Resumo

FERNANDEZ R, Werther et al. Spatial distribution, season effect, and most common recipient type association with Aedes aegypti entomological and larval indexes in Yurimaguas, Peru, 2000-2004. Rev. perú. med. exp. salud publica [online]. 2005, vol.22, n.3, pp.191-199. ISSN 1726-4634.

Objectives: To define characteristics and associations of three entomological indexes for Aedes aegypti with respect to their spatial distribution, season effect, and most commonly used water recipients in Yurimaguas, Peru, between 2000 and 2004. Materials and Methods: Data from 100% larval censuses for the study period using three entomological indexes: Aedes index, recipient index, and Breteau index. The city was divided in eleven areas, containers were classified in ten categories, and seasons were classified as rainy season (November to April) and dry season (May to October). In order to establish differences between censuses according to months, years, types of containers, zones, and seasonality, the Student’s T test and an ANOVA were used; and Spearman’s correlation was used to assess the relationship between entomological indexes. Results: 10 542 households were surveyed, and 538 802 containers were inspected. The three entomological indexes showed differences between the eleven areas studied. Highly positive values were found for the following five categories: junk, tires, short tanks, vases-flowerpot holders, and barrels-cylinders. Junk accounted for 37,37% of positive containers; 161 (4,2% households had 3 recurrences in inspections between 2000 and 2004. Highest values in entomological indexes were found during the rainy season, and the three entomological indexes were related between them. Conclusions: Spatial distribution, most commonly used containers and rainy season are factors influencing population dynamics of entomological indexes for A. aegypti in Yurimaguas, Peru.

Palavras-chave : Aedes aegypti; Dengue / prevention y control; Entomological indexes; Rainy Season; Vectorial Control; Peru (source: DeCS BIREME).

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