12 research outputs found
Land Restoration for Achieving the Sustainable Development Goals - An International Resource Panel Think Piece
Structure of Anopheles (Diptera: Culicidae) population in areas with different degrees of human settlement: CantĂĄ - Roraima - Brazil
Malaria vectors in the Brazilian Amazon: Anopheles of the subgenus Nyssorhynchus
Various species of Anopheles (Nyssorhynchus) were studied in the Amazon with the objective of determining their importance as malaria vectors. Of the 33 known Anopheles species occurring in the Amazon, only 9 were found to be infected with Plasmodium. The different species of this subgenus varied both in diversity and density in the collection areas. The populations showed a tendency towards lower density and diversity in virgin forest than in areas modified by human intervention. The principal vector, An. darlingi, is anthropophilic with a continuous activity cycle lasting the entire night but peaking at sunset and sunrise. These species (Nyssorhynchus) are peridomiciliary, entering houses to feed on blood and immediately leaving to settle on nearby vegetation. Anopheles nuneztovari proved to be zoophilic, crepuscular and peridomiciliary. These habits may change depending on a series of external factors, especially those related to human activity. There is a possibility that sibling species exist in the study area and they are being studied with reference to An. darlingi. An. albitarsis and An. nuneztovari. The present results do not suggest the existence of subpopulations of An. darlingi in the Brazilian Amazon
Estratificação ambiental e otimização de rede de ensaios de genótipos de soja no Cerrado
Inventårio de mosquitos (Diptera: Culicidae) da Unidade de Conservação Ambiental Desterro, Ilha de Santa Catarina, Sul do Brasil
Studies on entomological monitoring: mosquito species frequency in riverine habitats of the Igarapava Dam, Southern Region, Brazil
First record of Anopheles (Anopheles) costai Fonseca & Ramos, 1939 in EspĂrito Santo State, Brazil
Mosquitos Culicidae como vetores emergentes de infecçÔes Culicidae mosquitoes as emerging vectors of diseases
Apresenta-se sucinta revisĂŁo do relacionamento entre as chamadas infecçÔes emergentes e o conceito de vetores emergentes. Estes sĂŁo entendidos nĂŁo apenas no que concerne aos que sĂŁo descritos como tais, de forma nova, mas tambĂ©m aqueles com acentuadas mudanças de comportamento. Os fatores especĂficos que propiciam esse fenĂŽmeno identificam-se Ă poderosa influĂȘncia humana sobre o ambiente. Assim, aquele construĂdo pelo homem e conhecido como antrĂłpico representa a função de pressĂŁo seletiva que induz as populaçÔes vetoras a se adaptarem Ă s novas circunstĂąncias. Nelas inclui-se fatores ecolĂłgicos ambientais, ou demogrĂĄficos, que incrementam o contato com os novos comportamentos vetoriais. Relata-se o encontro de criadouros anĂŽmalos de mosquitos Culicidae nas AmĂ©ricas. A interpretação desses encontros Ă© feita visando Ă vigilĂąncia epidemiolĂłgica. O significado dessa emergĂȘncia ou reemergĂȘncia pode se traduzir no aparecimento de problemas epidemiolĂłgicos. Sugere-se que, em sendo assim, a vigilĂąncia epidemiolĂłgica deva ser feita em grau global.<br>A review is presented of the relationships between the so-called emerging infectious diseases and what may be defined as emerging vectors. These include not only those that have recently appeared but also those that present remarkable behavioral changes. Specific factors leading to that emergence can be associated with the powerful human influence on the environment. So the man-made, i.e. anthropic environment, exercises a selective pressure inducing vector populations to adapt to new circumstances. These may arise from ecological, environmental, or demographic factors that increase contact with the new vector. With this in mind, data on anomalous Culicidae breeding places in the Americas are reported. An interpretation of these findings is offered in the light of epidemiological surveillance. The question is whether vector emergence or re-emergence may constitute an epidemiological problem. Thus it is suggested that plane for all inclusive surveillance be prepared