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Bebederos de animales: depósitos a tener en cuenta por el Programa de Control de Aedes aegypti en áreas urbanas de Ciudad de La Habana, Cuba Drinking troughs for animals: containers that should be taken into account for the Aedes aegypti Control Program in urban areas of the City of Havana, Cuba
María del Carmen Marquetti,Juan Bisset,Silvia Suárez,Omayda Pérez
Revista Cubana de Medicina Tropical , 2006,
Abstract: Se hizo un estudio de la influencia de los bebederos de animales en la infestación de Aedes aegypti en el área urbana del municipio Playa. En total se revisaron 700, reportándose 5 (0,71 %) positivos al vector del dengue, correspondiendo su totalidad a bebederos de perros. Se detectaron 32 pupas para un promedio de 6,4 por bebedero. No se encontraron diferencias significativas de la productividad pupal en los distintos depósitos positivos a Aedes aegypti durante el estudio (p> 0,05). Los bebederos se caracterizaron por estar preferiblemente a la sombra, en los patios de las viviendas y contenían abundante materia orgánica. Se resaltó la importancia de estos para el programa de control del vector, por las características de su ubicación que favorece la oviposición de las hembras, por no ser objetos de recambio diario de agua por la población y por su potenciabilidad de aportar adultos de gran talla, factor importante en la transmisión del virus del dengue. A study of the effect of drinking troughs for animals over the infestation by Aedes aegypti in the urban area of Playa municipality was performed. Seven hundred drinking troughs were checked, but only 5 (0.71%) were positive to dengue vector. These five corresponded to drinking containers for dogs. Thirty two pupas were detected for an average of 6.4 per trough. There were no significant differences in pupal productivity among the drinking troughs positive to Aedes aegypti (p>0.05). The drinking troughs were mainly placed at shadowed sites, in the backyard of houses, and characterized by having abundant organic matter. This study underlined the importance of these drinking containers for the dengue vector control program because their above-mentioned location favors egg-laying by female insects, their water content is not daily changed by the population as it1. should be done, and because they can potentially provide large-sized adult vectors, which are an important factor in the transmission of the dengue virus.
Bebederos de animales: depósitos a tener en cuenta por el Programa de Control de Aedes aegypti en áreas urbanas de Ciudad de La Habana, Cuba
Marquetti,María del Carmen; Bisset,Juan; Suárez,Silvia; Pérez,Omayda; Leyva,Maureen;
Revista Cubana de Medicina Tropical , 2006,
Abstract: a study of the effect of drinking troughs for animals over the infestation by aedes aegypti in the urban area of playa municipality was performed. seven hundred drinking troughs were checked, but only 5 (0.71%) were positive to dengue vector. these five corresponded to drinking containers for dogs. thirty two pupas were detected for an average of 6.4 per trough. there were no significant differences in pupal productivity among the drinking troughs positive to aedes aegypti (p>0.05). the drinking troughs were mainly placed at shadowed sites, in the backyard of houses, and characterized by having abundant organic matter. this study underlined the importance of these drinking containers for the dengue vector control program because their above-mentioned location favors egg-laying by female insects, their water content is not daily changed by the population as it1. should be done, and because they can potentially provide large-sized adult vectors, which are an important factor in the transmission of the dengue virus.
Distribución y talla del adulto de Aedes aegypti asociado con los sitios de cría Distribution and size of adult Aedes aegypti associated with the breeding sites  [cached]
Juan Bisset,. María del Carmen Marquetti,Maureen Leyva,Magdalena Rodríguez
Revista Cubana de Medicina Tropical , 2008,
Abstract: INTRODUCCIóN: Hoy día se realizan estudios ecológicos con el fin de buscar nuevas estrategias para el control de Aedes aegypti. OBJETIVOS: agrupar los sitios de cría de Ae. aegypti en categorías y determinar el factor de riesgo de estas, establecer la talla de las hembras provenientes de pupas colectadas en el terreno, y conocer sobre la distribución del vector. MéTODOS: el trabajo se desarrolló en el municipio Playa. Se realizó la inspección de los locales y recipientes de donde se extrajeron las pupas para determinar la talla de las hembras emergidas. RESULTADOS: se clasificaron los depósitos en 5 categorías: depósitos de almacenamiento de agua, depósitos artificiales abandonados en los patios, bebederos de animales, criaderos naturales y gomas. Se revisaron 2 506 locales, de los cuales 57 (2,27 %) resultaron positivos al mosquito para un índice casa de 2,27, un índice de recipiente de 0,53 e índice de Breteau de 2,79. Los mayores valores promedio de longitud del ala de un total de 332 hembras y los mayores valores de factor de riesgo se encontraron en bebederos de animales y gomas con (3,07 ± 0,104 y 3,31 ± 0,95 mm) para un promedio de 2,95 ± 0,25 mm y 2,15 y 5,31, respectivamente. No se encontró diferencia significativa (ANOVA test p= 0,09) al compararse los valores de longitud del ala procedentes de las diferentes categorías de depósitos. CONCLUSIONES: las hembras de Aedes aegypti mostraron variabilidad en su talla. Se encontró este vector distribuido en toda el área estudiada. INTRODUCTION: At present, environmental studies are conducted to find new strategies for the control of Aedes aegypti. OBJECTIVES: To classify Aedes aegypti breeding sites into various categories and to determine their risk factors; to determine the size of females from pupas collected in situ and to learn about the vector distribution. METHODS: this research work was carried out in Playa municipality. All the premises and water containers were inspected from where the pupas were taken to determine the size of emerged females. RESULTS: Containers were classified into 5 categories: water storage containers, artificial containers left in house yards, troughs for animals, natural breeding sites and tyres. Two thousand five hundred and six premises were visited and inspected and 57 of them (2.27 %) were positive to the mosquito for a index per house of 2.27; a container index of 0.53 and Breteau′s index of 2.79. The highest average measures in wing length of 332 females and the highest risk factor values were found in troughs for animals and tyres (3.07 ± 0.104 y 3.31 ± 0.95 mm)
Factores de riesgo de infestación pupal con Aedes aegypti dependientes de la comunidad en un municipio de Ciudad de La Habana Risk factors of pupal infestation with community-based Aedes aegypti in a municipality of Havana City  [cached]
María del Carmen Marquetti,Juan Bisset,Reina Portillo,Magdalena Rodríguez
Revista Cubana de Medicina Tropical , 2007,
Abstract: Se identificaron los factores de riesgo de infestación pupal de Aedes aegypti dependientes de la comunidad en 4 áreas de salud del municipio Playa, ubicado en la zona urbana de Ciudad de La Habana. Los depósitos de mayor positividad al vector del dengue correspondieron a los depósitos artificiales y tanques bajos. Se comprobó que 99,03 % de los locales visitados contenían al menos un depósito con agua, y que las 4 áreas presentaron un comportamiento muy similar en la proporción de tanques por locales, porque en todas la frecuencia de agua fue en días alternos, por lo que la diferencia en la positividad se debió a otros factores no ligados al abasto de este líquido. De los depósitos positivos, 87,17 % se ubicó en los patios de los locales y 91,3 % de los tanques bajos positivos se halló sin tapas o parcialmente tapados. Se encontró que en la positividad de los depósitos al vector del dengue solo 8,7 % no depende de la población, por lo que de existir una participación activa de la comunidad dirigida al tapado de los tanques, el recambio de agua en los bebederos de animales y un buen saneamiento de los patios, se hubiera reducido drásticamente la infestación pupal por Ae. aegypti en las áreas estudiadas. The risk factors of pupal infestation with community-based Aedes aegypti were identified in four areas of Playa municipality, located in the urban zone of Havana City. The deposits with the highest positivity to the vector were the artificial ones and the low tanks. It was confirmed that 99.03 % of the sites visited contained at least one deposit with water, and that 4 areas presented a very similar behaviour in ratio of tanks per site, since in all of them the water was supplied every other day. That is why the difference in the positivity was not due to factors related to the water supply. Of the positive deposits, 87.17 % were located in backyards, and 91.3 % of the positive low tanks had no cover, or were partially covered. It was found that in the positivity of the deposits to the dengue vector, only 8.7 % were non-community dependent. If there had had an active participation of the community directed to cover the tanks, to change the water in the water troughs, and to clean the backyards, the pupal infestation due to Aedes aegypti would have drastically increased in the studied areas.
Diversidade de criadouros e tipos de imóveis freqüentados por Aedes albopictus e Aedes aegypti
Silva,Vanderlei C da; Scherer,Paulo O; Falc?o,Simone S; Alencar,Jeronimo; Cunha,Sergio P; Rodrigues,Iram M; Pinheiro,Nadja L;
Revista de Saúde Pública , 2006, DOI: 10.1590/S0034-89102006000700021
Abstract: objective: to assess the diversity of oviposition containers and buildings where females of aedes albopictus and aedes aegypti can be found. methods: a study was carried out in the city of rio de janeiro, southern brazil, between 2002 and 2003. larvae in different types of buildings were investigated, and immature forms found were then sent to the laboratory for identification. the larval frequency for both mosquitoes was estimated in the oviposition containers available. the breteau index and the building infestation index were calculated and differences were tested using the chi-square test. results: the types of buildings that were positive for aedes albopictus and aedes aegypti were: dwellings (83.9%); churches, schools, clubs (6.8%); vacant land (6.4%); and businesses (2.8%). of 9,153 larvae collected, 12.0% were aedes albopictus and 88.0% were aedes aegypti. aedes albopictus were mostly found in drains (25.4%); cans, bottles, empty bottles (23.9%); and plant vases (16.2%). aedes aegypti was much more frequently found than aedes albopictus (c2=145.067; p<0.001). both species were significantly more frequent in artificial than in natural oviposition containers (c2=31.46; p<0.001). the building infestation index and breteau index for aedes albopictus were 0.3% and 0.28% in 2002 and 0.4% and 0.5 in 2003, respectively. for aedes aegypti, they were 1.0%, 1.16 in 2002 and 3.5% and 4.35 in 2003, respectively. conclusions: the present study assessed the frequencies of aedes albopictus and aedes aegypti females in various types of oviposition containers and types of buildings. the abundant availability of artificial containers in dwellings, associated with the capacity of ae. albopictus to be also found in natural oviposition containers, has greatly contributed for their gradual adaptation to human environment.
Comparación de 2 poblaciones de mosquitos Aedes aegypti de Santiago de Cuba con diferente conducta de reposo
Bisset,Juan A; Rodríguez,Magdalena; De Armas,Yaxsier;
Revista Cubana de Medicina Tropical , 2005,
Abstract: comparison of 2 populations of aedes aegypti mosquitoes from santiago de cuba with different rest conduct
Nota sobre o encontro de Aedes aegypti em bromélias  [cached]
Forattini Oswaldo Paulo,Marques Gisela Rita Alvarenga Monteiro
Revista de Saúde Pública , 2000,
Abstract: Descreve-se o encontro de formas imaturas de Aedes aegypti em bromélia domesticada para fins decorativos. S o feitas considera es sobre as implica es desse encontro para o controle desse mosquito.
Comportamiento estacional y temporal de Aedes aegypti y Aedes albopictus en La Habana, Cuba Seasonal and spatial behaviour of Aedes aegypti and Aedes albopictus in the City of Havana, Cuba  [cached]
María del Carmen Marquetti,Juan Bisset,Maureen Leyva,Aimara García
Revista Cubana de Medicina Tropical , 2008,
Abstract: OBJETIVOS: por causa de la permanencia de Aedes albopictus en el ecosistema urbano y periurbano de varios municipios, después de su introducción en Cuba en 1995, así como la presencia de poblaciones residuales de Aedes aegypti, se evaluó el comportamiento temporal y espacial de ambas especies en un municipio de Ciudad de La Habana. MéTODOS: se realizó la inspección de todos los locales del municipio Lisa durante enero-diciembre de 2006, se revisó todo tipo de depósitos con agua así como los criaderos naturales y las larvitrampas, dispositivo utilizado en la vigilancia del vector del dengue. RESULTADOS: se demostró la plasticidad ecológica de Aedes aegypti destacándose su presencia en los tanques bajos y las latas, mientras que Aedes albopictus prevaleció en las latas y las gomas. El mayor número de recipientes positivos para ambas especies se encontró en los meses julio-septiembre, perteneciente a la estación lluviosa en Cuba. Se evidenció una distribución alopátrica entre ambas especies; porque a pesar de estar Aedes aegypti distribuido en todo el municipio, su presencia fue menor en las áreas rurales donde predominó Aedes albopictus; aunque este último se mantuvo durante todo el a o con baja positividad en los recipientes. CONCLUSIONES: a pesar de las actividades directas de control contra Aedes aegypti que se desarrollan en Cuba de manera permanente, las cuales hacen que prevalezcan bajas densidades de la especie, Aedes albopictus no la ha desplazado de sus sitios de cría habituales. OBJECTIVES: Because of the permanence of Aedes albopictus in the urban and peri-urban ecosystems of various municipalities after the introduction of this vector in Cuba in 1995, as well as the presence of residual populations of Aedes aegypti, seasonal and spatial behaviour of both species was evaluated in a municipality of the City of Havana. METHODS: All the facilities located in Lisa municipality were inspected from January to December 2006 in which all kinds of water storage containers as well as natural breeding sites and larvitraps, a device for dengue vector surveillance, were surveyed. RESULTS: The ecological plasticity of Aedes aegypti was demonstrated, being mainly present in water storage tanks indoors and opened cans whereas Aedes albopictus prevailed in opened cans and water-filled tyres. The highest number of containers positive to both species was found from July to September during the rainy season in Cuba. In spite of the fact that Aedes aegypti was spread throughout the municipality, it was less predominant in rural areas than Aedes albopictus which in
Amostragem por larva-única na vigilancia de Aedes aegypti  [cached]
Bracco José Eduardo,Dal Fabbro Amaury Lelis
Revista de Saúde Pública , 1995,
Abstract: Com a finalidade de testar a metodologia de amostragem por larva-única na vigilancia entomológica do Aedes aegypti, foram pesquisados domicílios do Município de Araraquara, SP (Brasil). Nos criadouros que continham larvas de Aedes uma delas foi coletada. Como controle, após a coleta da larva-única, todas as larvas foram coletadas para identifica o posterior. Esse processo foi repetido no laboratório. Dos 447 domicílios visitados, apenas 12 foram considerados positivos e 20 criadouros foram identificados; destes, 13 continham larvas de Aedes; 5, larvas de Aedes e Culex e 2, larvas de Culex. Os resultados mostram o reconhecimento correto, no campo, de todos os criadouros, evidenciando que o método poderia ser utilizado na vigilancia entomológica de municípios sem infesta o domiciliar ou infestados apenas com uma única espécie de Aedes.
Estudio de resistencia de Aedes aegypti a Bacillus thuringiensis var: israelensis Study of Aedes aegypti resistance to Bacillus thuringiensis var: israelensis  [cached]
René Gato Armas,Manuel Díaz Pérez,Rosa Bruzón águila,Zulema Menéndez Díaz
Revista Cubana de Medicina Tropical , 2008,
Abstract: INTRODUCCIóN: el uso prolongado de insecticidas ha conducido al desarrollo de resistencia en diferentes especies de mosquitos incluido el Aedes aegypti, aunque hasta el momento no existen reportes de resistencia a Bacillus thuringiensis var. israelensis. OBJETIVOS: evaluar la resistencia a Bacillus thuringiensis var. israelensis en poblaciones de Aedes aegypti provenientes de sitios donde se ha aplicado la formulación líquida Bactivec (Labiofam) y en cepas de laboratorio bajo presión de selección. MéTODOS: se realizaron colectas de larvas en 3 municipios de Ciudad de La Habana y se establecieron las colonias de Aedes aegypti en el laboratorio, las cuales se compararon en susceptibilidad a Bacillus thuringiensis con la cepa de referencia Rockefeller. El experimento de selección se realizó exponiendo generaciones sucesivas de una cepa susceptible a la dosis letal 90 del biolarvicida. RESULTADOS: el índice de resistencia 50 para las cepas de los municipios Plaza, Cerro y Boyeros fue de 1,07, 0,66 y 0,81, respectivamente, por lo cual pueden considerarse susceptibles. La cepa expuesta a intensa presión de selección con el biolarvicida mostró índices de resistencia 50 y 95 de 2,7 y 4,6, respectivamente. La menor pendiente de la línea de regresión correspondió a la cepa bajo selección, lo que indica mayor variabilidad genética de esta población. CONCLUSIONES: estos resultados justifican la utilización de Bacillus thuringiensis var. israelensis como una alternativa para el control de estadios inmaduros de Aedes aegypti sin que exista evidencia hasta el presente de aparición de resistencia en poblaciones de campo, pero deben trazarse estrategias de manejo adecuadas ante la potencialidad del vector de adquirirla. INTRODUCTION: Prolonged use of insecticides has led to resistance development in different mosquito species including Aedes aegypti, although there is no report of resistance to Bacillus thuringiensis var. israelensis so far. OBJECTIVES: To evaluate resistance to Bacillus thuringiensis var. israelensis in Aedes aegypti populations from places where fluid preparation Bactivec (made in Labiofam company) has been applied, and in lab strains under selection. METHODS: Larvae were collected in three municipalities of the City of Havana province to settle Aedes aegypti colonies in the laboratory, which were compared with reference strain called Rockefeller in terms of susceptibility to Bacillus thuringiensis. The selection experiment was performed by exposing successive generations of a strain susceptible to lethal dose 90 of this biolarvicide. RESULTS: Resista
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