Repellents as Added Control Measure to Long Lasting Insecticidal Nets

NCT ID: NCT01663831

Last Updated: 2025-05-11

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

40000 participants

Study Classification

INTERVENTIONAL

Study Start Date

2012-05-31

Study Completion Date

2013-12-31

Brief Summary

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The scaling up of Long Lasting Insecticidal Nets (LLIN) and the expansion of Indoor Residual Spraying (IRS) has contributed to a significant decrease of malaria worldwide. However these control methods tackle only indoor and night biting vectors. The proportion of transmission occurring outdoors and before sleeping hours or so-called "residual transmission" is steadily increasing and may compromise the effort towards malaria elimination.

The purpose of this study is to raise evidence on the effectiveness of mass use of topical repellents in addition to LLINs in controlling malaria infections.

A multidisciplinary approach will be used to collect information on the most important factors that contribute to the successful reduction of "residual malaria transmission". In a first objective the epidemiological efficacy of repellents on prevalence of malaria carriers and malaria incidence will be assessed. To achieve this goal 98 communities will be randomly assigned to one of two treatment arms (LLIN and LLIN + repellent). Within a community a cross sectional random sample of 65 people will be drawn at the beginning and the end of the malaria season to obtain an estimate of the malaria prevalence. The second objective will handle the entomological efficacy and persistence of the topical repellent on malaria vectors. And lastly the acceptability, adherence and adequacy of the topical repellents will be studied in a third objective.

Detailed Description

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Conditions

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Malaria

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

NONE

Study Groups

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Topical Repellent & LLIN

Group Type EXPERIMENTAL

Mosquito topical repellent

Intervention Type OTHER

Daily repellent use, before and after sleeping hours during the malaria season (6 months) in addition to the use of Long Lasting Insecticidal Nets during sleeping hours.

Long Lasting Insecticidal Nets

Brand Name LLIN: Olyset Net

Active ingredient: permethrin

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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Mosquito topical repellent

Daily repellent use, before and after sleeping hours during the malaria season (6 months) in addition to the use of Long Lasting Insecticidal Nets during sleeping hours.

Intervention Type OTHER

Other Intervention Names

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Brand name: Autan Active ingredient: Icaridin

Eligibility Criteria

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Inclusion Criteria

* All household members volunteering from selected communities

Exclusion Criteria

* Infants less than 2 years
Minimum Eligible Age

2 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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NCHADS - Ministry of Health of Cambodia

OTHER

Sponsor Role collaborator

Institut Pasteur

INDUSTRY

Sponsor Role collaborator

Institute of Tropical Medicine, Belgium

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Marc Coosemans, Professor

Role: PRINCIPAL_INVESTIGATOR

Institute of Tropical Medicine Antwerp

Locations

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Banlung, Ratanakiri, Cambodia

Site Status

Countries

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Cambodia

References

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Sluydts V, Durnez L, Heng S, Gryseels C, Canier L, Kim S, Van Roey K, Kerkhof K, Khim N, Mao S, Uk S, Sovannaroth S, Grietens KP, Sochantha T, Menard D, Coosemans M. Efficacy of topical mosquito repellent (picaridin) plus long-lasting insecticidal nets versus long-lasting insecticidal nets alone for control of malaria: a cluster randomised controlled trial. Lancet Infect Dis. 2016 Oct;16(10):1169-1177. doi: 10.1016/S1473-3099(16)30148-7. Epub 2016 Jun 29.

Reference Type DERIVED
PMID: 27371977 (View on PubMed)

Heng S, Durnez L, Gryseels C, Van Roey K, Mean V, Uk S, Siv S, Grietens KP, Sochantha T, Coosemans M, Sluydts V. Assuring access to topical mosquito repellents within an intensive distribution scheme: a case study in a remote province of Cambodia. Malar J. 2015 Nov 24;14:468. doi: 10.1186/s12936-015-0960-4.

Reference Type DERIVED
PMID: 26597653 (View on PubMed)

Canier L, Khim N, Kim S, Sluydts V, Heng S, Dourng D, Eam R, Chy S, Khean C, Loch K, Ken M, Lim H, Siv S, Tho S, Masse-Navette P, Gryseels C, Uk S, Van Roey K, Grietens KP, Sokny M, Thavrin B, Chuor CM, Deubel V, Durnez L, Coosemans M, Menard D. An innovative tool for moving malaria PCR detection of parasite reservoir into the field. Malar J. 2013 Nov 9;12:405. doi: 10.1186/1475-2875-12-405.

Reference Type DERIVED
PMID: 24206649 (View on PubMed)

Other Identifiers

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OPP1032354

Identifier Type: -

Identifier Source: org_study_id

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