Figure 1.
Distribution of rodent species.
Necromys lasiurus (circles) and Oligoryzomys nigripes (squares). The access area "M" is approximated by buffers of 400 km. Distribution of hantavirus-infected rodents (N. lasiurus, red triangles and O. nigripes, yellow stars) is also shown.
Figure 2.
Ecological niche models projected as potential distributions for rodent reservoirs of hantavirus in Brazil (gray shading).
Necromys lasiurus (left) and Oligoryzomys nigripes (right). Areas identified as suitable based on all occurrence records are shown in pale gray, whereas areas identified as suitable based only on infected rodents database are shown for N. lasiurus (red) and O. nigripes (yellow). Bold lines indicate the range of the Cerrado and Atlantic Forest. Cases of human infections with hantavirus in Cerrado (circles) and Atlantic Forest (squares) were superimposed on the models.
Figure 3.
Visualization of niches of hantavirus in rodents and humans.
White points indicate environments in the study area (background). Ellipsoids are the representation of niches for hantavirus in N. lasiurus (red), O. nigripes (blue), and human cases (yellow). Environmental space based on components 1 to 3 from a principal component analysis (PCA) of climatic and NDVI variables. Note that, while the ellipsoids for the different species do show some difference, so also do the environments represented within each species’ M; here, the results of the background similarity test become key.