Population dynamics, structure and behavior of Anopheles darlingi in a rural settlement in the Amazon rainforest of Acre, Brazil
Autor(es): Moutinho, Paulo Rufalco; Soares Gil, Luis Herman; Cruz, Rafael Bastos; Martins Ribolla, Paulo Eduardo
Resumo: Anopheles darlingi is the major vector of malaria in South America, and its behavior and distribution has epidemiological importance to biomedical research. In Brazil, An. darlingi is found in the northern area of the Amazon basin, where 99.5% of the disease is reported.Methods: The study area, known as Ramal do Granada, is a rural settlement inside the Amazon basin in the state of Acre. Population variations and density have been analysed by species behaviour, and molecular analysis has been measured by ND4 mitochondrial gene sequencing. The results show higher density in collections near a recent settlement, suggesting that a high level of colonization decreases the vector presence. The biting activity showed higher activity at twilight and major numbers of mosquitos in the remaining hours of the night in months of high density. From a sample of 110 individual mosquitoes, 18 different haplotypes were presented with a diversity index of 0.895, which is higher than that found in other Anopheles studies. An. darlingi depends on forested regions for their larval and adult survival. In months with higher population density, the presence of mosquitoes persisted in the second part of the night, increasing the vector capacity of the species. Despite the intra-population variation in the transition to rainy season, the seasonal distribution of haplotypes shows no change in the structure population of An. darlingi.
Palavras-Chave: Mitochondrial DNA variation; Malaria vector; Aedes aegypti; Southern Venezuela; Bolivian amazon; Larval habitats; Central America; Endemic areas; Upper orinoco; Culicidae
Imprenta: Malaria Journal, v. 10, 2011
Identificador do objeto digital: 10.1186/1475-2875-10-174
Descritores: Aedes aegypti - DNA
Data de publicação: 2011
