Repellents as Added Control Measure to Long Lasting Insecticidal Nets

Not Applicable

Completed

• Conditions: Malaria
• Interventions: Other: Mosquito topical repellent

• Registration Number: NCT01663831
• Lead Sponsor: Institute of Tropical Medicine, Belgium

Brief Summary

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

Not available

Study Timeline

• Study Start: 2012-05
• Study First Submitted: 2012-07-17
• Study First Submitted QC: 2012-08-09
• Study First Posted: 2012-08-13
• Primary Completion: 2013-12
• Study Completion: 2013-12
• Status Verified: 2025-05
• Last Update Submitted: 2025-05-09
• Last Update Posted: 2025-05-11

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 40000

Inclusion Criteria

• All household members volunteering from selected communities

Exclusion Criteria

• Infants less than 2 years

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Topical Repellent & LLIN	Mosquito topical repellent	-

Primary Outcome Measures

Name	Time	Method
Change from baseline in malaria prevalence at 6 months	6 months	Malaria prevalence (PCR detection) will be measured in both study arms at the start and end of the malaria season for 2 consecutive years.

Secondary Outcome Measures

Name	Time	Method
Malaria incidence	6 months	Through passive RDT case detection