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Impact of increased ventilation on indoor temperature and malaria mosquito density: an experimental study in The Gambia
In sub-Saharan Africa, cooler houses would increase the coverage of insecticide-treated bednets, the primary malaria control tool. We examined whether improved ventilation, using windows screened with netting, cools houses at night and reduces malaria mosquito house entry in The Gambia. Identical ho...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8113914/ https://www.ncbi.nlm.nih.gov/pubmed/33975463 http://dx.doi.org/10.1098/rsif.2020.1030 |
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author | Jatta, Ebrima Carrasco-Tenezaca, Majo Jawara, Musa Bradley, John Ceesay, Sainey D'Alessandro, Umberto Jeffries, David Kandeh, Balla Lee, Daniel Sang-Hoon Pinder, Margaret Wilson, Anne L. Knudsen, Jakob Lindsay, Steve W. |
author_facet | Jatta, Ebrima Carrasco-Tenezaca, Majo Jawara, Musa Bradley, John Ceesay, Sainey D'Alessandro, Umberto Jeffries, David Kandeh, Balla Lee, Daniel Sang-Hoon Pinder, Margaret Wilson, Anne L. Knudsen, Jakob Lindsay, Steve W. |
author_sort | Jatta, Ebrima |
collection | PubMed |
description | In sub-Saharan Africa, cooler houses would increase the coverage of insecticide-treated bednets, the primary malaria control tool. We examined whether improved ventilation, using windows screened with netting, cools houses at night and reduces malaria mosquito house entry in The Gambia. Identical houses were constructed, with badly fitting doors the only mosquito entry points. Two men slept in each house and mosquitoes captured using light traps. First, temperature and mosquito density were compared in four houses with 0, 1, 2 and 3 screened windows. Second, carbon dioxide (CO(2)), a major mosquito attractant, was measured in houses with (i) no windows, (ii) screened windows and (iii) screened windows and screened doors. Computational fluid dynamic modelling captured the spatial movement of CO(2). Increasing ventilation made houses cooler, more comfortable and reduced malaria mosquito house entry; with three windows reducing mosquito densities by 95% (95%CI = 90–98%). Screened windows and doors reduced the indoor temperature by 0.6°C (95%CI = 0.5–0.7°C), indoor CO(2) concentrations by 31% between 21.00 and 00.00 h and malaria mosquito entry by 76% (95%CI = 69–82%). Modelling shows screening reduces CO(2) plumes from houses. Under our experimental conditions, cross-ventilation not only reduced indoor temperature, but reduced the density of house-entering malaria mosquitoes, by weakening CO(2) plumes emanating from houses. |
format | Online Article Text |
id | pubmed-8113914 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Royal Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-81139142021-05-21 Impact of increased ventilation on indoor temperature and malaria mosquito density: an experimental study in The Gambia Jatta, Ebrima Carrasco-Tenezaca, Majo Jawara, Musa Bradley, John Ceesay, Sainey D'Alessandro, Umberto Jeffries, David Kandeh, Balla Lee, Daniel Sang-Hoon Pinder, Margaret Wilson, Anne L. Knudsen, Jakob Lindsay, Steve W. J R Soc Interface Life Sciences–Engineering interface In sub-Saharan Africa, cooler houses would increase the coverage of insecticide-treated bednets, the primary malaria control tool. We examined whether improved ventilation, using windows screened with netting, cools houses at night and reduces malaria mosquito house entry in The Gambia. Identical houses were constructed, with badly fitting doors the only mosquito entry points. Two men slept in each house and mosquitoes captured using light traps. First, temperature and mosquito density were compared in four houses with 0, 1, 2 and 3 screened windows. Second, carbon dioxide (CO(2)), a major mosquito attractant, was measured in houses with (i) no windows, (ii) screened windows and (iii) screened windows and screened doors. Computational fluid dynamic modelling captured the spatial movement of CO(2). Increasing ventilation made houses cooler, more comfortable and reduced malaria mosquito house entry; with three windows reducing mosquito densities by 95% (95%CI = 90–98%). Screened windows and doors reduced the indoor temperature by 0.6°C (95%CI = 0.5–0.7°C), indoor CO(2) concentrations by 31% between 21.00 and 00.00 h and malaria mosquito entry by 76% (95%CI = 69–82%). Modelling shows screening reduces CO(2) plumes from houses. Under our experimental conditions, cross-ventilation not only reduced indoor temperature, but reduced the density of house-entering malaria mosquitoes, by weakening CO(2) plumes emanating from houses. The Royal Society 2021-05-12 /pmc/articles/PMC8113914/ /pubmed/33975463 http://dx.doi.org/10.1098/rsif.2020.1030 Text en © 2021 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Life Sciences–Engineering interface Jatta, Ebrima Carrasco-Tenezaca, Majo Jawara, Musa Bradley, John Ceesay, Sainey D'Alessandro, Umberto Jeffries, David Kandeh, Balla Lee, Daniel Sang-Hoon Pinder, Margaret Wilson, Anne L. Knudsen, Jakob Lindsay, Steve W. Impact of increased ventilation on indoor temperature and malaria mosquito density: an experimental study in The Gambia |
title | Impact of increased ventilation on indoor temperature and malaria mosquito density: an experimental study in The Gambia |
title_full | Impact of increased ventilation on indoor temperature and malaria mosquito density: an experimental study in The Gambia |
title_fullStr | Impact of increased ventilation on indoor temperature and malaria mosquito density: an experimental study in The Gambia |
title_full_unstemmed | Impact of increased ventilation on indoor temperature and malaria mosquito density: an experimental study in The Gambia |
title_short | Impact of increased ventilation on indoor temperature and malaria mosquito density: an experimental study in The Gambia |
title_sort | impact of increased ventilation on indoor temperature and malaria mosquito density: an experimental study in the gambia |
topic | Life Sciences–Engineering interface |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8113914/ https://www.ncbi.nlm.nih.gov/pubmed/33975463 http://dx.doi.org/10.1098/rsif.2020.1030 |
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