The impact of indoor residual spraying of deltamethrin on dengue vector populations in the Peruvian Amazon

Show simple item record Paredes Esquivel, Claudia Caterina Lenhart, Audrey Del Río, Ricardo Leza Salord, María del Mar Estrugo, M. Chalco, Enrique Cassanova, Wilma Miranda Chueca, Miguel Ángel 2019-01-08T12:34:01Z
dc.description.abstract [eng] Dengue is an important public health problem in the Amazon area of Peru, resulting in significant morbidity each year. As in other areas of the world, ultra-low volume (ULV) application of insecticides is the main strategy to reduce adult populations of the dengue vector Aedes aegypti, despite growing evidence of its limitations as a single control method. This study investigated the efficacy of deltamethrin S.C. applied through indoor residual spraying (IRS) of dwellings in reducing A. aegypti populations. The residual effect of the insecticide was tested by monthly bioassays on the three most common indoor surfaces found in the Amazon area: painted wood, unpainted wood and brick. The results showed that in an area with moderate levels of A. aegypti infestation, IRS dramatically reduced all immature indices the first week after deltamethrin IRS application and the adult index from 18.5 to 3.1, four weeks after intervention (p < 0.05). Even though housing conditions facilitated reinfestation with A. aegypti (100% of the houses have open roof eaves, 31.5% lack sewage systems, and 60.4% collected rain in open containers), indices remained low compared to baseline 16 weeks after insecticide application. Bioassays showed that deltamethrin S.C. caused mortalities >80% 8 weeks after application on all types of surfaces. The residual effect of the insecticide was greater on brick than on wooden walls (p < 0.05). Our results demonstrate that IRS can have both an immediate and sustained effect on reducing adult and immature A. aegypti populations and should be considered as an adult mosquito control strategy by dengue vector control programs
dc.format application/pdf
dc.relation.isformatof Versió postprint del document publicat a:
dc.relation.ispartof Acta Tropica, 2015, vol. 154, p. 139-144
dc.subject.classification 59 - Zoologia
dc.subject.other 59 - Zoology
dc.title The impact of indoor residual spraying of deltamethrin on dengue vector populations in the Peruvian Amazon
dc.type info:eu-repo/semantics/article
dc.type info:eu-repo/semantics/acceptedVersion 2019-01-08T12:34:02Z info:eu-repo/date/embargoEnd/2075-01-01
dc.embargo 2075-01-01
dc.subject.keywords Virus Dengue
dc.subject.keywords Mosquitos
dc.subject.keywords control de vectores
dc.rights.accessRights info:eu-repo/semantics/embargoedAccess

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