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Evaluación de ovitrampas para vigilancia y control de Aedes aegypti en dos centros urbanos del Urabá antioqueño.

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Title: Evaluación de ovitrampas para vigilancia y control de Aedes aegypti en dos centros urbanos del Urabá antioqueño.
Alternate Title: Ovitraps evaluation for surveillance and control of Aedes aegypti in two urban settlements of Urabá, Antioquia.
Authors: Alarcón, Érika Patricia1, Segura, Ángela María2, Rúa-Uribe, Guillermo3, Parra-Henao, Gabriel1,2 gparra@ces.edu.co
Source: Biomédica: Revista del Instituto Nacional de Salud. sep2014, Vol. 34 Issue 3, p409-424. 16p.
Abstract (English): Introduction: Aedes (Stegomyia) aegypti is the main vector of dengue. Chemical insecticides have been used to control the mosquito and it has developed resistance. It is necessary to evaluate alternative strategies that are efficient, economical and easy to apply, such as ovitraps with Bacillus thuringiesis israeliensis. Objective: To evaluate the impact of ovitraps loaded with B. t. israeliensis on traditional indexes, as strategies for surveillance and control of A. aegypti. Materials and methods: We selected eight neighborhoods from the municipalities of Apartadó and Carepa. Two neighborhoods in each municipality were chosen for intervention and two for control. The intervention consisted in the installation of ovitraps with B. t. israeliensis in every house. The traps were visited each month between September, 2009, and March, 2010. Traditional indexes were obtained and compared among the neighborhoods. Ovitrap positivity index and egg density index were calculated and we generated density maps. Results: Five hundred and nineteen ovitraps were placed monthly; 3,114 samples were obtained, from which 76.4% were positive. We collected 501,425 eggs. In Apartadó, statistically significant differences were observed in the house, container and Breteau indexes. The ovitrap positivity index showed high risk of A. aegypti infestation and traditional indexes showed medium and low risk levels. Conclusions: Ovitraps had an impact on traditional indexes and proved to be useful strategies for surveillance and control of A. aegypti in Urabá, Antioquia. [ABSTRACT FROM AUTHOR]
Abstract (Spanish): Introducción. Aedes (Stegomyia) aegypti es el principal vector del dengue. En el control del mosquito se han usado insecticidas químicos contra los cuales ha desarrollado resistencia. Es necesaria la evaluación de estrategias alternativas que sean eficientes, económicas y de fácil aplicación, como las ovitrampas con Bacillus thuringiesis var. israeliensis. Objetivo. Evaluar el impacto de ovitrampas con B. thuringiesis var. israeliensis sobre los índices aédicos tradicionales, como estrategia para la vigilancia y el control de A. aegypti. Materiales y métodos. Se seleccionaron ocho barrios de los municipios de Apartadó y Carepa, Antioquia, de los cuales se escogieron dos barrios para la intervención y dos para el control en cada municipio. La intervención consistió en la instalación de una ovitrampa con B. thuringiesis var. israeliensis en cada una de las viviendas. Las ovitrampas se visitaron mensualmente entre septiembre de 2009 y marzo de 2010. Se obtuvieron los índices aédicos tradicionales y se hicieron comparaciones entre los barrios. Se calculó el índice de ovitrampas positivas y el de densidad de huevos, y se generaron los mapas de densidad. Resultados. Se colocaron 519 ovitrampas muestreadas mensualmente. Se hicieron 3.114 muestreos, con un porcentaje de registros positivos de 76,4%. Se recolectaron 501.425 huevos. En Apartadó se observaron diferencias significativas entre el índice de infestación de viviendas, el índice de infestación de depósitos y el índice de Breteau en los barrios intervenidos comparados con los barrios de control. El índice de ovitrampas positivas evidenció un alto riesgo de infestación por A. aegypti y, los índices tradicionales, niveles de riesgo medio y bajo. Conclusiones. Las ovitrampas tuvieron impacto sobre los índices tradicionales y demostraron ser estrategias útiles en la vigilancia de A. aegypti en el Urabá antioqueño. [ABSTRACT FROM AUTHOR]
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Database: MedicLatina
Description
Abstract:Introduction: Aedes (Stegomyia) aegypti is the main vector of dengue. Chemical insecticides have been used to control the mosquito and it has developed resistance. It is necessary to evaluate alternative strategies that are efficient, economical and easy to apply, such as ovitraps with Bacillus thuringiesis israeliensis. Objective: To evaluate the impact of ovitraps loaded with B. t. israeliensis on traditional indexes, as strategies for surveillance and control of A. aegypti. Materials and methods: We selected eight neighborhoods from the municipalities of Apartadó and Carepa. Two neighborhoods in each municipality were chosen for intervention and two for control. The intervention consisted in the installation of ovitraps with B. t. israeliensis in every house. The traps were visited each month between September, 2009, and March, 2010. Traditional indexes were obtained and compared among the neighborhoods. Ovitrap positivity index and egg density index were calculated and we generated density maps. Results: Five hundred and nineteen ovitraps were placed monthly; 3,114 samples were obtained, from which 76.4% were positive. We collected 501,425 eggs. In Apartadó, statistically significant differences were observed in the house, container and Breteau indexes. The ovitrap positivity index showed high risk of A. aegypti infestation and traditional indexes showed medium and low risk levels. Conclusions: Ovitraps had an impact on traditional indexes and proved to be useful strategies for surveillance and control of A. aegypti in Urabá, Antioquia. [ABSTRACT FROM AUTHOR]
ISSN:01204157
DOI:10.7705/biomedica.v34i3.2134