the prescribed number of antibiotic mass drug administration rounds, and some areas have had evidence of trachoma recrudescence after previously having reached the elimination threshold. This systematic review assessed climatic, demographic, environmental, infrastructural, and socioeconomic factors associated with trachoma to reveal which covariates are associated with ongoing or renewed trachoma transmission. We also explored how geospatial analysis, which could help identify areas with ongoing trachoma transmission or heightened risk of recrudescence, has been used in previous trachoma studies. Thirty-five studies met the inclusion criteria for the review. Results indicated that researchers and decision-makers should consider the inclusion and potential influence of precipitation, temperature, and altitude along with variables related to ruralness, accessibility, access to medical services and schools, and community-level water and sanitation coverage, as part of both research activities and programmatic priorities for trachoma elimination.
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Affiliation(s)
- Clara R. Burgert-Brucker
- RTI International, Washington, District of Columbia, United States of America
- London School of Hygiene & Tropical Medicine, London, United Kingdom
- * E-mail:
| | - Molly W. Adams
- RTI International, Washington, District of Columbia, United States of America
| | - Pia Mingkwan
- RTI International, Washington, District of Columbia, United States of America
- London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Rebecca Flueckiger
- RTI International, Washington, District of Columbia, United States of America
| | - Jeremiah M. Ngondi
- RTI International, Washington, District of Columbia, United States of America
| | - Anthony W. Solomon
- Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
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Niles RA, Thickstun CR, Cox H, Dilliott D, Burgert-Brucker CR, Harding-Esch EM, Clementson N, Sampson A, Alexandre JS, Morice Trejos AC, Scholte RGC, Krentel A. Assessing factors influencing communities' acceptability of mass drug administration for the elimination of lymphatic filariasis in Guyana. PLoS Negl Trop Dis 2021; 15:e0009596. [PMID: 34543269 PMCID: PMC8452018 DOI: 10.1371/journal.pntd.0009596] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 06/24/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Guyana is one of four countries in the Latin American Region where lymphatic filariasis (LF) remains endemic. In preparation for the introduction of a new triple drug therapy regimen (ivermectin, diethylcarbamazine, and albendazole (IDA)) in 2019, an acceptability study was embedded within sentinel site mapping in four regions to assess mass drug administration (MDA) coverage and compliance, acceptability, and perceptions about treatment and disease. The results from this survey would inform the rollout of IDA in Guyana in 2019. METHODS Data collection for the study occurred in August 2019, using a validated questionnaire administered by trained enumerators. Across all regions, a total of 1,248 participants were sampled by the Filarial Mapping team. Four-hundred and fifty-one participants aged over 18 years were randomly selected for participation in an expanded acceptability questionnaire. All data were captured in Secure Data Kit (SDK). RESULTS Acceptability was measured using a mean acceptability score. Unadjusted mean scores ranged from 24.6 to 29.3, with 22.5 as the threshold of acceptability. Regional variation occurred across many indicators of interest: self-rated understanding about LF, mechanisms of LF transmission, LF drug safety and history of treatment during MDA. Region IV (Georgetown) recorded higher knowledge about LF, but lower compliance and acceptability. Number of pills was not perceived as a concern. CONCLUSION Acceptability of MDA was good across all four regions under study. Results from this study set a baseline level for key indicators and acceptability, from which the acceptability of IDA can be measured. Regional variations across indicators suggest that localized approaches should be considered for social mobilization and MDA delivery to capture these contextual differences.
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Affiliation(s)
- Reza A. Niles
- Neglected Tropical Diseases Programme, Ministry of Health, Georgetown, Guyana
| | - Charles R. Thickstun
- School of Epidemiology and Public Health, University of Ottawa, Ontario, Canada
- Bruyère Research Institute, Ottawa, Ontario, Canada
| | - Horace Cox
- Neglected Tropical Diseases Programme, Ministry of Health, Georgetown, Guyana
| | | | | | - Emma M. Harding-Esch
- Clinical Research Department, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Nikita Clementson
- Neglected Tropical Diseases Programme, Ministry of Health, Georgetown, Guyana
| | - Annastacia Sampson
- Neglected Tropical Diseases Programme, Ministry of Health, Georgetown, Guyana
| | - Jean Seme Alexandre
- Neglected, Tropical, and Vector Borne Diseases, Pan American Health Organization, Washington DC, United States of America
| | - Ana C. Morice Trejos
- Neglected, Tropical, and Vector Borne Diseases, Pan American Health Organization, Washington DC, United States of America
| | - Ronaldo G. Carvalho Scholte
- Neglected, Tropical, and Vector Borne Diseases, Pan American Health Organization, Washington DC, United States of America
| | - Alison Krentel
- School of Epidemiology and Public Health, University of Ottawa, Ontario, Canada
- Bruyère Research Institute, Ottawa, Ontario, Canada
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Flueckiger RM, Stelmach R, Burgert-Brucker CR, Courtright P, Kabona G, Mosher AW, Mwingira UJ, Harding JC, Simon A, Ngondi J. Evaluating Precision of a Trachomatous Trichiasis (TT) Super Survey with Modulating Sample Sizes in Tanzania. Ophthalmic Epidemiol 2021; 29:394-400. [PMID: 34380006 DOI: 10.1080/09286586.2021.1950775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
As trachoma programs move towards eliminating trachoma as a public health problem, the number of surveys necessary to evaluate the status of trachomatous trichiasis (TT) increases. Currently, the World Health Organization endorses a district-level population-based prevalence survey for trachoma that involves a two-stage cluster design. We explored the validity of implementing this survey design in larger geographic areas to gain cost efficiencies. We evaluated the change in precision due to combining geographically contiguous and homogenous districts into single evaluation units (EUs) and modulating the sample size by running simulations on existing datasets. Preliminary findings from two opportunities in Tanzania show variability in the appropriateness in conducting this survey across larger geographies. These preliminary findings stress the importance of determining what is meant by homogeneity in terms of TT before combining multiple districts into a single EU.
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Affiliation(s)
- Rebecca M Flueckiger
- Global Health Division, International Development Group, RTI International, Washington, USA
| | - Rachel Stelmach
- Global Health Division, International Development Group, RTI International, Washington, USA
| | | | - Paul Courtright
- Kilimanjaro Centre for Community Ophthalmology, Division of Ophthalmology, University of Cape Town, Cape Town, South Africa
| | - George Kabona
- Neglected Tropical Disease Control Program, Ministry of Health and Social Welfare, Dar Es Salaam, Tanzania
| | - Aryc W Mosher
- Bureau for Global Health, United States Agency for International Development, Washington, USA
| | - Upendo J Mwingira
- Neglected Tropical Disease Control Program, Ministry of Health and Social Welfare, Dar Es Salaam, Tanzania
| | | | - Alistidia Simon
- Neglected Tropical Disease Control Program, Ministry of Health and Social Welfare, Dar Es Salaam, Tanzania
| | - Jeremiah Ngondi
- Global Health Division, International Development Group, RTI International, Dar Es Salaam, Tanzania
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Peven K, Taylor C, Purssell E, Mallick L, Burgert-Brucker CR, Day LT, Wong KLM, Kambala C, Bick D. Distance to available services for newborns at facilities in Malawi: A secondary analysis of survey and health facility data. PLoS One 2021; 16:e0254083. [PMID: 34234372 PMCID: PMC8263259 DOI: 10.1371/journal.pone.0254083] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 06/18/2021] [Indexed: 11/18/2022] Open
Abstract
Background Malawi has halved the neonatal mortality rate between 1990–2018, however, is not on track to achieve the Sustainable Development Goal 12 per 1,000 live births. Despite a high facility birth rate (91%), mother-newborn dyads may not remain in facilities long enough to receive recommended care and quality of care improvements are needed to reach global targets. Physical access and distance to health facilities remain barriers to quality postnatal care. Methods Using data We used individual data from the 2015–16 Malawi Demographic and Health Survey and facility data from the 2013–14 Malawi Service Provision Assessment, linking households to all health facilities within specified distances and travel times. We calculated service readiness scores for facilities to measure their capacity to provide birth/newborn care services. We fitted multi-level regression models to evaluate the association between the service readiness and appropriate newborn care (receiving at least five of six interventions). Results Households with recent births (n = 6010) linked to a median of two birth facilities within 5–10 km and one facility within a two-hour walk. The maximum service environment scores for linked facilities median was 77.5 for facilities within 5–10 km and 75.5 for facilities within a two-hour walk. While linking to one or more facilities within 5-10km or a two-hour walk was not associated with appropriate newborn care, higher levels of service readiness in nearby facilities was associated with an increased risk of appropriate newborn care. Conclusions Women’s choice of nearby facilities and quality facilities is limited. High quality newborn care is sub-optimal despite high coverage of facility birth and some newborn care interventions. While we did not find proximity to more facilities was associated with increased risk of appropriate care, high levels of service readiness was, showing facility birth and improved access to well-prepared facilities are important for improving newborn care.
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Affiliation(s)
- Kimberly Peven
- Florence Nightingale Faculty of Nursing, Midwifery & Palliative Care, Kings College London, London, United Kingdom
- Maternal and Newborn Health Group, Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom
- * E-mail:
| | - Cath Taylor
- School of Health Sciences, University of Surrey, Guildford, United Kingdom
| | | | - Lindsay Mallick
- University of Maryland, College Park, MD, United States of America
- Avenir Health, Glastonbury, CT, United States of America
| | - Clara R. Burgert-Brucker
- RTI International, Washington, DC and London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Louise T. Day
- Maternal and Newborn Health Group, Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Kerry L. M. Wong
- Centre for Mathematical Modelling of Infectious Diseases, Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Christabel Kambala
- Environmental Health Department, Malawi University of Business and Applied Sciences, Blantyre, Malawi
| | - Debra Bick
- Warwick Clinical Trials Unit, University of Warwick, Coventry, United Kingdom
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7
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Burgert-Brucker CR, Zoerhoff KL, Headland M, Shoemaker EA, Stelmach R, Karim MJ, Batcho W, Bougouma C, Bougma R, Benjamin Didier B, Georges N, Marfo B, Lemoine JF, Pangaribuan HU, Wijayanti E, Coulibaly YI, Doumbia SS, Rimal P, Salissou AB, Bah Y, Mwingira U, Nshala A, Muheki E, Shott J, Yevstigneyeva V, Ndayishimye E, Baker M, Kraemer J, Brady M. Risk factors associated with failing pre-transmission assessment surveys (pre-TAS) in lymphatic filariasis elimination programs: Results of a multi-country analysis. PLoS Negl Trop Dis 2020; 14:e0008301. [PMID: 32479495 PMCID: PMC7289444 DOI: 10.1371/journal.pntd.0008301] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 06/11/2020] [Accepted: 04/16/2020] [Indexed: 11/20/2022] Open
Abstract
Achieving elimination of lymphatic filariasis (LF) as a public health problem requires a minimum of five effective rounds of mass drug administration (MDA) and demonstrating low prevalence in subsequent assessments. The first assessments recommended by the World Health Organization (WHO) are sentinel and spot-check sites—referred to as pre-transmission assessment surveys (pre-TAS)—in each implementation unit after MDA. If pre-TAS shows that prevalence in each site has been lowered to less than 1% microfilaremia or less than 2% antigenemia, the implementation unit conducts a TAS to determine whether MDA can be stopped. Failure to pass pre-TAS means that further rounds of MDA are required. This study aims to understand factors influencing pre-TAS results using existing programmatic data from 554 implementation units, of which 74 (13%) failed, in 13 countries. Secondary data analysis was completed using existing data from Bangladesh, Benin, Burkina Faso, Cameroon, Ghana, Haiti, Indonesia, Mali, Nepal, Niger, Sierra Leone, Tanzania, and Uganda. Additional covariate data were obtained from spatial raster data sets. Bivariate analysis and multilinear regression were performed to establish potential relationships between variables and the pre-TAS result. Higher baseline prevalence and lower elevation were significant in the regression model. Variables statistically significantly associated with failure (p-value ≤0.05) in the bivariate analyses included baseline prevalence at or above 5% or 10%, use of Filariasis Test Strips (FTS), primary vector of Culex, treatment with diethylcarbamazine-albendazole, higher elevation, higher population density, higher enhanced vegetation index (EVI), higher annual rainfall, and 6 or more rounds of MDA. This paper reports for the first time factors associated with pre-TAS results from a multi-country analysis. This information can help countries more effectively forecast program activities, such as the potential need for more rounds of MDA, and prioritize resources to ensure adequate coverage of all persons in areas at highest risk of failing pre-TAS. Achieving elimination of lymphatic filariasis (LF) as a public health problem requires a minimum of five rounds of mass drug administration (MDA) and being able to demonstrate low prevalence in several subsequent assessments. LF elimination programs implement sentinel and spot-check site assessments, called pre-TAS, to determine whether districts are eligible to implement more rigorous population-based surveys to determine whether MDA can be stopped or if further rounds are required. Reasons for failing pre-TAS are not well understood and have not previously been examined with data compiled from multiple countries. For this analysis, we analyzed data from routine USAID and WHO reports from Bangladesh, Benin, Burkina Faso, Cameroon, Ghana, Haiti, Indonesia, Mali, Nepal, Niger, Sierra Leone, Tanzania, and Uganda. In a model that included multiple variables, high baseline prevalence and lower elevation were significant. In models comparing only one variable to the outcome, the following were statistically significantly associated with failure: higher baseline prevalence at or above 5% or 10%, use of the FTS, primary vector of Culex, treatment with diethylcarbamazine-albendazole, lower elevation, higher population density, higher Enhanced Vegetation Index, higher annual rainfall, and six or more rounds of mass drug administration. These results can help national programs plan MDA more effectively, e.g., by focusing resources on areas with higher baseline prevalence and/or lower elevation.
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Affiliation(s)
| | - Kathryn L. Zoerhoff
- Global Health Division, RTI International, Washington, DC, United States of America
| | - Maureen Headland
- Global Health Division, RTI International, Washington, DC, United States of America
- Global Health, Population, and Nutrition, FHI 360, Washington, DC, United States of America
| | - Erica A. Shoemaker
- Global Health Division, RTI International, Washington, DC, United States of America
| | - Rachel Stelmach
- Global Health Division, RTI International, Washington, DC, United States of America
| | | | - Wilfrid Batcho
- National Control Program of Communicable Diseases, Ministry of Health, Cotonou, Benin
| | - Clarisse Bougouma
- Lymphatic Filariasis Elimination Program, Ministère de la Santé, Ouagadougou, Burkina Faso
| | - Roland Bougma
- Lymphatic Filariasis Elimination Program, Ministère de la Santé, Ouagadougou, Burkina Faso
| | - Biholong Benjamin Didier
- National Onchocerciasis and Lymphatic Filariasis Control Program, Ministry of Health, Yaounde, Cameroon
| | - Nko'Ayissi Georges
- National Onchocerciasis and Lymphatic Filariasis Control Program, Ministry of Health, Yaounde, Cameroon
| | - Benjamin Marfo
- Neglected Tropical Diseases Programme, Ghana Health Service, Accra, Ghana
| | | | | | - Eksi Wijayanti
- National Institute Health Research & Development, Ministry of Health, Jakarta, Indonesia
| | - Yaya Ibrahim Coulibaly
- Filariasis Unit, International Center of Excellence in Research, Faculty of Medicine and Odontostomatology, Bamako, Mali
| | - Salif Seriba Doumbia
- Filariasis Unit, International Center of Excellence in Research, Faculty of Medicine and Odontostomatology, Bamako, Mali
| | - Pradip Rimal
- Epidemiology and Disease Control Division, Department of Health Service, Kathmandu, Nepal
| | | | - Yukaba Bah
- National Neglected Tropical Disease Program, Ministry of Health and Sanitation, Freetown, Sierra Leone
| | - Upendo Mwingira
- Neglected Tropical Disease Control Programme, National Institute for Medical Research, Dar es Salaam, Tanzania
| | - Andreas Nshala
- IMA World Health/Tanzania NTD Control Programme, Uppsala University, & TIBA Fellow, Dar es Salaam, Tanzania
| | - Edridah Muheki
- Programme to Eliminate Lymphatic Filariasis, Ministry of Health, Kampala, Uganda
| | - Joseph Shott
- Division of Neglected Tropical Diseases, Office of Infectious Diseases, Bureau for Global Health, USAID, Washington, DC, United States of America
| | - Violetta Yevstigneyeva
- Division of Neglected Tropical Diseases, Office of Infectious Diseases, Bureau for Global Health, USAID, Washington, DC, United States of America
| | - Egide Ndayishimye
- Global Health, Population, and Nutrition, FHI 360, Washington, DC, United States of America
| | - Margaret Baker
- Global Health Division, RTI International, Washington, DC, United States of America
| | - John Kraemer
- Global Health Division, RTI International, Washington, DC, United States of America
- Georgetown University, Washington, DC, United States of America
| | - Molly Brady
- Global Health Division, RTI International, Washington, DC, United States of America
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Koenker H, Taylor C, Burgert-Brucker CR, Thwing J, Fish T, Kilian A. Quantifying Seasonal Variation in Insecticide-Treated Net Use among Those with Access. Am J Trop Med Hyg 2020; 101:371-382. [PMID: 31264562 PMCID: PMC6685578 DOI: 10.4269/ajtmh.19-0249] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Seasonal variation in the proportion of the population using an insecticide-treated net (ITN) is well documented and is widely believed to be dependent on mosquito abundance and heat, driven by rainfall and temperature. However, seasonal variation in ITN use has not been quantified controlling for ITN access. Demographic and Health Survey and Malaria Indicator Survey datasets, their georeferenced data, and public rainfall and climate layers were pooled for 21 countries. Nine rainfall typologies were developed from rainfall patterns in Köppen climate zones. For each typology, the odds of ITN use among individuals with access to an ITN within their households (“ITN use given access”) were estimated for each month of the year, controlling for region, wealth quintile, residence, year, temperature, and malaria parasitemia level. Seasonality of ITN use given access was observed over all nine rainfall typologies and was most pronounced in arid climates and less pronounced where rainfall was relatively constant throughout the year. Peak ITN use occurred 1–3 months after peak rainfall and corresponded with peak malaria incidence and average malaria transmission season. The observed lags between peak rainfall and peak ITN use given access suggest that net use is triggered by mosquito density. In equatorial areas, ITN use is likely to be high year-round, given the presence of mosquitoes and an associated year-round perceived malaria risk. These results can be used to inform behavior change interventions to improve ITN use in specific times of the year and to inform geospatial models of the impact of ITNs on transmission.
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Affiliation(s)
- Hannah Koenker
- PMI VectorWorks Project, Johns Hopkins Bloomberg School of Public Health Center for Communication Programs, Baltimore, Maryland
| | - Cameron Taylor
- The Demographic and Health Surveys (DHS) Program, ICF, Rockville, Maryland
| | - Clara R Burgert-Brucker
- RTI International, Washington, District of Columbia.,The Demographic and Health Surveys (DHS) Program, ICF, Rockville, Maryland
| | - Julie Thwing
- Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Tom Fish
- The Demographic and Health Surveys (DHS) Program, ICF, Rockville, Maryland
| | - Albert Kilian
- PMI VectorWorks Project, Tropical Health LLP, Montagut, Spain
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Grace K, Nagle NN, Burgert-Brucker CR, Rutzick S, Van Riper DC, Dontamsetti T, Croft T. Integrating Environmental Context into DHS Analysis While Protecting Participant Confidentiality: A New Remote Sensing Method. Popul Dev Rev 2019; 45:197-218. [PMID: 30983647 PMCID: PMC6446718 DOI: 10.1111/padr.12222] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
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10
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Abstract
Spatially interpolated map surface datasets for key development indicators are being produced and publicly shared using population-based surveys from the USAID-funded Demographic and Health Survey (DHS) Program. Each modeled surface is produced with standardized geostatistical modeling methods. For each indicator, a package is available that includes spatial raster grids of 5 × 5 km pixels for the point estimate surface and an uncertainty surface, along with validation statistics and other model diagnostic data. The maps are publicly available for download on the DHS Program Spatial Data Repository at http://spatialdata.dhsprogram.com/. The modeled surfaces are produced with publicly available geo-referenced data on each indicator as collected by the DHS Program, augmented with other relevant spatial data sources that act as covariates. A Bayesian model-based geostatistical (MBG) approach is used to generate the modeled surfaces. Spatially modeled surfaces can be used to support and improve decision-making at multiple levels within many development programs including health, population, family planning, nutrition, and water and sanitation. The modeled surfaces can be used in their original 5 × 5 km pixel format, operationalized to other geographic areas as relevant for the program, or linked to DHS or other survey data for additional analysis.
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11
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Wang W, Winner M, Burgert-Brucker CR. Limited Service Availability, Readiness, and Use of Facility-Based Delivery Care in Haiti: A Study Linking Health Facility Data and Population Data. Glob Health Sci Pract 2017; 5:244-260. [PMID: 28539502 PMCID: PMC5487087 DOI: 10.9745/ghsp-d-16-00311] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 03/13/2017] [Indexed: 11/25/2022]
Abstract
Proximity to a health facility offering delivery services and readiness of the facilities to provide such services were poor in both rural and urban areas outside of Port-au-Prince. Availability of a proximate facility was significantly associated with women in rural and urban areas delivering at a facility, as was the quality of delivery care available at the facilities but only in urban areas. Background: Understanding the barriers that women in Haiti face to giving birth at a health facility is important for improving coverage of facility delivery and reducing persistently high maternal mortality. We linked health facility survey data and population survey data to assess the role of the obstetric service environment in affecting women's use of facility delivery care. Methods: Data came from the 2012 Haiti Demographic and Health Survey (DHS) and the 2013 Haiti Service Provision Assessment (SPA) survey. DHS clusters and SPA facilities were linked with their geographic coordinate information. The final analysis sample from the DHS comprised 4,921 women who had a live birth in the 5 years preceding the survey. Service availability was measured with the number of facilities providing delivery services within a specified distance from the cluster (within 5 kilometers for urban areas and 10 kilometers for rural areas). We measured facility readiness to provide obstetric care using 37 indicators defined by the World Health Organization. Random-intercept logistic regressions were used to model the variation in individual use of facility-based delivery care and cluster-level service availability and readiness, adjusting for other factors. Results: Overall, 39% of women delivered their most recent birth at a health facility and 61% delivered at home, with disparities by residence (about 60% delivered at a health facility in urban areas vs. 24% in rural areas). About one-fifth (18%) of women in rural areas and one-tenth (12%) of women in nonmetropolitan urban areas lived in clusters where no facility offered delivery care within the specified distances, while nearly all women (99%) in the metropolitan area lived in clusters that had at least 2 such facilities. Urban clusters had better service readiness compared with rural clusters, with a wide range of variation in both areas. Regression models indicated that in both rural and nonmetropolitan urban areas availability of delivery services was significantly associated with women's greater likelihood of using facility-based delivery care after controlling for other covariates, while facilities' readiness to provide delivery services was also important in nonmetropolitan urban areas. Conclusion: Increasing physical access to delivery care should become a high priority in rural Haiti. In urban areas, where delivery services are more available than in rural areas, improving quality of care at facilities could potentially lead to increased coverage of facility delivery.
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Affiliation(s)
- Wenjuan Wang
- The Demographic and Health Surveys (DHS) Program, ICF, Rockville, MD, USA.
| | - Michelle Winner
- The Demographic and Health Surveys (DHS) Program, ICF, Rockville, MD, USA
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