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Link to original content: http://www.ncbi.nlm.nih.gov/pubmed/20161131
Urban structure and dengue fever in Puntarenas, Costa Rica - PubMed Skip to main page content
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. 2009 Jul 1;30(2):265-282.
doi: 10.1111/j.1467-9493.2009.00367.x.

Urban structure and dengue fever in Puntarenas, Costa Rica

Adriana Troyo  1 , Douglas O Fuller, Olger Calderón-Arguedas, Mayra E Solano, John C Beier
Affiliations

Urban structure and dengue fever in Puntarenas, Costa Rica

Adriana Troyo et al. Singap J Trop Geogr. .

Abstract

Dengue is currently the most important arboviral disease globally and is usually associated with built environments in tropical areas. Remotely sensed information can facilitate the study of urban mosquito-borne diseases by providing multiple temporal and spatial resolutions appropriate to investigate urban structure and ecological characteristics associated with infectious disease. In this study, coarse, medium and fine resolution satellite imagery (Moderate Resolution Imaging Spectrometer, Advanced Spaceborne Thermal Emission and Reflection Radiometer and QuickBird respectively) and ground-based data were analyzed for the Greater Puntarenas area, Costa Rica for the years 2002-04. The results showed that the mean normalized difference vegetation index (NDVI) was generally higher in the localities with lower incidence of dengue fever during 2002, although the correlation was statistically significant only in the dry season (r=-0.40; p=0.03). Dengue incidence was inversely correlated to built area and directly correlated with tree cover (r=0.75, p=0.01). Overall, the significant correlations between dengue incidence and urban structural variables (tree cover and building density) suggest that properties of urban structure may be associated with dengue incidence in tropical urban settings.

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Figures

Figure 1
Figure 1
Map showing the location of the 30 health localities – 10 in Puntarenas City included in the QuickBird imagery and analyses, the remaining 20 included in ASTER and MODIS images and analyses – in the Greater Puntarenas study area, Puntarenas Province, Costa Rica.
Figure 2
Figure 2
Weekly number of dengue cases reported and rainfall in the Greater Puntarenas area, Puntarenas Province, Costa Rica, 2002–4.
Figure 3
Figure 3
Monthly enhanced vegetation index (EVI) and reported dengue cases in the Greater Puntarenas area, Puntarenas Province, Costa Rica, 2002.
Figure 4
Figure 4
Masked sections of the back-propagation artificial neural network (A) and object-oriented classification (B) land use/cover maps of downtown Puntarenas, Costa Rica
See this image and copyright information in PMC

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