Can insecticide treated window curtains in the household control dengue vectors in the community?

A cluster randomised controlled trial of household-based insecticide treated window curtains for control of the dengue vector Aedes aegypti in the community

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN39952287

Enrollment

2000

Registered

2010-03-25

Start date

2008-03-01

Completion date

Unknown

Last updated

2020-03-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Dengue (including Dengue Haemorrhagic Fever [DHF] and Dengue Shock Syndrome [DSS]) Infections and Infestations Dengue fever [classical dengue]

Interventions

Curtains made from deltamethrin-coated polyester netting (Long Lasting Impregnated netting

PermaNet® Vestergaard-Frandsen, Lausanne, Switzerland), hung in outer windows regardless of the presence or absence of other window coverings (World Health Organization Pesticide Evaluation Scheme [WH

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: All occupied households

Exclusion criteria

Exclusion criteria: 1. Business-only premises 2. Multi-storey buildings

Design outcomes

Primary

Measure	Time frame
Standard larval indices for the Aedes aegypti mosquito: 1. Breteau index: number of containers with immature stages per 100 houses 2. House index: number of houses containing immature stages per 100 houses 3. Container index: number of containers with immature stages per 100 containers with water 4. Pupal surveys were also undertaken to calculate the number of pupae per person index (number of pupae collected/human population in a sector) Follow up surveys were made to all houses at 3, 6, 9 and 12 months post-intervention. Analyses to measure impact of the intervention on dengue vector populations will be undertaken according to intention to treat and per protocol (based on coverage levels recorded in follow-up surveys).	—

Measure

Time frame

Standard larval indices for the Aedes aegypti mosquito: 1. Breteau index: number of containers with immature stages per 100 houses 2. House index: number of houses containing immature stages per 100 houses 3. Container index: number of containers with immature stages per 100 containers with water 4. Pupal surveys were also undertaken to calculate the number of pupae per person index (number of pupae collected/human population in a sector) Follow up surveys were made to all houses at 3, 6, 9 and 12 months post-intervention. Analyses to measure impact of the intervention on dengue vector populations will be undertaken according to intention to treat and per protocol (based on coverage levels recorded in follow-up surveys).

—

Secondary

Measure	Time frame
Interviews used to determine: 1. Household characteristics 2. Previous vector control intervention 3. Better understanding of the local population's knowledge, attitudes and practice about previous methods of dengue prevention and control, and about ITMs for the same purpose 4. Insecticide-susceptibility assays undertaken before and after intervention Each house was also georeferenced with a handheld global positioning system receiver to permit subsequent overspill effects between adjacent treated and control clusters to be quantified.	—

Measure

Time frame

Interviews used to determine: 1. Household characteristics 2. Previous vector control intervention 3. Better understanding of the local population's knowledge, attitudes and practice about previous methods of dengue prevention and control, and about ITMs for the same purpose 4. Insecticide-susceptibility assays undertaken before and after intervention Each house was also georeferenced with a handheld global positioning system receiver to permit subsequent overspill effects between adjacent treated and control clusters to be quantified.

—

Countries

Thailand

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026