Semi-field studies to better understand the impact of eave tubes on mosquito mortality and behaviour
Background: Eave tubes are a type of housing modification that provide a novel way of delivering insecticides to mosquitoes as they attempt to enter the house. The current study reports on a series of semi-field studies aimed at improving the understanding of how eave tubes might impact mosquito mortality and behaviour. Methods: Experiments were conducted using West African style experimental huts at a field site in M'be, Côte d'Ivoire. Huts were modified in various ways to determine: (i) whether mosquitoes in this field setting naturally recruit to eave tubes; (ii) whether eave tubes can reduce house entry even in the absence of screening; (iii) whether mosquitoes suffer mortality if they attempt to exit a house via treated eave tubes; and, (iv) whether screening and eave tubes might deflect mosquitoes into neighbouring houses without the intervention. Results: Ninety percent more mosquitoes (Anopheles gambiae sensu lato, and other species) entered huts through open eaves tubes compared to window slits. The addition of insecticide-treated eave tubes reduced mosquito entry by 60%, even when windows remained open. Those mosquitoes that managed to enter the huts exhibited a 64% reduction in blood feeding and a tendency for increased mortality, suggesting contact with insecticide-treated inserts prior to hut entry. When An. gambiae mosquitoes were deliberately introduced into huts with treated eave tubes, there was evidence of six times increase in overnight mortality, suggesting mosquitoes can contact treated eave tube inserts when trying to exit the hut. There was no evidence for deflection of mosquitoes from huts with screening, or screening plus eave tubes, to adjacent unmodified huts. Conclusions: Eave tubes are a potentially effective way to target Anopheles mosquitoes with insecticides. That treated eave tubes can reduce mosquito entry even when windows are open is a potentially important result as it suggests that eave tubes might not need to be combined with household screening to have an impact on malaria transmission. The absence of deflection is also a potentially important result as coverage of eave tubes and/or screening is unlikely to be 100% and it is important that households that do not have the technology are not disadvantaged by those that do.
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Format: | article biblioteca |
Language: | eng |
Subjects: | Anopheles gambiae, malaria, insecticide, mortalité, épidémiologie, déflexion, vecteur de maladie, http://aims.fao.org/aos/agrovoc/c_30508, http://aims.fao.org/aos/agrovoc/c_34312, http://aims.fao.org/aos/agrovoc/c_3887, http://aims.fao.org/aos/agrovoc/c_4945, http://aims.fao.org/aos/agrovoc/c_2615, http://aims.fao.org/aos/agrovoc/c_672ec3a8, http://aims.fao.org/aos/agrovoc/c_8164, http://aims.fao.org/aos/agrovoc/c_4027, |
Online Access: | http://agritrop.cirad.fr/609723/ http://agritrop.cirad.fr/609723/1/s12936-018-2457-4.pdf |
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dig-cirad-fr-6097232024-06-25T04:32:21Z http://agritrop.cirad.fr/609723/ http://agritrop.cirad.fr/609723/ Semi-field studies to better understand the impact of eave tubes on mosquito mortality and behaviour. Barreaux Antoine, Brou N'Guessan, Koffi Alphonsine A., N'Guessan Raphaël, Oumbouke Welbeck A., Tia Innocent Zran, Thomas Matthew B.. 2018. Malaria Journal, 17:306, 10 p.https://doi.org/10.1186/s12936-018-2457-4 <https://doi.org/10.1186/s12936-018-2457-4> Semi-field studies to better understand the impact of eave tubes on mosquito mortality and behaviour Barreaux, Antoine Brou, N'Guessan Koffi, Alphonsine A. N'Guessan, Raphaël Oumbouke, Welbeck A. Tia, Innocent Zran Thomas, Matthew B. eng 2018 Malaria Journal Anopheles gambiae malaria insecticide mortalité épidémiologie déflexion vecteur de maladie http://aims.fao.org/aos/agrovoc/c_30508 http://aims.fao.org/aos/agrovoc/c_34312 http://aims.fao.org/aos/agrovoc/c_3887 http://aims.fao.org/aos/agrovoc/c_4945 http://aims.fao.org/aos/agrovoc/c_2615 http://aims.fao.org/aos/agrovoc/c_672ec3a8 http://aims.fao.org/aos/agrovoc/c_8164 Côte d'Ivoire http://aims.fao.org/aos/agrovoc/c_4027 Background: Eave tubes are a type of housing modification that provide a novel way of delivering insecticides to mosquitoes as they attempt to enter the house. The current study reports on a series of semi-field studies aimed at improving the understanding of how eave tubes might impact mosquito mortality and behaviour. Methods: Experiments were conducted using West African style experimental huts at a field site in M'be, Côte d'Ivoire. Huts were modified in various ways to determine: (i) whether mosquitoes in this field setting naturally recruit to eave tubes; (ii) whether eave tubes can reduce house entry even in the absence of screening; (iii) whether mosquitoes suffer mortality if they attempt to exit a house via treated eave tubes; and, (iv) whether screening and eave tubes might deflect mosquitoes into neighbouring houses without the intervention. Results: Ninety percent more mosquitoes (Anopheles gambiae sensu lato, and other species) entered huts through open eaves tubes compared to window slits. The addition of insecticide-treated eave tubes reduced mosquito entry by 60%, even when windows remained open. Those mosquitoes that managed to enter the huts exhibited a 64% reduction in blood feeding and a tendency for increased mortality, suggesting contact with insecticide-treated inserts prior to hut entry. When An. gambiae mosquitoes were deliberately introduced into huts with treated eave tubes, there was evidence of six times increase in overnight mortality, suggesting mosquitoes can contact treated eave tube inserts when trying to exit the hut. There was no evidence for deflection of mosquitoes from huts with screening, or screening plus eave tubes, to adjacent unmodified huts. Conclusions: Eave tubes are a potentially effective way to target Anopheles mosquitoes with insecticides. That treated eave tubes can reduce mosquito entry even when windows are open is a potentially important result as it suggests that eave tubes might not need to be combined with household screening to have an impact on malaria transmission. The absence of deflection is also a potentially important result as coverage of eave tubes and/or screening is unlikely to be 100% and it is important that households that do not have the technology are not disadvantaged by those that do. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/609723/1/s12936-018-2457-4.pdf text cc_by info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ https://doi.org/10.1186/s12936-018-2457-4 10.1186/s12936-018-2457-4 info:eu-repo/semantics/altIdentifier/doi/10.1186/s12936-018-2457-4 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1186/s12936-018-2457-4 |
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Anopheles gambiae malaria insecticide mortalité épidémiologie déflexion vecteur de maladie http://aims.fao.org/aos/agrovoc/c_30508 http://aims.fao.org/aos/agrovoc/c_34312 http://aims.fao.org/aos/agrovoc/c_3887 http://aims.fao.org/aos/agrovoc/c_4945 http://aims.fao.org/aos/agrovoc/c_2615 http://aims.fao.org/aos/agrovoc/c_672ec3a8 http://aims.fao.org/aos/agrovoc/c_8164 http://aims.fao.org/aos/agrovoc/c_4027 Anopheles gambiae malaria insecticide mortalité épidémiologie déflexion vecteur de maladie http://aims.fao.org/aos/agrovoc/c_30508 http://aims.fao.org/aos/agrovoc/c_34312 http://aims.fao.org/aos/agrovoc/c_3887 http://aims.fao.org/aos/agrovoc/c_4945 http://aims.fao.org/aos/agrovoc/c_2615 http://aims.fao.org/aos/agrovoc/c_672ec3a8 http://aims.fao.org/aos/agrovoc/c_8164 http://aims.fao.org/aos/agrovoc/c_4027 |
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Anopheles gambiae malaria insecticide mortalité épidémiologie déflexion vecteur de maladie http://aims.fao.org/aos/agrovoc/c_30508 http://aims.fao.org/aos/agrovoc/c_34312 http://aims.fao.org/aos/agrovoc/c_3887 http://aims.fao.org/aos/agrovoc/c_4945 http://aims.fao.org/aos/agrovoc/c_2615 http://aims.fao.org/aos/agrovoc/c_672ec3a8 http://aims.fao.org/aos/agrovoc/c_8164 http://aims.fao.org/aos/agrovoc/c_4027 Anopheles gambiae malaria insecticide mortalité épidémiologie déflexion vecteur de maladie http://aims.fao.org/aos/agrovoc/c_30508 http://aims.fao.org/aos/agrovoc/c_34312 http://aims.fao.org/aos/agrovoc/c_3887 http://aims.fao.org/aos/agrovoc/c_4945 http://aims.fao.org/aos/agrovoc/c_2615 http://aims.fao.org/aos/agrovoc/c_672ec3a8 http://aims.fao.org/aos/agrovoc/c_8164 http://aims.fao.org/aos/agrovoc/c_4027 Barreaux, Antoine Brou, N'Guessan Koffi, Alphonsine A. N'Guessan, Raphaël Oumbouke, Welbeck A. Tia, Innocent Zran Thomas, Matthew B. Semi-field studies to better understand the impact of eave tubes on mosquito mortality and behaviour |
description |
Background: Eave tubes are a type of housing modification that provide a novel way of delivering insecticides to mosquitoes as they attempt to enter the house. The current study reports on a series of semi-field studies aimed at improving the understanding of how eave tubes might impact mosquito mortality and behaviour. Methods: Experiments were conducted using West African style experimental huts at a field site in M'be, Côte d'Ivoire. Huts were modified in various ways to determine: (i) whether mosquitoes in this field setting naturally recruit to eave tubes; (ii) whether eave tubes can reduce house entry even in the absence of screening; (iii) whether mosquitoes suffer mortality if they attempt to exit a house via treated eave tubes; and, (iv) whether screening and eave tubes might deflect mosquitoes into neighbouring houses without the intervention. Results: Ninety percent more mosquitoes (Anopheles gambiae sensu lato, and other species) entered huts through open eaves tubes compared to window slits. The addition of insecticide-treated eave tubes reduced mosquito entry by 60%, even when windows remained open. Those mosquitoes that managed to enter the huts exhibited a 64% reduction in blood feeding and a tendency for increased mortality, suggesting contact with insecticide-treated inserts prior to hut entry. When An. gambiae mosquitoes were deliberately introduced into huts with treated eave tubes, there was evidence of six times increase in overnight mortality, suggesting mosquitoes can contact treated eave tube inserts when trying to exit the hut. There was no evidence for deflection of mosquitoes from huts with screening, or screening plus eave tubes, to adjacent unmodified huts. Conclusions: Eave tubes are a potentially effective way to target Anopheles mosquitoes with insecticides. That treated eave tubes can reduce mosquito entry even when windows are open is a potentially important result as it suggests that eave tubes might not need to be combined with household screening to have an impact on malaria transmission. The absence of deflection is also a potentially important result as coverage of eave tubes and/or screening is unlikely to be 100% and it is important that households that do not have the technology are not disadvantaged by those that do. |
format |
article |
topic_facet |
Anopheles gambiae malaria insecticide mortalité épidémiologie déflexion vecteur de maladie http://aims.fao.org/aos/agrovoc/c_30508 http://aims.fao.org/aos/agrovoc/c_34312 http://aims.fao.org/aos/agrovoc/c_3887 http://aims.fao.org/aos/agrovoc/c_4945 http://aims.fao.org/aos/agrovoc/c_2615 http://aims.fao.org/aos/agrovoc/c_672ec3a8 http://aims.fao.org/aos/agrovoc/c_8164 http://aims.fao.org/aos/agrovoc/c_4027 |
author |
Barreaux, Antoine Brou, N'Guessan Koffi, Alphonsine A. N'Guessan, Raphaël Oumbouke, Welbeck A. Tia, Innocent Zran Thomas, Matthew B. |
author_facet |
Barreaux, Antoine Brou, N'Guessan Koffi, Alphonsine A. N'Guessan, Raphaël Oumbouke, Welbeck A. Tia, Innocent Zran Thomas, Matthew B. |
author_sort |
Barreaux, Antoine |
title |
Semi-field studies to better understand the impact of eave tubes on mosquito mortality and behaviour |
title_short |
Semi-field studies to better understand the impact of eave tubes on mosquito mortality and behaviour |
title_full |
Semi-field studies to better understand the impact of eave tubes on mosquito mortality and behaviour |
title_fullStr |
Semi-field studies to better understand the impact of eave tubes on mosquito mortality and behaviour |
title_full_unstemmed |
Semi-field studies to better understand the impact of eave tubes on mosquito mortality and behaviour |
title_sort |
semi-field studies to better understand the impact of eave tubes on mosquito mortality and behaviour |
url |
http://agritrop.cirad.fr/609723/ http://agritrop.cirad.fr/609723/1/s12936-018-2457-4.pdf |
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