Infestação de área urbana por Aedes aegypti e relação com níveis socioeconômicos

Abstract

OBJECTIVE:To assess the association between Aedes aegypti larvae infestation rates and socioeconomic factors. METHODS:Infestation rates in the urban area of the city of São José do Rio Preto, Southeastern Brazil, were calculated in January of 2005 and subsequently geocoded by address. The urban census tracts were grouped by means of main component analysis, thus producing four socioeconomic clusters (1-4, in a decreasing order of socioeconomic level) and a fi fth cluster (5) with a level below the others and not belonging to the urban census tracts (new districts and irregular residential development projects). The Breteau index (BI), the house index (HI), and the container index (CI), as well as the averages of existing containers surveyed per home, were calculated for each cluster. RESULTS:The values of infestation indices did not show signifi cant differences among socioeconomic clusters 1 to 4, even though they were lower than the indices obtained for cluster 5. The averages of existing containers surveyed were higher for cluster 1 in relation to clusters 2 to 4, but did not show signifi cant differences when compared to cluster 5. CONCLUSIONS:Larval indices did not show association with the different socioeconomic levels of the cluster that corresponds to the urban census tracts. Nonetheless, new districts, irregular residential development projects and locations adjacent to those with the worst basic sanitary conditions showed the highest values for these indicators.

Occurrence of Aedes aegypti (Diptera, Culicidae) in a Dengue Transmission Area at Coastal Maranhão State, Brazil

“…aegypti larvae was observed by Ferreira and Chiaravalotti Neto [28] at the county of São José do Rio Preto, São Paulo State, Brazil.…”

Análise espacial da ocorrência de dengue e condições de vida na cidade de Nova Iguaçu, Estado do Rio de Janeiro, Brasil

“…Alguns autores abordam a relação entre variáveis relacionadas às condições de vida da população e a ocorrência da dengue; entretanto os resultados encontrados são divergentes 13,14,15,16,17 . A maioria destes estudos utilizou metodologia em que as variáveis relativas às condições de vida foram abordadas num mesmo nível, não contemplando o contexto social enquanto unidade complexa, no qual fatores sócio-culturais e estruturais urbanos geram uma realidade única em cada local, favorecendo ou não a disseminação da dengue.…”

Diferenciais intraurbanos na distribuição de dengue em Cuiabá, 2007 e 2008

“…Studies in the city of São José do Rio Preto, in São Paulo, showed total independence between infestation assessed through the Bretau index, building index and container index, and socio-economic conditions in the four city districts 17 . However, the levels of infestation in the city were higher in areas with a lower socio-economic level and deficient sanitary infra-structure.…”

“…In this way, given that vector control depends essentially on the level of involvement of the population in daily actions to eliminate breeding pools, populations with a better level of schooling and income would be expected to live in neighborhoods with lower or null building infestation rates. However, other factors may change this expectation, as, for example, a higher number of containers with breeding potential, such as not regularly treated swimming pools, large badly sealed water reservoirs, vases, types of plants used in gardening and ornaments, fountains, and others [15][16][17] .…”