Figure 2. Phylogenetic relationships among tickborne flaviviruses on the basis of a 575-bp fragment of the envelope gene. Distance analysis omitting third position nucleotides. Branch numbers are bootstrap confidence estimates on the basis of 500 replicates. GenBank accession numbers in parentheses. LI = Louping Ill; SSE = Spanish sheep encephalitis; TSE = Turkish sheep encephalitis; GGE = Greek goat encephalitis; TBE-West = Western subtype tickborne encephalitis (Central European encephalitis); OHF = Omsk hemorrhagic fever; TBE-East = Eastern subtype tickborne encephalitis (Russian spring-summer encephalitis); KFD = Kyasanur Forest disease; POW = Powassan encephalitis; DTV = deer tick virus; SRE = Saumarez Reef virus; TYU = Tyuleniy virus; YF = yellow fever.