title: Malaria risk on the Amazon frontier.
abstract: Frontier malaria is a biological, ecological, and sociodemographic phenomenon operating over time at three spatial scales (micro/individual, community, and state and national). We explicate these linkages by integrating data from remote sensing surveys, ground-level surveys and ethnographic appraisal, focusing on the Machadinho settlement project in Rondônia, Brazil. Spatially explicit analyses reveal that the early stages of frontier settlement are dominated by environmental risks, consequential to ecosystem transformations that promote larval habitats of Anopheles darlingi. With the advance of forest clearance and the establishment of agriculture, ranching, and urban development, malaria transmission is substantially reduced, and risks of new infection are largely driven by human behavioral factors. Malaria mitigation strategies for frontier settlements require a combination of preventive and curative methods and close collaboration between the health and agricultural sectors. Of fundamental importance is matching the agricultural potential of specific plots to the economic and technical capacities of new migrants. Equally important is providing an effective agricultural extension service.
authors.affiliation: Department of Geography, University of South Carolina, Columbia, SC 29208, USA. mcaldas@sc.edu
authors.forename: Marcia Caldas
authors.initials: MC
authors.lastname: de Castro
authors.forename: Roberto L
authors.initials: RL
authors.lastname: Monte-Mór
authors.forename: Diana O
authors.initials: DO
authors.lastname: Sawyer
authors.forename: Burton H
authors.initials: BH
authors.lastname: Singer
mesh_terms: D000818:Animals; D000852:Anopheles; D001938:Brazil; D003247:Conservation of Natural Resources; D004641:Emigration and Immigration; D004781:Environmental Exposure; D004784:Environmental Monitoring; D062665:Epidemiological Monitoring; D006801:Humans; D008288:Malaria / Q000453:epidemiology*; D012306:Risk; D012424:Rural Population