Table 1.

A review of Marek's disease virus serotypes and their features.

			Genome size	Annotated	vTR	vIl8	pp38	Meq	Telomeric
Serotype	Strain	Status	(kb)g	ORFs*	geneh,i,j	gene	gene	oncogene	repeatsk
1	GAa	Virulent	174	103	+	+	+	+	+
1	Md5b	Very virulent	177.8	103	+	+	+	+	+
1	Md11c,d	Very virulent	178	99	+	+	+	+	+
1	Rispens/CV1988d	Attenuated	178.3	102	+	+/NF	+/NF	+/NF	+
2	SB-1e	Non oncogenic	165.9	75	−	+/NF	+/NF	−	+
3	HVTf	Non oncogenic	160	75	−	−	−	−	+

Open reading frames (ORFs), viral telomerase RNA (vTR), viral interleukin-8 (vIL-8), phosphoprotein 38 (pp38), + (plus) = present; − (minus) = absent; +/NF = present but non-functional.

^aLee et al., 2000a,b; ^bTulman et al., 2000; ^cNiikura et al., 2006; ^dSpatz et al., 2007; ^eSpatz and Schat, 2011; ^fKingham et al., 2001; ^gWilson and Coussens, 1991; ^hFragnet et al., 2003; ⁱFragnet et al., 2005; ^jTrapp et al., 2006; ^kKishi et al., 1988.