Table 3.

The genomic homology between the MLV strain and the challenged strains.

MLV	HP-PRRSV SD-YL1712		NADC30-like PRRSV SX-YL1806
Genomic region	nt%	aa%	nt%	aa%
Full-length	95.3	-	85.9	-
5′UTR	100	-	90.4	-
ORF1a	91.7	89.6	80.8	81.6
ORF1b	98.5	99	87.6	95.8
NSP1	97.6	98.4	83.2	90.1
NSP2	84.2	79.4	74.7	70
NSP3	97.4	98.3	82.5	91.8
NSP4	97.5	97.5	84.8	93.1
NSP5	98	97.6	85.5	92.4
NSP6	95.8	100	95.8	100
NSP7	98.1	97.7	89.6	93.1
NSP8	98.5	100	98.5	100
NSP9	98.4	99.2	89.7	97
NSP10	98.7	99.3	85.6	94.3
NSP11	98.2	97.8	89.8	96
NSP12	99.1	99.3	88.7	94.1
ORF2	98.4	99.1	85.6	90.1
ORF3	98.4	98.8	82.9	81.1
ORF4	97.8	96.1	85.7	87.6
ORF5	99	98.5	85.6	87
ORF6	99.4	98.3	89.5	94.3
ORF7	98.7	98.4	89	88.6
3′UTR	99.3	-	89.3	-