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2020-01-17

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cc by (c) Opiyo et al., 2020
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/150451

'We spray and walk away': wall modifications decrease the impact of indoor residual spray campaigns through reductions in post-spray coverage

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http://dx.doi.org/10.1186/s12936-020-3102-6

Abstract

Malaria prevalence has significantly reduced since 2000, largely due to the scale-up of vector control interventions, mainly indoor residual spraying (IRS) and long-lasting insecticide-treated nets (LLINs). Given their success, these tools remain the frontline interventions in the fight against malaria. Their effectiveness relies on three key ingredients: the intervention, the mosquito vector and the end-user. Regarding the intervention, factors such as the insecticide active ingredient(s) used and the durability and/or bio-efficacy of the tool over time are critical. For the vectors, these factors include biting and resting behaviours and the susceptibility to insecticides. Finally, the end-users need to accept and properly use the intervention. Whilst human attitude and behaviour towards LLINs are well-documented both during and after distribution, only initial coverage is monitored for IRS and in a few geographic settings the residual efficacy of the used product. Here, the historical evidence on end-users modifying their wall surfaces post-spraying is presented, a behaviour that has the potential to reduce actual IRS coverage, effectiveness and impact, as fewer people are truly protected. Therefore, clear guidelines on how to monitor IRS acceptability and/or coverage, both before, during and after spraying, are urgently needed as part of the Monitoring and Evaluation of malaria programmes.

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Malària, Insecticides

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Malaria, Insecticides

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Articles publicats en revistes (ISGlobal)

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OPIYO, Mercy A. and PAAIJMANS, Krijn P. 'We spray and walk away': wall modifications decrease the
                impact of indoor residual spray campaigns through reductions in
                post-spray coverage. Malaria Journal. 2020. Vol. 19. ISSN 1475-2875. [consulted: 8 of June of 2026]. Available at: https://hdl.handle.net/2445/150451

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