Population dynamics, structure and behavior of Anopheles darlingi in a rural settlement in the Amazon rainforest of Acre, Brazil

Malaria Journal

Research

Paulo Rufalco Moutinho¹  Paulo Eduardo Martins Ribolla¹  Luis Herman Soares Gil²  Rafael Bastos Cruz² 

[1] Departamento de Parasitologia, Instituto de Biociências de Botucatu, Universidade Estadual Paulista, Botucatu, São Paulo, Brasil;Instituto de Pesquisa em Patologias Tropicais, Porto Velho, RO, Brasil;

关键词: Malaria;    Rainy Season;    Malaria Vector;    Breeding Site;    Amazon Basin;   

DOI  :  10.1186/1475-2875-10-174

 received in 2010-09-09, accepted in 2011-06-24,  发布年份 2011

来源: Springer

【 摘 要 】

BackgroundAnopheles 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.MethodsThe 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.ResultsThe 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.ConclusionsAn. 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.

【 授权许可】

Unknown   
© Moutinho et al; licensee BioMed Central Ltd. 2011. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.