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      Eficacia de los tratamientos intradomiciliarios con cipermetrina, lambdacialotrina y clorpirifos en el control de Aedes aegypti en Ciudad de La Habana Translated title: Efficacy of indoor treatment with cypermethrin, lambda-cyhalothrin and chlorpiriphos for the regulation of Aedes aegypti in the City of Havana

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          Abstract

          INTRODUCCIÓN: en las epidemias o brotes de dengue los plaguicidas químicos desempeñan un papel fundamental para controlar los mosquitos adultos transmisores de la enfermedad y como sostén del Programa de control del vector en Cuba. OBJETIVO: conocer la efectividad y la eficiencia de las formulaciones de insecticidas en uso en el control del mosquito Aedes aegypti en 3 cepas de Ciudad de La Habana. MÉTODOS: los bioensayos se realizaron de acuerdo con la metodología de la Organización Mundial de la Salud. Se comparó la eficacia y eficiencia con los insecticidas estudiados entre los tratamientos de nebulización en frío y los de termonebulización. Se aplicó una prueba de normalidad para verificar la naturaleza de cada una de las variables, un ANOVA trifactorial para conocer si existía diferencia entre las medias de las mortalidades y una prueba de Kruskal Wallis para conocer si había diferencia entre los valores de mortalidad para cada tipo de tratamiento con respecto al valor de preparación de 1 L de mezcla (eficiencia), para un nivel de significación de p< 0,05. RESULTADOS: al comparar las mortalidades obtenidas con ambos tipos de tratamiento, se demostró que existe una diferencia altamente significativa entre ellos a favor de los tratamientos de termonebulización, lo que demuestra la eficacia de estos últimos y su eficiencia (efectividad/costo). CONCLUSIONES: se demostró que existe una diferencia altamente significativa entre las formulaciones a favor del galgotrin 25 EC.

          Translated abstract

          INTRODUCTION: in dengue outbreaks or epidemics, the chemical pesticides play a fundamental role to control disease-borne adult mosquitoes and to support the Vector Control program in Cuba. OBJECTIVE: to find out the effectiveness and the efficiency of insecticidal formulations in use for the control of Aedes aegypti mosquito in three strains from the City of Havana. METHODS: bioassays followed the methodology recommended by the World Health Organization. Efficacy and efficiency were compared in the studied insecticides between the cold spraying and the thermal spraying. A standardization test was applied to verify the nature of each variable; one three-factor ANOVA to see any differences among the mortality means and the Kruskal-Wallis test to find out difference among the mortality values for each type of treatment with respect to the preparation of one liter of mixture (efficiency), for a significance level of p< 0,05. RESULTS: When comparing the mortality figures reached with both types of treatment, it was evinced that there was a highly significant difference between them, the most favourable results corresponded to thermal spraying, which proved the efficacy of this treatment and its efficiency (effectiveness/cost). CONCLUSIONS: there exists a highly significant difference between the formulations, which favors Galgothrin 25 EC.

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          Evaluation of the efficacy of lambda-cyhalothrin applied by three spray application methods for emergency control of Aedes aegypti in Costa Rica.

          An extended duration formulation of lambda-cyhalothrin (Icon CS) applied as either an ultra-low volume (ULV) or thermal fog spray from a new hand-held sprayer (Twin-Fog) or as a low-volume spray (LV) from a backpack mist blower against Aedes aegypti was evaluated in Costa Rica. Spray applications were made at the front door for 1 min or to each room for 15 sec for the ULV and LV, and thermal fog applications were made to houses in separate blocks for each treatment. The efficacy and duration of effectiveness of the spray was determined from sentinel caged mosquito mortality and mosquito collections from within houses using hand-held, battery-powered aspirators. Sentinel caged mosquito mortality in both open and sequestered locations was 97-100% for the ULV and thermal fog spray treatments, with control mortality less than 2%. Both ULV applications (front door and each room) provided 3 wk of significant control (P < 0.05) based on adult Ae. aegypti house collections.
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            Evaluation of the efficacy of lambda-cyhalothrin applied as ultra-low volume and thermal fog for emergency control of Aedes aegypti in Honduras.

            An extended-duration formulation of lambda-cyhalothrin (Demand CS) applied as either an ultra-low volume (ULV) or thermal fog spray from a new handheld sprayer (Terrier) against Aedes aegypti was evaluated in Honduras. Spray applications were made at the front door for 1 min or to each room for 15 sec, both for the ULV and thermal fog applications to houses in separate blocks for each treatment. The efficacy and duration of effectiveness of the spray was determined from sentinel caged mosquito mortality and collection of mosquitoes within houses with a backpack power aspirator. Sentinel caged mosquito mortality in both open and sequestered locations was 97-100% for all spray treatments, with control mortality less than 2%. Both ULV applications (front door and each room) provided 4 wk of significant control (P < 0.01) based on adult Ae. aegypti house collections.
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              Niveles de susceptibilidad de una cepa de Aedes aegypti procedente de Santiago de Cuba ante los insecticidas lambdacialotrina, cipermetrina y clorpirifos

              Se determinó el nivel de susceptibilidad y/o resistencia en larvas y adultos de una cepa de Aedes aegypti (L) colectada en el municipio Santiago de Cuba, ante los insecticidas lambdacialotrina, clorpirifos y cipermetrina. Los resultados demostraron que en el estadio larval la cepa en estudio mostró ser susceptible ante los insecticidas lambdacialotrina (FR90= 2,1) clorpirifos (FR90= 1,3) y cipermetrina (FR90= 3,3), mientras que en el estadio adulto mostró ser moderadamente resistente para los insecticidas lambdacialotrina (FR90= 8,6) y cipermetrina (FR90= 7,2) y ante el insecticida clorpirifos se comportó susceptible (FR90= 4,47).
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                mtr
                Revista Cubana de Medicina Tropical
                Rev Cubana Med Trop
                Centro Nacional de Información de Ciencias Médicas (Ciudad de la Habana )
                1561-3054
                December 2010
                : 62
                : 3
                : 230-236
                Affiliations
                [1 ] Universidade Estadual de Maringá Brazil
                [2 ] Unidad Provincial de Vigilancia y Lucha Antivectorial Cuba
                Article
                S0375-07602010000300011
                cc6a4dff-6fa0-40d0-874b-030e54413525

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Cuba

                Self URI (journal page): http://scielo.sld.cu/scielo.php?script=sci_serial&pid=0375-0760&lng=en
                Categories
                TROPICAL MEDICINE

                Infectious disease & Microbiology
                insecticide efficacy,Aedes aegypti,adult,Cuba,eficacia a insecticidas,adulto

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