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Isolation and molecular characterization of Bacillus thuringiensis found in soi...
Lobo,Katiane dos Santos; Soares-da-Silva,Joelma; Silva,Maria Cleoneide da; Tadei,Wanderli Pedro; Polanczyk,Ricardo AntonioABSTRACT This study investigated the potential of Bacillus thuringiensis isolates obtained in the Cerrado region of the Brazilian state of Maranhão for the biological control of Aedes aegypti larvae. The isolates were obtained from soil samples and the identification of the B. thuringiensis colonies was based on morphological characteristics. Bioassays were run to assess the pathogenicity and toxicity of the di...
Isolation of Bacillus thuringiensis from the state of Amazonas, in Brazil, and ...
Soares-da-Silva,Joelma; Pinheiro,Valéria Cristina Soares; Litaiff-Abreu,Eleilza; Polanczyk,Ricardo Antonio; Tadei,Wanderli PedroWe investigated the use of Bacillus thuringiensis isolated in the state of Amazonas, in Brazil, for the biological control of the dengue vector Aedes aegypti. From 25 soil samples collected in nine municipalities, 484 bacterial colonies were obtained, 57 (11.78%) of which were identified as B. thuringiensis. Six isolates, IBt-03, IBt-06, IBt-07, IBt-28, IBt-30, and BtAM-27 showed insecticidal activity, and only...
Conhecimentos de estudantes sobre Leishmaniose Visceral em escolas públicas de ...
Lobo,Katiane dos Santos; Bezerra,Juliana Maria Trindade; Brito,Luciane Maria de Oliveira; Silva,Joelma Soares da; Pinheiro,Valéria Cristina SoaresTrata-se de um inquérito amostral (743 questionários), realizado nos meses de abril a novembro de 2009 em dez escolas públicas municipais, previamente sorteadas e localizadas em oito bairros da cidade de Caxias. Avaliou-se por meio da aplicação de questionários fechados, o conhecimento dos estudantes sobre a Leishmaniose Visceral (LV), seu vetor e prevenção. Os resultados mostraram mudanças com maior percentual...
Variation in Aedes aegypti (Linnaeus) (Diptera, Culicidae) infestation in artif...
Soares-da-Silva,Joelma; Ibiapina,Sebastiana Silva; Bezerra,Juliana Maria Trindade; Tadei,Wanderli Pedro; Pinheiro,Valéria Cristina SoaresINTRODUCTION: Dengue is a serious public health problem worldwide, with cases reported annually in tropical and subtropical regions. Aedes aegypti (Linnaeus, 1762), the main vector of dengue, is a domiciliary species with high dispersal and survival capacities and can use various artificial containers as breeding sites. We assessed potential container breeding sites of A. aegypti in the municipality of Caxias, ...
Evaluation of students' knowledge as a contribution to dengue control programs
Bezerra,Juliana Maria Trindade; Silva,Joelma Soares-da; Ibiapina,Sebastiana Silva; Tadei,Wanderli Pedro; Pinheiro,Valéria Cristina SoaresThis study describes a survey (n=700) carried out in 14 elementary schools in the municipality of Caxias, State of Maranhão, Brazil. The survey was conducted between July and December 2007 in schools from seven neighborhoods on the outskirts of the western part of the municipality, where for the past three years high densities of immature Aedes aegypti mosquitoes have been recorded. The students' knowledge of d...
Evaluation of the residual effect of temephos on Aedes aegypti (Diptera, Culici...
Pinheiro,Valéria Cristina Soares; Tadei,Wanderli PedroTrial tests and container observations were conducted in households to verify the residual effect of temephos in Manaus, Amazonas State, Brazil. Three plastic buckets, three tin cans, and three tires filled with water from an artesian well and larvicide were used in the experiment, with twenty-five third-instar larvae, which remained exposed for 24h, followed by mortality readings. The same types of containers ...