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An Ensemble Framework for Projecting the Impact of Lymphatic Filariasis Interventions Across Sub-Saharan Africa at a Fine Spatial Scale.

Touloupou, Panayiota, Fronterre, Claudio, Cano, Jorge, Prada, Joaquin M, Smith, Morgan, Kontoroupis, Periklis, Brown, Paul, Rivera, Rocio Caja, de Vlas, Sake J, Gunawardena, Sharmini, Irvine, Michael A, Njenga, Sammy M, Reimer, Lisa ORCID: https://orcid.org/0000-0002-9711-4981, Seife, Fikre, Sharma, Swarnali, Michael, Edwin, Stolk, Wilma A, Pulan, Rachel, Spencer, Simon E F and Hollingsworth, T Déirdre (2024) 'An Ensemble Framework for Projecting the Impact of Lymphatic Filariasis Interventions Across Sub-Saharan Africa at a Fine Spatial Scale.'. Clinical Infectious Diseases, Vol 78, Issue Supplement_2, S108-S116.

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Abstract

Background
Lymphatic filariasis (LF) is a neglected tropical disease targeted for elimination as a public health problem by 2030. Although mass treatments have led to huge reductions in LF prevalence, some countries or regions may find it difficult to achieve elimination by 2030 owing to various factors, including local differences in transmission. Subnational projections of intervention impact are a useful tool in understanding these dynamics, but correctly characterizing their uncertainty is challenging.
Methods
We developed a computationally feasible framework for providing subnational projections for LF across 44 sub-Saharan African countries using ensemble models, guided by historical control data, to allow assessment of the role of subnational heterogeneities in global goal achievement. Projected scenarios include ongoing annual treatment from 2018 to 2030, enhanced coverage, and biannual treatment.
Results
Our projections suggest that progress is likely to continue well. However, highly endemic locations currently deploying strategies with the lower World Health Organization recommended coverage (65%) and frequency (annual) are expected to have slow decreases in prevalence. Increasing intervention frequency or coverage can accelerate progress by up to 5 or 6 years, respectively.
Conclusions
While projections based on baseline data have limitations, our methodological advancements provide assessments of potential bottlenecks for the global goals for LF arising from subnational heterogeneities. In particular, areas with high baseline prevalence may face challenges in achieving the 2030 goals, extending the "tail" of interventions. Enhancing intervention frequency and/or coverage will accelerate progress. Our approach facilitates preimplementation assessments of the impact of local interventions and is applicable to other regions and neglected tropical diseases.

Item Type: Article
Subjects: WA Public Health > WA 30 Socioeconomic factors in public health (General)
WA Public Health > Health Administration and Organization > WA 540 National and state health administration
WC Communicable Diseases > WC 20 Research (General)
WC Communicable Diseases > Tropical and Parasitic Diseases > WC 880 Filariasis and related conditions (General)
Faculty: Department: Biological Sciences > Vector Biology Department
Digital Object Identifer (DOI): https://doi.org/10.1093/cid/ciae071
SWORD Depositor: JISC Pubrouter
Depositing User: JISC Pubrouter
Date Deposited: 07 May 2024 14:27
Last Modified: 07 May 2024 14:27
URI: https://archive.lstmed.ac.uk/id/eprint/24496

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