Table 4.

Number of SNPs present and MDV variants identified for each marker region.

Marker	Amplicon size	Number of SNPs previously identified among the ten fully sequenced MDV-1 strains	Number of SNPs identified in our samples	Number of variants identified in our samples
M1: C-C	765	11	1 (0 unique to our samples)	2: variant 1 = RB-1B, Md5, and 648A; variant 2 is unique.
M2: LORF11	584	7	2 (1 unique to our samples)	3: variant 1 = Rispens and strain 814 (both vaccine strains); variant 2 is unique; variant 3 = RB-1B, Md5, and 648A
M3: meq	1251	18	16 (7 unique to our samples)	5: all five variants unique to the full genome meq sequences. Variant 1 = 595, 549, L, RL, TK, and X (USA strains); variant 5 = 637 and 617A (USA strains); variants 2, 3, and 4 are unique among the 136+ meq sequences present in the databases
M4: ICP4 (prox.)	849	8	4 (4 unique to our samples)	3: variant 1 is unique; variant 2 = Md5 and Rispens; variant 3 is unique
M5: ICP4 (dist.)	482	9	5 (1 unique to our samples)	6: variants 1, 2, 4, and 5 are unique; variant 3 = RB-1B and Md5; variant 6 = Rispens, LMS, GA, and strain 814
M6: pp38	824	2	1 (0 unique to our samples)	2: variant 1 = LMS, GX0101, and CU-2; variant 2 = 648A, RB-1B, GA, Md5
M7: UL36	401	2	1 (0 unique to our samples)	2: variant 1 = 648A; variant 2 = other nine fully sequenced isolates
M8: UL43	340	6	1 (0 unique to our samples)	2: variant 1 = 648A; variant 2 = other nine fully sequenced isolates