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Three-arm Cluster Randomised Control Trial Evaluation of Guardian Spatial Emanator as a Complimentary Vector Control Tool in Papua New Guinea (WinMal)

WinMal Trial: Spatial Emanator Deployment Strategies for Malaria Control in Papua New Guinea

Malaria cases are increasing in Papua New Guinea, partly because insecticide-treated nets do not fully protect people, especially from mosquitoes that bite outdoors. Spatial emanators are new devices that release insecticide into the air to repel or kill mosquitoes. This study will test whether these devices reduce malaria infections in rural villages in Madang Province by comparing households using indoor or outdoor devices with those without them. The results will help guide national malaria control strategies.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

The WinMal trial is a large-scale cluster randomised control trial investigating whether spatial emanators reduce transmission of malaria infections. The study is being conducted with 150 rural villages in Bogia, Sumkar, Madang and Rai Coast districts of Madang Province, Papua New Guinea.

The trial will address the question: 'Do Guardian spatial emanators reduce malaria transmission when deployed in protected outdoor spaces or inside houses in PNG?'

The trial will evaluate the effectiveness, acceptability and feasibility of Guardian SE deployed indoors and outdoors for malaria prevention in PNG.

The WinMal trial will provide evidence to guide PNG National Department of Health decisions on how spatial emanators could be deployed alongside ITNs to address gaps in protection from outdoor biting.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

4350

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

    • Madang Province
      • Madang, Madang Province, Papua Ny Guinea
        • Sumkar, Bogia, Rai Coast and Madang Districts of Madang Province, Papua New Guinea

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

9 år til 14 år (Barn)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Children aged 9-14 years at enrolment
  • Sleeps in a household within allocated cluster >90% of the nights during any given month

Exclusion Criteria:

  • Dissent (by child) to participate in the study
  • No parental consent provided through the signing of informed consent form
  • Unwillingness to take G6PD-guided radical cure treatment at enrolment with no previous ADRs to AL or PQ
  • Plans for extended travel (>2 weeks) outside of household/cluster during the study
  • G6PD activity ≤6.0 U/g Hb at screening
  • Measured baseline of ≤8 mg/dL or who have signs of clinical decompensation
  • Participating or planning to participate in another clinical trial investigating a drug, vaccine, medical device, or procedure during the study period
  • Currently taking malaria prophylaxis

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Forebyggelse
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Outdoor intervention arm

Guardian spatial emanators deployed in protected outdoor spaces, households will continue to use ITNs as per routine National Malaria Control Program

Guardian spatial emanators deployed in protected outdoor spaces

Eksperimentel: Indoor intervention arm

Guardian spatial emanators deployed inside houses, households will continue to use ITNs as per routine National Malaria Control Program

Guardian spatial emanators deployed inside houses

Ingen indgriben: Control arm

No spatial emanators deployed, households will continue to use ITNs as per routine National Malaria Control Program

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Effectiveness of Guardian Spatial Emanator
Tidsramme: 12 months

Time to first Plasmodium spp. infection detected by PCR at monthly follow-up visits or symptomatic ad-hoc visit between follow-ups over the 12-month intervention period in cohort participants from the core of the clusters.

12 months

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Effectiveness of Guardian Spatial Emanator
Tidsramme: 12 months

Time to first PCR-confirmed P. falciparum infection over the 12 months of follow-up.

Time to first PCR-confirmed P. vivax infection over the 12 months of follow-up.

12 months
Effectiveness of Guardian Spatial Emanator
Tidsramme: 6 months

Time to first PCR-confirmed Plasmodium spp infection over the first 6 months of follow-up.

Time to first PCR-confirmed P. falciparum infection over the first 6 months of follow-up.

Time to first PCR-confirmed P. vivax infection over the first 6 months of follow-up.

6 months
Effectiveness of Guardian Spatial Emanator
Tidsramme: 12 months

Incidence of PCR-confirmed Plasmodium spp infections (first-time & recurrent together) in first 6m & full 12m.

Incidence of PCR-confirmed Pf infections (first-time & recurrent together) in first 6m & full 12m.

Incidence of PCR-confirmed Pv infections (first-time & recurrent together) in first 6m & full 12m Incidence of clinical episodes of malaria (first-time & recurrent together) in first 6m & full 12m Incidence of Pf clinical episodes of malaria (first-time & recurrent together) in first 6m & full 12m Incidence of Pv clinical episodes of malaria (first-time & recurrent together) in first 6m & full 12m Incidence of new Pf blood stage infections (molecular force of blood-stage infection - Pf molFOB) in first 6m & full 12m Incidence of new Pv blood stage infections (molecular force of blood-stage infection - Pv molFOB) in first 6m & full 12m Incidence of new blood stage infections (molecular force of blood-stage infection for Pf and Pv molFOB combined) in first 6m & full 12m

12 months
Difference between indoor and outdoor arms
Tidsramme: 12 months

Time to first Plasmodium spp. infection detected by PCR at monthly follow-up or symptomatic ad-hoc visit between follow-ups visits over the 12-month intervention period in cohort participants from the core of the clusters.

12 months
Sensitivity of the estimates for epidemiological outcomes
Tidsramme: 12 months

Spillover-adjusted estimates of intervention effectiveness for epidemiological endpoints, incorporating data from cluster buffer zone participants.

12 months
Anopheles species composition
Tidsramme: 12 months

Anopheles species composition in a subset of clusters, in the pre-deployment baseline period and at the end of the intervention.

12 months
Presence of insecticide resistance mutations
Tidsramme: 12 months

Prevalence of insecticide resistance markers in a subset of clusters in the pre-deployment baseline period and at the end of the intervention.

12 months
Acceptability of spatial emanators
Tidsramme: 12 months

Qualitative outcomes from Photovoice methodology, and associated focus group discussions with community members, followed by thematic analysis of drivers of behaviour change, barriers and enablers of spatial emanator acceptance and consistent use.

12 months
Feasibility of spatial emanators
Tidsramme: 12 months

Qualitative outcomes from key informant interviews with key study staff and health system stakeholders at district, provincial, and national level followed by descriptive summary of barriers and enablers to distribution, implementation & scale-up.

12 months
Cost effectiveness of Guardian spatial emanators
Tidsramme: 12 months

The costs of deploying spatial emanators (either indoor or outdoor) and the incremental cost-effectiveness ratios when compared with current practice.

12 months
Self-reported adverse events
Tidsramme: 12 months

Incidence of self-reported adverse events (AEs) and/or serious adverse events (SAEs) assessed as possibly or likely related to Guardian spatial emanators among cohort participants (through monthly follow-up) and wider community through passive surveillance.

12 months
Coverage, attrition and re-location of spatial emanators
Tidsramme: 12 months

Proportion of households with emanators in place at scheduled monitoring visits, the attrition rate per cluster per scheduled monitoring visit period, timing of redistribution events recorded per cluster.

12 months
Transfluthrin quantity, installation environment and bioefficacy
Tidsramme: 12 months

Mass percent transfluthrin retained in the spatial emanators related to installation environment and bioefficacy measure/s (e.g., knock down and mortality of colony mosquitoes exposed to spatial emanators).

12 months

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Samarbejdspartnere

Efterforskere

  • Ledende efterforsker: Leanne Robinson, MPH PhD, Burnet Institute
  • Ledende efterforsker: Moses Laman, MBBS PHD, Papua New Guinea Institute of Medical Research
  • Ledende efterforsker: Stephan Karl, PhD, James Cook University, Queensland, Australia
  • Ledende efterforsker: Jacob Kisomb, MBBS, National Department of Health, Papua New Guinea
  • Ledende efterforsker: Maria Ome-Kaius, MBBS PhD, Papua New Guinea Institute of Medical Research

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

1. februar 2027

Primær færdiggørelse (Anslået)

1. oktober 2028

Studieafslutning (Anslået)

1. december 2028

Datoer for studieregistrering

Først indsendt

27. oktober 2026

Først indsendt, der opfyldte QC-kriterier

27. oktober 2026

Først opslået (Faktiske)

3. november 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

3. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

27. oktober 2026

Sidst verificeret

1. oktober 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • NATNAT WinMal cRCT

Plan for individuelle deltagerdata (IPD)

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