Dengue virus type 2 was isolated from a tourist who returned from Borneo to Australia. Phylogenetic analysis identified this virus as highly divergent and occupying a basal phylogenetic position relative to all known human and sylvatic dengue virus type 2 strains and the most divergent lineage not assigned to a new serotype.
Keywords: Australia; Borneo; DENV-2; dengue virus; dengue virus type 2; divergence; evolution; phylogeny; sylvatic cycle; traveler; viruses.