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Community-wide versus school-based targeted deworming for soil-transmitted helminth control in school-aged children in Vietnam: the CoDe-STH cluster-randomised controlled trial. | LitMetric

AI Article Synopsis

  • The CoDe-STH trial in Dak Lak, Vietnam, tested whether community-wide mass drug administration (MDA) is more effective than school-based preventive chemotherapy (PC) alone in reducing soil-transmitted helminth (STH) infections in schoolchildren.
  • The study involved 64 primary schools, randomly assigned to either the school arm (targeted PC) or community arm (MDA), with children receiving a single dose of albendazole for deworming.
  • While both approaches reduced hookworm prevalence similarly, the community arm showed a significantly greater reduction in infection intensity, demonstrating the advantage of community-wide treatment in managing STH infections.

Article Abstract

Background: Soil-transmitted helminth (STH) infection control programs typically consist of school-based preventive chemotherapy (PC) targeted to school-aged children. STH reservoirs in untreated community members contribute to ongoing transmission in children. The CoDe-STH (Community Deworming against STH) trial, conducted in Dak Lak province, Vietnam, between October 2019 and November 2020, aimed to determine whether community-wide mass drug administration (MDA) is more effective than school-based targeted PC in reducing STH prevalence and intensity in children.

Methods: In this two-arm cluster randomised controlled trial, 64 primary schools were randomly assigned 1:1 to receive either school-based targeted PC ("school arm") or community-wide MDA ("community arm"). A single dose of albendazole 400 mg was used for deworming. The primary outcome was hookworm prevalence in schoolchildren, measured using quantitative real-time PCR. We also measured infection intensity for only, using qPCR cycle threshold (Ct) values converted into eggs per gram of faeces (EPG). Analysis was by intention to treat. The trial was registered with the Australian New Zealand Clinical Trials Registry (ACTRN12619000309189).

Findings: The analysis included 4955 children in the school arm and 5093 children in the community arm. was the dominant STH species. The relative reduction in hookworm prevalence was not significantly different between the school arm (30.1%, 95% confidence interval [CI] 20.5-36.9) and the community arm (34.6%, 95% CI 19.9-49.4). Due to lower baseline prevalence than expected, the study was underpowered to detect a difference in prevalence reduction between the study arms. The community arm showed significantly greater relative reduction in infection intensity (56.0%, 95% CI 39.9-72.1) compared to the school arm (3.4%, 95% CI -24.7 to 31.4). The community arm also showed greater relative reduction in prevalence of moderate-to-heavy intensity (≥2000 EPG) infections (81.1%; 95% CI 69.7-92.6) compared to the school arm (39.0%, 95% CI 13.7-64.2).

Interpretation: Although no impact was seen on overall prevalence, community-wide MDA was more effective in lowering infection intensity in schoolchildren compared to school-based targeted PC, measured 12 months after one round of albendazole deworming with high coverage.

Funding: National Health and Medical Research Council, Australia (APP1139561).

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10583164PMC
http://dx.doi.org/10.1016/j.lanwpc.2023.100920DOI Listing

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