Six years of experience in entomological surveillance of indoor residual spraying against malaria transmission in Benin: lessons learned, challenges and outlooks

Malaria Journal

Research

Raymond Beach¹  Fiacre R. Agossa²  Gil G. Padonou²  Martin C. Akogbéto²  Rock Y. Aïkpon²  Roseric Azondékon³  Razaki A. Ossè⁴  Michel Sèzonlin⁵ 

[1] Center of Disease Control, Atlanta, USA;Centre de Recherche Entomologique de Cotonou (CREC), 06 BP 2604, Cotonou, Bénin;Faculté des Sciences et Techniques, Université d’Abomey Calavi, Cotonou, Bénin;Centre de Recherche Entomologique de Cotonou (CREC), 06 BP 2604, Cotonou, Bénin;Université du Massachusetts Amherst, Amherst, MA, USA;Centre de Recherche Entomologique de Cotonou (CREC), 06 BP 2604, Cotonou, Bénin;Université d’Agriculture de Kétou, Kétou, Benin;Faculté des Sciences et Techniques, Université d’Abomey Calavi, Cotonou, Bénin;

关键词: Indoor residual spraying;    Lessons learned;    Benin;   

DOI  :  10.1186/s12936-015-0757-5

 received in 2015-01-26, accepted in 2015-06-02,  发布年份 2015

来源: Springer

【 摘 要 】

BackgroundFrom 2008 to 2013, a prevention intervention against malaria based on indoor residual spraying (IRS) was implemented in Benin. From 2008 to 2012, Ficam M®, a bendiocarb-containing product was used for house spraying, in association with pirimiphos methyl EC (Actellic EC) in 2013. This operation aimed to strengthen the effectiveness of treated nets so as to expedite the achievement of Millennium Development Goals (MDGs): the reduction of morbidity and mortality due to malaria by 75 % from 2000 to 2015.MethodsMonitoring and evaluation (M&E) was implemented in order to evaluate the impact of IRS intervention on malaria transmission. Anopheles gambiae s.l. populations were sampled by human landing catch. In addition, window exit traps and pyrethrum spray catches were performed to assess exophagic behaviour of Anopheles vectors the main malaria vector in the treated areas. The residual activity of insecticide in the treated walls was also assessed using WHO bioassay test.ResultsThe purpose of this project was to draw attention to new challenges and future prospects for the success of IRS in Benin. The main strength of the intervention was a large-scale operation in which more than 80 % of the houses were treated due to the strong adhesion of population. In addition, a significant reduction of the EIR in areas under IRS were observed. However, there were many challenges including the high cost of IRS implementation and the identification of suitable areas to implement IRS. This was because of the low and short residual effect of the insecticides recommended for IRS and the management strategy for vector resistance to insecticides. This indicated that challenges are accompanied by suggested solutions. For the cost of IRS to be accessible to states, then local organizations need to be created in partnership with the National Malaria Control Programme (NMCP) in order to ensure relevant planning and implementation of IRS.ConclusionAs an anticipatory measure against vector resistance, this paper proposes various methods, such as periodic IRS based on a combination of two or three insecticides of different classes used in rotation every two or three years.

【 授权许可】

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© Akogbéto et al. 2015. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.