Figure 1.

Bayesian maximum clade credibility (MCC) tree of VSBV-1 based on complete coding sequences showing the spread of the virus between different private holdings and zoos. Branches are coloured by the host and represent the transitions between different host species for the virus and the host of the common ancestor of all VSBV-1 strains, and the circle at the nodes the most probable host species of their descendant nodes (see colour codes). Spill-over infections to humans are shown in red. Human cases B and C are not included, as no complete virus genomes were available. Virus infections in zoos are shown in shaded areas. Statistical support of grouping from Bayesian posterior probabilities (clade credibility ≥90%) is indicated with an asterisk. Taxon information includes GenBank accession number, sample designation, host, year of detection and location of origin. Time in years is reported in the axis below the tree.