Geospatial tools for the identification of a malaria corridor in Estado Sucre, a Venezuelan north-eastern state

Abstract

Abstract. Landscape ecology research relies on frameworks based on geographical information systems (GIS), geostatistics and spatial-feature relationships. With regard to health, the approach consists of systems analysis using a set of powerful tools aimed at the reduction of community vulnerability through improved public policies. The north-oriental malaria focus, one of five such foci in Venezuela, situated in the north-eastern part of the Estado Sucre state, unites several social and environmental features and functions as an epidemiological corridor, i.e. an endemic zone characterised by permanent interaction between the mosquito vector and the human host allowing a continuous persistence of the malaria lifecycle. A GIS was developed based on official cartography with thematic overlays depicting malaria distribution, socio-economic conditions, basic environmental information and specific features associated with the natural wetlands present in the area. Generally, malaria foci are continuously active but when the malaria situation was modelled in the north-oriental focus, a differential, spatio-temporal distribution pattern situation was found, i.e. a situation oscillating between very active and dormant transmission. This pattern was displayed by spatial and statistical analysis based on the model generated in this study and the results were confirmed by municipal and county malaria records. Control of malaria, keeping the incidence at a permanently low level within the regional population, should be possible if these results are taken into account when designing and implementing epidemiological surveillance policies.

Mapping malaria in municipalities of the Coffee Triangle region of Colombia using Geographic Information Systems (GIS)

“…Until now, studies using GIS in malaria in Latin America have been published mostly from Brazil [22][23][24][25] and Venezuela [26]. There are few previous reports specifically from Colombia [11,22].…”

Spatial and spatio-temporal analysis of malaria in the state of Acre, western Amazon, Brazil

“…As the malaria risk is also unevenly distributed in the endemic areas (Confalonieri, 2005), geographic information systems (GIS) are useful for spatial analysis because they allow surveying and understanding the epidemiological behaviour of emerging and re-emerging infectious diseases (Ceccato et al, 2005;Machault et al, 2011;Delgado-Petrocelli et al, 2011;Franke et al, 2015 ).…”

A review of spatial technologies with applications for malaria transmission modelling and control in Africa

“…These techniques can be successfully used only in conjunction with a thorough understanding of environmental and epidemiologic processes of malaria transmission. As suggested by Delgado-Petrocelli et al (2011), using an integrated spatial technology including ecological, climatic and epidemiological data, the relationship between geographic features, human activities, and malaria prevalence/incidence can be investigated. However, there is still no operational monitoring system available which, for example, allows monthly mapping of environmental suitability for malaria transmission throughout Africa.…”