TABLE 2.

The nucleotide differences within the 5′UTRs between five JEV genotypes.

No.	Positions of mutation	Standard Strain	Genotypes
		Nakayama	I	II	III	IV	V
1	28	G					A(3/3)
2	37	C		T(1/1)		T(1/1)
3	44	A				G(1/1)
4	45	A					G(3/3)
5	50	A				C(1/1)
6	79	T				C(1/1)
7	83	G				A(1/1)
8	92	–	A(76/78)
9	93	T	C(77/78)	C(1/1)			A(3/3)

A, adenine; G, guanine; C, cytosine; T, thymine. “–” indicates missing nucleotides. I-V indicate genotype I to genotype V of JEVs. In parentheses, each denominator indicates the total number of the JEV strains of each genotype while the numerators indicate the number of the mutated JEV strains.