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Search Results: 1 - 10 of 175353 matches for " Brito Marylene de "
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Assessment of Aedes aegypti Pupal Productivity during the Dengue Vector Control Program in a Costal Urban Centre of S?o Paulo State, Brazil
Marylene de Brito Arduino
Journal of Insects , 2014, DOI: 10.1155/2014/301083
Abstract: The control of dengue relies on the elimination of vector breeding sites. This study identified the container categories most productive for A. aegypti within the framework of the S?o Paulo dengue vector control program (DVCP) in S?o Sebasti?o, a large city located on the state’s coast where dengue cases have occurred since 2001. Containers were inspected monthly for the occurrence of mosquito immature stages during two consecutive vector-breeding seasons in 2002–2004. Containers were classified by their material, use, and fixed or removable status. Pupal productivity differed significantly among container types, items made of metal and plastic, and boats being those with the highest relative contribution. Significant correlations between traditional indices of A. aegypti abundance (Container Index, House Index, and Breteau Index) and pupal productivity/demographic indices (Pupae/Container, Pupae/House, Pupae/ha, and Pupae/Person) ranged 0.56–0.65; correlations were not statistically significant for any combination involving the Pupae/Container index. The assessment of pupal productivity indices could be incorporated into the DVCP without any additional operational onus, allowing vector control managers to determine appropriate control actions targeting the most productive containers and sites. Further studies are needed to assess whether pupal productivity indices may be used as epidemiological indicators of risk of dengue transmission. 1. Introduction Dengue is an arboviral disease whose most severe form is dengue haemorrhagic fever, which is caused by four virus serotypes (DENV 1, 2, 3, and 4). Cases of dengue are recorded every year in more than 100 countries; approximately three billion people reside in areas at high risk for virus transmission. Due to the difficulties in combatting the mosquito vectors, vaccination represents an ideal means to control this global health problem. A candidate vaccine is presently showing promising results during the testing phase; however, it is still unavailable to the general population [1, 2]. In many tropical urban areas, the dengue virus is transmitted by the mosquito Aedes aegypti, whose life cycle is strictly associated with anthropic activities. This mosquito uses mostly artificial containers for oviposition and larval growth. Such containers are of a variable nature but are often found in domestic or peridomestic environments. Containers can range from discarded packaging materials creating water receptacles to larger water reservoirs, or they can be associated with building structures, such as drains or
Produtividade de criadouros de Aedes albopictus no Vale do Paraíba, SP, Brasil
Brito,Marylene de; Forattini,Oswaldo Paulo;
Revista de Saúde Pública , 2004, DOI: 10.1590/S0034-89102004000200009
Abstract: objective: to estimate the potential productivity of artificial, permanent, and natural breeding containers of aedes albopictus, potential vector species of dengue. methods: three locations were selected for this study: a) warehouse of disposable material goods in the urban area of pindamonhangaba, state of s?o paulo, brazil; b) a small leisure farmland in tremembé, state of s?o paulo; and c) residual forest in the periurban area of pindamonhangaba. all breeding containers were assessed and classified according to their water volume ( small (up to 1 liter), medium (over 1 but up to 10 liters), and large (over 10 liters), and type ( artificial, natural, and permanent). collections were carried out fortnightly for a period of 12 months, and a sample of fourth-instar larvae and pupae were collected from each container. statistical analysis was performed using the kriskal-wallis test, t-student test, and emergence estimate. results: the statistical analyses and emergence estimate (e) showed that artificial large-size containers and permanent medium container were on average the most productive, resulting 2.8 females a day, each. natural small and medium containers produced on average 0.5 and 0.6 females respectively. conclusions: there is a need for further studies on the potential productivity of containers not only of ae. albopictus but also of aedes aegypti, the main vector of dengue, which could contribute to better assessments of population densities in surveillance and control programs.
Reservatórios domiciliares de água e controle do Aedes aegypti
Forattini,Oswaldo Paulo; Brito,Marylene de;
Revista de Saúde Pública , 2003, DOI: 10.1590/S0034-89102003000500021
Abstract: water reservoirs for domestic use are important sites for the development of aedes aegypti. in poor areas, these reservoirs are often located outdoors upon flat rooftops. in modern architecture buildings, however, the same is seen even in high-class condominiums. special attention should be given to these modern architectural constructions during entomological surveillance.
Produtividade de criadouros de Aedes albopictus no Vale do Paraíba, SP, Brasil
Brito Marylene de,Forattini Oswaldo Paulo
Revista de Saúde Pública , 2004,
Abstract: OBJETIVO: Estudar o potencial de produtividade de criadouros artificiais, permanentes e naturais de Aedes albopictus, espécie considerada vetor potencial de dengue. MéTODOS: O estudo foi desenvolvido nos municípios de Tremembé e Pindamonhangaba, Estado de S o Paulo, em três locais selecionados: a) imóvel com atividades comerciais de compra e venda de materiais e recipientes descartáveis, em área urbana; b) chácara de lazer; c) mata de caráter residual. Realizou-se levantamento dos criadouros existentes em cada local, classificados quanto ao seu tamanho (volume de água) - pequeno (até um litro), médio (acima de um até 10 litros) e grande (acima de 10 litros) - e quanto ao tipo: artificial, natural e permanente. Foram executadas coletas em intervalos quinzenais por um período de 12 meses, retirando-se larvas de quarto estádio e pupas em cada tipo de criadouro existente. Para análise dos resultados, foram usados os testes de Kriskal-Wallis, t de Student e o cálculo de emergência. RESULTADOS: Segundo as análises estatísticas e o cálculo de emergência (E), os criadouros artificiais grande e o permanente médio foram, em média, mais produtivos para Aedes albopictus, contribuindo com 2,8 fêmeas por dia, cada. E os criadouros naturais pequenos e médios tiveram produ o média diária de 0,5 e 0,6 fêmeas, respectivamente. CONCLUS ES: Os resultados indicam a necessidade de se realizarem estudos sobre o potencial de produtividade de criadouros n o somente de Ae. albopictus, mas sobretudo de Aedes aegypti, principal vetor de dengue, o que poderia contribuir para o aprimoramento das avalia es das densidades populacionais, nos programas de vigilancia e controle.
Reservatórios domiciliares de água e controle do Aedes aegypti
Forattini Oswaldo Paulo,Brito Marylene de
Revista de Saúde Pública , 2003,
Abstract: Os reservatórios domiciliares de água, comumente conhecidos como caixas d'água, constituem fonte de desenvolvimento do Aedes aegypti. Em áreas com edifica es precárias existe tendência para situar essas caixas sobre a laje das casas. Todavia, observa-se na arquitetura moderna a mesma situa o em rela o a esses recipientes, mesmo em condomínios de luxo. Assim sendo, chama-se a aten o para a necessidade de, na vigilancia entomológica, ter cuidado especial para tais reservatórios domiciliares de água.
Método de varredura para exame de criadouros de vetores de dengue e febre amarela urbana
Kubota,Roseane Lieko; Brito,Marylene de; Voltolini,Júlio Cesar;
Revista de Saúde Pública , 2003, DOI: 10.1590/S0034-89102003000200017
Abstract: to estimate the minimum numbers of "sweepings" for a representative sampling of larvae in a large container. 200 larvae in 4th stage were added in an 80-liter drum to carry out the experiment, in each retort was made 10 sweepings using a plastic sieve. two hundred larvae in stage 4 were added to an 80-liter-drum and using a plastic sieve10 sweepings were carried out in each experiment replicate. the results showed that 8 sweepings were enough to collect up to 72% of the total sample in the container, i.e., an average of 143±1.97. the proposed method proved to be easily and effectively implemented and allowed for the inspection of containers with large water volumes. these findings reinforce its use as an important potential tool in the routine vectorial surveillance of control programs of dengue and yellow fever.
Método de varredura para exame de criadouros de vetores de dengue e febre amarela urbana
Kubota Roseane Lieko,Brito Marylene de,Voltolini Júlio Cesar
Revista de Saúde Pública , 2003,
Significado epidemiológico dos criadouros de Aedes albopictus em bromélias
Forattini,Oswaldo Paulo; Marques,Gisela Rita Alvarenga Monteiro; Kakitani,Iná; Brito,Marylene de; Sallum,Maria Anice Mureb;
Revista de Saúde Pública , 1998, DOI: 10.1590/S0034-89101998000200014
Abstract: a breeding place of immature stages of aedes albopictus in bromeliads is described. the epidemiological role of bromeliaceae as natural or artificial containers, is discussed. the ability of the mosquito to expand its habitat calls for attention especially as regards its adaptability as an invading species.
Novos encontros de anofelíneos em recipientes artificiais
Forattini,Oswaldo Paulo; Kakitani,Iná; Marques,Gisela Rita Alvarenga Monteiro; Brito,Marylene de;
Revista de Saúde Pública , 1998, DOI: 10.1590/S0034-89101998000600015
Abstract: new findings of anopheles mosquitoes in artificial containers are reported. in one, a plastic container served as a breeding place for anopheles bellator larvae and, in another, four instar larvae of an. albitarsis s.l. were found in an abandoned toilet basin. reflections are offered as to the selective pressure represented by the production, of an ever increasing scale, of disposable objects.
Formas imaturas de anofelíneos em recipientes artificiais
Forattini,Oswaldo Paulo; Kakitani,Iná; Marques,Gisela Rita Alvarenga Monteiro; Brito,Marylene de;
Revista de Saúde Pública , 1998, DOI: 10.1590/S0034-89101998000200015
Abstract: immature stages of anopheles bellator and of an. argyritarsis were found in artificial containers. the great number of on-returnable containers now produced, may be playing an important role in the increase in the number of available breeding places for culicid mosquitoes.
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