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Previous issue date: 2011-02-21 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The sand fly Lutzomyia longipalpis (Diptera: Psychodidae) is currently appointed as the main vector of visceral leishmaniasis in the Americas. The growth of cities in areas originally endemics to American Visceral Leishmaniasis (AVL) resulted in the spread of the disease at the same time that observed the adaptation of this species to the urban environment.Changes in behavior of L.longipalpis that enabled the adapt to increasing losings of biodiversity, as well as the frequent exposure of the vector to insecticides evident in urban areas, could justify the increasing population of the species and consequently the spread of disease for these environments .Thus, we selected sixty houses spread among three areas with increasing stages of occupation of an area endemic for AVL in Teresina-PI. We evaluated the correlation between the density of L.longipalpis captured and different aspects, such as population density of animals, vegetation cover and socio-economic aspects in each house. In addition to the correlations, the feeding preference of the vector between the predominant plant species in the neighborhoods, as well as the presence of metabolic mechanisms of resistance among the captured insects were tested. The results showed that over the growing occupations, represented by three areas, L.longipalpis demonstrate its adaptive nature through an apparent opportunistic behavior in relation to sources of carbohydrates and blood. On the evolutionary point of view, this behavior may have favored its vector competence in urban areas among the limited presence of food sources, as well as in various environments encountered. / O flebotom?neo Lutzomyia longipalpis (Diptera: Psychodidae) ? atualmente apontado como o principal vetor da leishmaniose visceral nas Am?ricas. O crescimento das cidades em ?reas originalmente end?micas para Leishmaniose Visceral Americana (LVA) resultou na dissemina??o da doen?a ao mesmo tempo em que observou a adapta??o desta esp?cie para o ambiente urbano. Mudan?as no comportamento de L.longipalpis que permitiram a sua adapta??o ?s crescentes perdas de biodiversidade, bem como a exposi??o frequente do vetor aos inseticidas evidentes nas ?reas urbanas, poderiam justificar o aumento populacional da esp?cie e, consequentemente, a propaga??o da doen?a para estes ambientes. Assim, foram selecionadas sessenta casas distribu?das entre tr?s ?reas com as crescentes etapas de ocupa??o de uma ?rea end?mica para leishmaniose visceral em Teresina-PI. Avaliamos a correla??o entre a densidade de L.longipalpis capturados e diferentes aspectos, tais como a densidade populacional de animais, a cobertura vegetal e aspectos socioecon?micos em cada resid?ncia. Al?m das correla??es, a prefer?ncia alimentar do vetor entre as esp?cies vegetais predominantes nos bairros, bem como a presen?a de mecanismos metab?licos de resist?ncia entre os insetos capturados, foram testados. Os resultados apontaram que, durante as crescentes ocupa??es, representadas pelas tr?s ?reas, L.longipalpis demonstra a sua natureza adaptativa por meio de um aparente comportamento oportunista em rela??o ?s fontes de carboidratos e de sangue. Do ponto de vista evolutivo, este comportamento pode ter favorecido sua compet?ncia vetorial em ?reas urbanas entre a limitada presen?a de fontes de alimentos, bem como nos v?rios ambientes encontrados.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/13071 |
| Date | 21 February 2011 |
| Creators | Martins, Kelsil?ndia Aguiar |
| Contributors | CPF:20007256434, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4786307T7&dataRevisao=null, Barros, Veruska Cavalcanti, CPF:02467254607, http://lattes.cnpq.br/9073798312880036, Cavalcante, Reginaldo Roris, Ximenes, Maria de F?tima Freire de Melo |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Ci?ncias Biol?gicas, UFRN, BR, Biodiversidade; Biologia Estrutural e Funcional. |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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