Ecohealth interventions limit triatomine reinfestation following insecticide spraying in La Brea, Guatemala

In this study, we evaluate the effect of participatory Ecohealth interventions on domestic reinfestation of the Chagas disease vector Triatoma dimidiata after village-wide suppression of the vector population using a residual insecticide. The study was conducted in the rural community of La Brea, Gu...

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Bibliographic Details
Published in:The American journal of tropical medicine and hygiene 2013-04, Vol.88 (4), p.630-637
Main Authors: Lucero, David E, Morrissey, Leslie A, Rizzo, Donna M, Rodas, Antonieta, Garnica, Roberto, Stevens, Lori, Bustamante, Dulce M, Monroy, Maria Carlota
Format: Article
Language:English
Subjects:
Animals
Chagas Disease - prevention & control
Chagas Disease - transmission
Ectoparasitic Infestations - prevention & control
Ectoparasitic Infestations - transmission
Guatemala
Humans
Insect Control - methods
Insect Vectors - growth & development
Insect Vectors - parasitology
Insecticides
National Health Programs
Population Density
Program Evaluation - methods
Rural Population
Socioeconomic Factors
Triatoma
Triatoma dimidiata
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Summary:In this study, we evaluate the effect of participatory Ecohealth interventions on domestic reinfestation of the Chagas disease vector Triatoma dimidiata after village-wide suppression of the vector population using a residual insecticide. The study was conducted in the rural community of La Brea, Guatemala between 2002 and 2009 where vector infestation was analyzed within a spatial data framework based on entomological and socio-economic surveys of homesteads within the village. Participatory interventions focused on community awareness and low-cost home improvements using local materials to limit areas of refuge and alternative blood meals for the vector within the home, and potential shelter for the vector outside the home. As a result, domestic infestation was maintained at ≤ 3% and peridomestic infestation at ≤ 2% for 5 years beyond the last insecticide spraying, in sharp contrast to the rapid reinfestation experienced in earlier insecticide only interventions.
ISSN:0002-9637
1476-1645
DOI:10.4269/ajtmh.12-0448