Ocorrência da Dengue em áreas urbanas selecionadas e sua associação com indicadores entomológicos e de intervenção Belo Horizonte, Brasil

Abstract

Introduction: A disordered urbanization is characterized by the existence of spacial aggregate with different socioeconomic and environmental conditions. Most of these aggregates feature propitious conditions for the proliferation of the vector which increases the risk of dengue transmission. This study described and compared the incidence of dengue in determined areas (called strata) with different levels of infestation and results in relation to ongoing public health interventions in Belo Horizonte. Objective: To determine and quantify the association between the occurrence of dengue and entomological and intervention indicators in Belo Horizonte. Methods: We conducted an observational ecological study. Univariate analysis of dengue incidence rates and categories of entomological and intervention indicators was carried out using a negative binomial model. Results: There was heterogeneity between the strata in terms of dengue incidence rate (minimum of 276.4 and maximum of 9398.1/100,000) with an average of 3285.5. Strata with house infestation index 3% had RR = 2.9 (95%CI: 1.3 6.4), as compared to those with <2%. In areas with egg average 20 the RR was 3.3 (95%CI: 1.5 7.3), when contrasted with those with <10. The RR in places with percentage no access between 10 24.9 was 7.9 (95%CI: 4.4 14.4), as compared to those <10%. No association was found between coverage and dengue incidence rate. Conclusions: The results indicated that both infestation indicators and the proportion of properties not accessed for the focal treatment were associated with high risk of occurrence of dengue in the sanitary districts and strata of Belo Horizonte and that dengue incidence is heterogeneous across these aggregates.