Complete nucleotide sequence of the S-segment and partial sequences of M- and L-segments (981 and 1005 nucleotide respectively) have been determined in 20 strains of California encephalitis serocomplex, isolated in Yakitiya, Sakhalin, and Kamchatka. The phylogenetic analysis ofgenomic S-, M-, and L-segments showed that all 20 strains are related to Khatanga virus (La Cross subtype of California encephalitis serotype). Eight strains belong to group 2 of Khatanga virus while the remaining 12 make up a new (third) genetic group of this virus having original S- and M-segments and L-segment similar to that of the second group.
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