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Infestación de Aedes (St.) aegypti en bebederos de animales en un área de salud Translated title: Aedes (St.) aegypti infestation of troughs for animals in a health area

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      Abstract

      INTRODUCCIÓN: Aedes aegypti, importante vector del dengue/dengue hemorrágico, tiene al ambiente urbano como sitio preferencial para su desarrollo, el cual es muy inestable y le brinda numerosos recursos para su superviviencia. OBJETIVOS: evaluar el aporte entomoepidemiológico que brindan los bebederos de animales, en la infestación de Ae. aegypti en un área de salud urbana de la provincia de Camagüey. MÉTODOS: se determinó el total de bebederos positivos desglosado según el tipo de animal que lo utiliza, así como el porcentaje de bebederos positivos indicado como índice recipiente específico (IRe). Se determinó además el total de bebederos con presencia de pupas, así como el total de estas por tipo de depósito, cada uno fue caracterizado. RESULTADOS: se apreció que los bebederos aportaron 4,62 % de positividad, con un índice recipiente específico equivalente a 0,74 %, de ellos 6 eran utilizados por gallinas, 5 por conejos y 1 por monos y perros, respectivamente. Fueron detectadas 6 pupas (0,46 pupa/bebedero). CONCLUSIONES: estos receptáculos que se caracterizaron por encontrarse ubicados en el exterior de las viviendas, y la mayoría a la sombra, a pesar de no aportar un número importante de focos deben tenerse en cuenta para el diseño de las estrategias de control, lo que contribuirá a garantizar la no existencia de huevos residuales del vector en las viviendas.

      Translated abstract

      INTRODUCTION: Aedes aegypti, important vector of dengue/hemorrhagic dengue, prefer the urban environment for its very unstable development since it provides it with a number of possibilities for its survival. OBJECTIVES: to evaluate the entomological and epidemiological contributions of troughs for animals to Ae aegyti infestation in an urban health area in Camagüey province, Cuba. METHODS: The total number of troughs positive to the mosquito, broken down by type of animal using it, as well as the percentage of positive troughs taken as specific reservoir index were estimated. Also, all the troughs containing pupas and the total number of pupas per type of trough were determined; each of them was characterized. RESULTS: it was observed that troughs represented 4.62 % of positive sites, with a specific reservoir index equals to 0.74 %; 6 troughs were used by chicken, 5 by rabbits and one by monkeys and the other by dogs. Six pupas were detected (0.46 pupa/trough). CONCLUSIONS: these reservoirs that are mainly placed outdoors in shady areas, though they did not give rise to a substantial number of foci, one must be taken it into account to designing new control strategies, which will help in assuring the non-existence of residual eggs in dwellings.

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      Most cited references 26

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      Pupal survey: an epidemiologically significant surveillance method for Aedes aegypti: an example using data from Trinidad.

      This report documents the results of a country-wide pupal survey of Aedes aegypti (L.) conducted in Trinidad. The survey was designed to identify the important Ae. aegypti-producing containers, importance being a function of a container's abundance and its productivity. Results are summarized on a country-wide basis and by county: urban versus rural comparisons are also made. Numerically, the most common water-filled containers positive for the larvae or pupae of Ae. aegypti (foci) were outdoor drums, water storage tanks and buckets, laundry tubs, discarded tires, and small miscellaneous containers such as drink bottles and cans. The island-wide average number of foci per hectare was 287 and ranged between 65 and 499. The average standing crop per container of Ae. aegypti pupae was 9.5 and ranged 12-fold, the most and least productive being the flower pot (> 30) and the small indoor vase ( 90% of all Ae. aegypti pupae: the remaining seven types were responsible for 80% of Ae. aegypti production in the country. In our survey, the traditional Stegomyia indices used to document the density of Ae. aegypti and predict the threat of dengue transmission, the House, Container, and Breteau indices, were seen to have virtually no correspondence with the actual number of pupae per hectare or per person. We conclude that pupal survey is more appropriate for assessing risk and directing control operations.
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        Reporte de hábitats utilizados por Aedes aegypti en Ciudad de La Habana, Cuba

        Se reportaron 50 hábitat utilizados por Aedes aegypti en el ambiente urbano de Ciudad de La Habana, correspondiendo 66 % a depósitos artificiales, de los cuales 57,5 % fue clasificado como no útil por la población; los recipientes de uso doméstico constituyeron 14 %, mientras que los criaderos naturales aportaron 8 %. Como un resultado interesante 12 % de los hábitat está representado por fosas, alcantarillas y drenajes que contienen las llamadas aguas negras; factor que debe considerarse en la epidemiología del dengue en Cuba y merece un estudio de los factores ecológicos asociados a la especie que pudieran estar influyendo en este comportamiento; además se estimula a alcanzar niveles adecuados de participación comunitaria como una herramienta en el control de este peligroso vector.
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          Disposable containers as larval habitats for Aedes aegypti in a city with regular refuse collection: a study in Marília, São Paulo State, Brazil.

          In Marília, Brazil, refuse is collected at least every other day, yet non-useful, non-returnable containers such as cans, plastic bottles and tires account for almost half of the container habitats found positive for the Aedes aegypti mosquito. A study was therefore conducted to investigate why these containers exist despite regular refuse collection and a high level of awareness of dengue prevention, and how the control program could most effectively respond. Differing community perceptions as to what constitutes refuse were found to lead people to store a variety of containers in their yard. Other dimensions of the problem include the presence of informal refuse collectors in search of saleable materials, and dumping of refuse in vacant lots and along roads. An intervention based on these data will involve the informal refuse collectors in implementation of a community-based recycling project.
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            Author and article information

            Affiliations
            [1 ] . Policlínico Universitario Ignacio Agramonte. Cuba
            [2 ] Fundación Canaria Rafael Clavijo. Spain
            Contributors
            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
            April 2009
            : 61
            : 1
            : 0
            S0375-07602009000100012

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

            Product
            Product Information: SciELO Cuba
            Categories
            TROPICAL MEDICINE

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