Landscape fragmentation and Ebola outbreaks.
Affiliation: Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil.Show MeSH
Mentions: The cities of Guéckédou and Macenta (Guinea) are fragmented landscapes containinganthropogenic environment, i.e., urban plus rural areas and forest patches (Figure). Anthropogenic environment represents 50-60% ofthe total landscape area (100 km2). Edge density between anthropogenicenvironment and forest patches is 10-12 times higher than landscapes without fragmentation,which makes possible human density increase between anthropogenic and forest habitats.Landscape fragmentation can have two roles in the Ebola transmission dynamics: (i) serve asepidemiological corridors in where pathogen-carrier reservoirs can maintain and spreadzoonotic cycles and (ii) make a frontier of contact between forest fringes andanthropogenic environment. The former mechanism can be responsible to increase variabilityof genetic pools of the pathogen within the zoonotic Ebola transmission cycle, whereas thelatter is the cause of contact between humans and the wild pathogen. These mechanisms mayultimately be linked to the mutant Ebola virus that infect humans and is responsible forthe 2014 Ebola outbreak. Could therefore these mechanisms be inferred as determinants ofEbola outbreaks in the future?
Affiliation: Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil.