The epidemiological network of B. burgdorferi (BBG) as visualised using the ForceAtlas2 algorithm at the level of the genera of vertebrates. The clusters are randomly coloured. Each cluster comprises a group of species that are more frequently reported to interact with each other, than with other species. The circles (nodes) represent organisms (species of pathogens and ticks or genera of vertebrates), and the lines with the same colour as a cluster represent interactions among the organisms of the cluster. The size of each node is proportional to its betweenness centrality, and the size of the label is proportional to the PageRank of the node. The width of each link is proportional to the weighted number of interactions between each pair of nodes. Although the network is directed, links lack arrows for improving visualization. (PDF 83 kb)