Evidence map›Paper›PMID 33916264›Full record

ArticleTropical medicine and infectious disease2021

Triple-Drug Treatment Is Effective for Lymphatic Filariasis Microfilaria Clearance in Samoa.

Patricia M Graves, Sarah Sheridan, Jessica Scott, Filipina Amosa-Lei Sam, Take Naseri, Robert Thomsen, Christopher L King, Colleen L Lau

Open access · goldAbstract read
In one paragraph

Article in Tropical medicine and infectious disease, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
0.8field-weighted citation impact, top 25% of its field
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

11 citing papers in PubMed, 1 synthesis or guideline pooled it, 18 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Progression of lymphatic filariasis antigenaemia and microfilaraemia over 4.5 years in antigen-positive individuals, Samoa 2019-2023.International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases · 2025
    Article
  5. Article
  6. Recurrence of microfilaraemia after triple-drug therapy for lymphatic filariasis in Samoa: Recrudescence or reinfection?International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases · 2025
    Article
  7. Article
  8. Article
  9. Article
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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

8 authors at 5 institutions in 3 countries.

Patricia M GravesCollege of Public Health, Medical and Veterinary Sciences, James Cook University, Cairns, QLD 4870 and Townsville, QLD 4811, Australia.ORCID 0000-0002-5215-3901
Sarah SheridanSchool of Public Health and Community Medicine, University of New South Wales, Sydney NSW 2033, Australia.
Jessica ScottCollege of Public Health, Medical and Veterinary Sciences, James Cook University, Cairns, QLD 4870 and Townsville, QLD 4811, Australia.
Filipina Amosa-Lei SamSchool of Medicine, National University of Samoa, Apia, Samoa.
Take NaseriMinistry of Health, Apia, Samoa.
Robert ThomsenMinistry of Health, Apia, Samoa.
Christopher L KingCenter for Global Health, School of Medicine and Veterans Affairs Administration, Case Western Reserve University, Cleveland, OH 44106, USA.
Colleen L LauSchool of Public Health, The University of Queensland, Brisbane, QLD 4006, Australia.ORCID 0000-0001-8288-4169
James Cook University · AUAustralian National University · AUCenter for Global Health · USNational University of Samoa · WSUNSW Sydney · AU

Funding

Bill and Melinda Gates Foundation - Task Force for Global Health OPP1053230
6 · The paper itself

Abstract

Following the first triple-drug mass drug administration (MDA) for lymphatic filariasis in Samoa in 2018, unexpected persistence of microfilaria (Mf) positivity in 18 (15%) of 121 antigen-positive persons was observed in a nationwide household survey 1-2 months later. Of the 18 Mf positive persons, 14 reported taking the MDA, raising concerns about MDA efficacy. In 2019, 5-6 months after the 2018 survey, a monitored treatment study was done to evaluate directly observed weight-based treatment in these Mf positive individuals. Mf presence and density were assessed before and 7 days after treatment, using 1 mL membrane filtered venous blood, and 60 uL thick blood films on slides prepared from venous or fingerprick blood. All 14 participants were still Mf positive on filters from venous blood pre-treatment samples, but two were negative by slide made from the same samples. Mf were cleared completely by day 7 in 12 of 13 participants followed up, and by day 30 in the remaining participant. Filtered blood using EDTA samples (to reduce clumping of Mf) is preferred over slides alone for improving the likelihood of detecting Mf and estimating their density. The triple-drug MDA strategy was effective at clearing Mf when given and taken at the correct dose.

Indexed as

albendazoleDECivermectinlymphatic filariasismicrofilariaSamoa

Identifiers

PMID33916264
PMCPMC8167748
OpenAlexW3141954110

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.