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Aplicación de formulaciones de Bacillus thuringiensis var. israelensis SH-14 contra Aedes (S) aegypti Application of formulations of Bacillus thuringiensis var. israelensis SH-14 against Aedes (S) aegypti

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Author(s): Uranis Gomes de Assumpção Filho | Wellington da Costa Silva

Journal: Revista Cubana de Medicina Tropical
ISSN 0375-0760

Volume: 56;
Issue: 3;
Start page: 163;
Date: 2004;
Original page

Keywords: Aedes aegypti | control biológico | Bacillus thuringiensis var. israelensis SH-14 | participación comunitaria | Aedes aegypti | biological control | Bacillus thuringiensis var. israelensis SH-14 | community participation

ABSTRACT
Se evaluó la eficacia de 3 formulaciones de Bacillus thuringiensis var. israelensis SH-14: BACTIVEC®, G y WDG en 4 distritos del municipio Nova Iguaçu, Río de Janeiro, Brasil, que poseían altos niveles de infestación de Aedes (S) aegypti (Diptera: Culicidae) y posibilitaban un alto riesgo de transmisión de dengue. Tras el empleo inicial de estos biolarvicidas se realizaron encuestas postratamientos semanales para evaluar su permanencia. La ubicación de ovitrampas en cada distrito permitió detectar el menor índice de positividad en el distrito donde se empleó el Bactivec (c² = 29,40; p= 0,000). Este biolarvicida posibilitó la mayor reducción del índice casa (95,4 %) con una permanencia de 62 d (c² = 35,34; p= 0,000). Se valoró como relevante la participación comunitaria del distrito Botafogo donde fueron obtenidos estos resultados y el menor porcentaje de casas cerradas (Z= 13,11; p= 0,000).The effficacy of 3 formulations of Bacillus thuringiensis var. israelensis SH-14: BACTIVEC; G and WDG was evaluated in 4 districts of the municipality of Nova Iguacu, Rio de Janeiro, Brazil, that had high levels of Aedes (S) aegypti (Diptera: Culicidae) infectation and represented a high risk for dengue transmission. After the inital use of these 3 biolarvicides, weekly postreatment surveys were done to evaluate its permanence. The location of ovitraps in each district allowed to detect the slowest index of positivity in the district where Bactivec was used (x² = 29.40; p= 0.000). This biolarvicide made possible the highest reduction of the house index (95.4 %) with a permanence of 62 days (x² = 35.34, p= 0.000). The participation of the community of Botafogo district, where these results and the slowest percentage of closed houses (Z= 13.11; p= 0.000) were obtained, was significant.
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