Figure 2. Maximum-likelihood phylogenetic tree of relationship between various tick-borne encephalitis virus (TBEV) strains isolated from rodents, insectivores, and ticks, Kyrgyzstan, 2007 and 2009. Tree is based on partial sequencing of the envelope protein (from Cys3 to Gly286). Strain names are followed by GenBank accession numbers. The strain from Ala-Archa (KY09_HM641235) is most closely related to strains from Novosibirsk (TBEV 1467 and Z6). This strain was isolated from an Ixodes persulcatus tick pool, representative of 5 other positive tick pools, and from liver samples from 2 Apodemus pallipes mice (sequence analysis of other samples not shown). Scale bar indicates nucleotide substitutions per site.