Ecological aspects of arboviroses in Brazilian Amazonas, South America

• Autor(a) principal: Dégallier, Nicolas
• Data de Publicação: 1996
• Outros Autores: Rosa, Amélia Paes de Andrade Travassos da, Vasconcelos, Pedro Fernando da Costa, Rosa, Jorge Fernando Soares Travassos da, Rosa, Elizabeth Salbé Travassos da, Rodrigues, Sueli Guerreiro
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Digital do Instituto Evandro Chagas (Patuá)
• Texto Completo: https://patua.iec.gov.br/handle/iec/2699
• topic: Arbovirus / classificação; Ecologia; Vetores de Doenças; Meio Ambiente; Região Amazônica (BR)

Ecological data on the known hosts of 186 arbovirus species which have been shown to occur in Brazilian Amazonia are examined. In order to make an ecological classification of viruses, according to the ecology of their hosts, a multi-dimensional niche concept has been retained. Both vertebrate and in vertebrate hosts have been separated by their soil vs. canopy preferences and diurnal vs. nocturnal behavior. It has been verifïed that the number of hosts envolved in transmission cycles (ecological diversification) seem to be independent from the systematic diversification of the viruses. Another interesting fact is that each serological group has but one virus in one virus in one ecological group, probably meaning that serological constraints are at work during its ecological diversification. The main result f our studies concerns the dynamic equilibrium which characterizes communities. Perturbations of this equilibrium, and the fairly quick recover of a new one, have been shown to occur during the construction of big dams in Amazonia. The needs for future researchs are, among others: the hosts of 2/3 of the viruses, the variations of the virus community along time and the genetics of emergent types.