Para captura de pequenos insetos descrevemos uma armadilha que julgamos vantajosa, pela facilidade de obtanção de seu material de construção, por ser de baixo custo,portátil, resistente, utilizar pilhas e, sendo opaca, possibilitar uma maior concentração de luz sobre o orifício de entrada de insetos. A new model of a fan-suction lighttrap for collecting small insects is described. Its advantages include easily obtained material, robust construction, battery operation, portability and low cost. in addition, being opaque it permits a high concentration of light on the opening through which the insects are sucked in
The effect of deltamethrin of the sandfly population in a focus of American Cutaneous Leishmaniasis in Viana, Espírito Santo State is described. The phlebotomine population density was determined inside and outside houses during a one year period in a treated and untreated area. The results showed a significant reduction in the number of sandflies inside houses in the treated area compared with both the untreated area and the same area before spraying. Despite having a residual action for 12 months after spraying the insecticide was ineffective outside houses. It is concluded therefore that deltamethrin is an efficient insecticide for reducing the number of phlebotomine sandflies inside houses.
The development of four isolates of Leishmania from foci of American cutaneous leishmaniasis was studied in Lutzomyia longipalpis. The suggestion that the differences in the development of the Leishmania in the invertebrate host are of great taxonomic significance was confirmed. The pattern of development of three strains was typical of parasites of the subgenus Leishmania, the other was similar to Leishmania of the subgenus Viannia. The identification of the strains using other criteria is in agreement with biological characterization. The results show that the morphological and morphometric study of promastigotes do not clearly define the taxonomic position of the parasites but other studies are needed to confirm this
Miniature light traps used to collect Phlebotominae in a focus of dermal leishmaniasis in the eastern part of the State of Minas Gerais, Brazil. Over a period of seven months, the other Diptera captured in 179 light trap samples were identified to family level. The traps were placed in eight localities which constituted three different biotopes: three woodland aresas, cultivated land, and a peridomestic site. A comparison is made between the totals of Dipeterans collected in each biotope, the total numbers of families collected in each biotope and the estimated indices of diversity. Dendograms representing the degrees of association between families of Diptera in different biotopes are presented. Some families of Diptera are uniformly distributed throughout the study area; a few families seem to have become adapted to areas where human activity has induced the greatest ecological changes. The impact between Dipterans and human well-being is discussed. The availabel evidence indicates that transmission of dermal leishmaniasis does not occur in areas where sand flies can be captured in greatest densities. Foram usadas armadilhas luminosas para coleta de flebotomíneos em um foco de leishmaniose tegumentar a leste do Estado de Minas Gerais, Brasil. Durante um período de sete meses as 179 amostras de outros Dipteros capiturados com aramdilhas luminosas foram identificadas a nível de família. As armadilhas foram colocadas em oito locais constituídos de três diferentes biótopos: três áreas de floresta, áreas cultivadas e peridomicílio. Foi feita uma comparação entre o total de Dipteros coletados em cada biótopo, o total de famílias coletadas em cada biótopo, sendo estimado o índice de diversificação. São apresentados dendrogramas com o grau de associação entre as famílias de Dipteros em diferentes biótopos. Algumas famílias de Dipteros foram uniformemente distribuídas através da área estudada; poucas famílias parecem ter se adaptado às áreas onde a atividade humana causou as maiores mudanças ecológicas. E discutido o impacto entre os Dipteros e o bem estar humano. As evidências obtidas neste trabalho indicam que a transmissão da leishmaniose tegumentar não está atualmente ocorrendo nas áreas estudadas, apesar da alta densidade de flebótomos capturados
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