Evidence map›Paper›PMID 38527064›Full record

ArticlePLoS neglected tropical diseases2024

The national distribution of lymphatic filariasis cases in Malawi using patient mapping and geostatistical modelling.

Carrie Barrett, John Chiphwanya, Square Mkwanda, Dorothy E Matipula, Paul Ndhlovu, Limbikani Chaponda, Joseph D Turner, Emanuele Giorgi, Hannah Betts, Sarah Martindale and 3 more

Abstract read
In one paragraph

Article in PLoS neglected tropical diseases, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

3 citing papers in PubMed.

  1. Article
  2. Article
  3. Prevalence of elephantiasis, an overlooked disease in Southern Africa: a comprehensive review.The journal of venomous animals and toxins including tropical diseases · 2024
    Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors.

Carrie BarrettCentre for Neglected Tropical Disease, Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom.ORCID 0009-0004-8623-383X
John ChiphwanyaNational Lymphatic Filariasis Elimination Programme, Ministry of Health, Lilongwe, Malawi.
Square MkwandaNational Lymphatic Filariasis Elimination Programme, Ministry of Health, Lilongwe, Malawi.
Dorothy E MatipulaNational Lymphatic Filariasis Elimination Programme, Ministry of Health, Lilongwe, Malawi.
Paul NdhlovuNational Lymphatic Filariasis Elimination Programme, Ministry of Health, Lilongwe, Malawi.
Limbikani ChapondaNational Lymphatic Filariasis Elimination Programme, Ministry of Health, Lilongwe, Malawi.
Joseph D TurnerCentre for Neglected Tropical Disease, Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom.
Emanuele GiorgiLancaster Medical School, South West Drive, Bailrigg, Lancaster, United Kingdom.
Hannah BettsCentre for Neglected Tropical Disease, Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom.
Sarah MartindaleCentre for Neglected Tropical Disease, Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom.
Mark J TaylorCentre for Neglected Tropical Disease, Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom.
Jonathan M ReadLancaster Medical School, South West Drive, Bailrigg, Lancaster, United Kingdom.
Louise A Kelly-HopeCentre for Neglected Tropical Disease, Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom.

Funding

Centre for Neglected Tropical Diseases, Liverpool School of Tropical MedicineDepartment for International Development (DFID)Medical Research Council 2267306
6 · The paper itself

Abstract

backgroundIn 2020 the World Health Organization (WHO) declared that Malawi had successfully eliminated lymphatic filariasis (LF) as a public health problem. Understanding clinical case distributions at a national and sub-national level is important, so essential care packages can be provided to individuals living with LF symptoms. This study aimed to develop a national database and map of LF clinical cases across Malawi using geostatistical modelling approaches, programme-identified clinical cases, antigenaemia prevalence and climate information. METHODOLOGY: LF clinical cases identified through programme house-to-house surveys across 90 sub-district administrative boundaries (Traditional Authority (TA)) and antigenaemia prevalence from 57 sampled villages in Malawi were used in a two-step geostatistical modelling process to predict LF clinical cases across all TAs of the country. First, we modelled antigenaemia prevalence in relation to climate covariates to predict nationwide antigenaemia prevalence. Second, we modelled clinical cases for unmapped TAs based on our antigenaemia prevalence spatial estimates. PRINCIPLE

findingsThe models estimated 20,938 (95% CrI 18,091 to 24,071) clinical cases in unmapped TAs (70.3%) in addition to the 8,856 (29.7%), programme-identified cases in mapped TAs. In total, the overall national number of LF clinical cases was estimated to be 29,794 (95% CrI 26,957 to 32,927). The antigenaemia prevalence and clinical case mapping and modelling found the highest burden of disease in Chikwawa and Nsanje districts in the Southern Region and Karonga district in the Northern Region of the country.

conclusionsThe models presented in this study have facilitated the development of the first national LF clinical case database and map in Malawi, the first endemic country in sub-Saharan Africa. It highlights the value of using existing LF antigenaemia prevalence and clinical case data together with modelling approaches to produce estimates that may be used for the WHO dossier requirements, to help target limited resources and implement long-term health strategies.

Indexed as

Elephantiasis, FilarialData ManagementHumansMalawiPrevalenceSurveys and Questionnaires

Identifiers

PMID38527064
PMCPMC11018277

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.