Table 1. Homology between the nucleotide acid sequences of prototype strains for three subtypes of tick-borne encephalitis virus, Omsk hemorrhagic fever virus, and hemorrhagic tick-borne encephalitis virus^a.

Viruses	European subtype (subtype 1) (%)		Far Eastern subtype (subtype 2) (%)			Siberian subtype (subtype 3) (%)			Omsk hemorrhagic fever virus
	Neud	KemI	Sofiin	Oshima1	Crimea	Botsad	Eltsovka	Lesopark	Omskhf
Neud	100.00	98.06	81.94	82.78	82.50	84.72	83.89	84.72	80.28
KemI	98.06	100.00	81.39	82.50	81.94	83.89	83.06	83.89	80.00
Sofiin	81.94	81.39	100.00	95.83	94.44	85.28	84.72	85.28	77.78
Oshima1	82.78	82.50	95.83	100.00	97.50	85.83	85.28	85.83	77.22
Crimea	82.50	83.06	94.44	97.50	100.00	86.67	85.56	86.67	78.33
Koltsovo 1	81.67	81.11	99.72	96.11	94.72	85.00	84.44	85.00	78.06
Koltsovo 19	80.28	79.44	92.50	93.61	93.06	83.33	82.22	83.33	76.67
Koltsovo 23	78.61	78.06	91.39	92.22	91.94	82.50	81.39	82.50	75.00
Koltsovo 29	80.83	80.00	92.78	93.89	93.33	83.61	82.50	83.61	77.50
Botsad	84.72	83.89	85.28	85.83	86.67	100.00	97.78	98.89	78.89
Eltsovka	83.89	81.94	84.72	85.28	85.56	97.78	100.00	97.78	78.06
Lesopark	84.72	83.89	85.28	85.83	86.67	98.89	97.78	100.00	78.06
Omskhf	80.28	80.00	77.78	77.22	78.33	78.89	78.06	78.06	100.00

^aViruses shown in boldface are the hemorrhagic variants of tick-borne encephalitis virus.