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Am J Trop Med Hyg. 2018 Oct 22. doi: 10.4269/ajtmh.18-0660. [Epub ahead of print]

New Prototype Screened Doors and Windows for Excluding Mosquitoes from Houses: A Pilot Study in Rural Gambia.

Author information

1
Medical Research Council Unit, The Gambia, London School of Hygiene and Tropical Medicine, Fajara, The Gambia.
2
National Malaria Control Programme, Banjul, The Gambia.
3
Intellectual Ventures Global Good Fund, Bellevue, Washington.
4
Australian Institute of Tropical Health and Medicine, James Cook University, Cairns, Australia.
5
Department of Infectious Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom.
6
Nuffield Department of Medicine, Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, United Kingdom.
7
KEMRI-Wellcome Trust Research Programme, Kilifi, Kenya.
8
The Royal Danish Academy of Fine Arts, School of Architecture, Design and Conservation, The School of Architecture, Copenhagen, Denmark.

Abstract

Despite compelling evidence that modern housing protects against malaria, houses in endemic areas are still commonly porous to mosquitoes. The protective efficacy of four prototype screened doors and two windows designs against mosquito house entry, their impact on indoor climate, as well as their use, durability and acceptability was assessed in a Gambian village. A baseline survey collected data on all the houses and discrete household units, each consisting of a front and back room, were selected and randomly allocated to the study arms. Each prototype self-closing screened door and window was installed in six and 12 units, respectively, with six unaltered units serving as controls. All prototype doors reduced the number of house-entering mosquitoes by 59-77% in comparison with the control houses. The indoor climate of houses with screened doors was similar to control houses. Seventy-nine percentage of door openings at night occurred from dusk to midnight, when malaria vectors begin entering houses. Ten weeks after installation the doors and windows were in good condition, although 38% of doors did not fully self-close and latch (snap shut). The new doors and windows were popular with residents. The prototype door with perforated concertinaed screening was the best performing door because it reduced mosquito entry, remained fully functional, and was preferred by the villagers. Screened doors and windows may be useful tools for reducing vector exposure and keeping areas malaria-free after elimination, when investment in routine vector control becomes difficult to maintain.

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