Extended Genetic Diversity of Bovine Viral Diarrhea Virus and Frequency of Genotypes and Subtypes in Cattle in Italy between 1995 and 2013

Table 1

Frequency of BVDV genotypes and subtypes in Italy.

Genotype/subtype	Total sequences number (%)	Herd* number (%)	Years	Geographic origin**	Published/total sequences (𝑛)	References
BVDV-1a	9 (2.4)	9 (3.4)	2000–2009	NCI	3/9	[20]
BVDV-1b	149 (40.2)	115 (43.9)	1995–2013	NCSI	52/149	[20–24]
BVDV-1c	1 (0.3)	1 (0.4)	2010	S	0/1	Not published
BVDV-1d	20 (5.4)	16 (6.1)	1995–2010	NCS	5/20	[22, 23]
BVDV-1e	126 (34)	72 (27.5)	1996–2013	NCSI	22/126	[20–24]
BVDV-1f	28 (7.5)	17 (6.5)	1999–2012	N	1/28	[23]
BVDV-1g	4 (1.1)	4 (1.5)	2002–2010	NS	1/4	[20]
BVDV-1h	15 (4.0)	14 (5.3)	1996–2011	NCI	3/15	[21–23]
BVDV-1j	1 (0.3)	1 (0.4)	1995	N	1/1	[22]
BVDV-1k	3 (0.8)	3 (1.1)	2001–2011	NS	0/3	Not published
BVDV-1l	1 (0.3)	1 (0.4)	2007	C	0/1	Not published
BVDV-2	10 (2.7)	7 (2.7)	1995–2004	NS	7/10	[20, 22]
HoBi-like	4 (1.1)	2 (0.8)	2007–2011	S	4/4	[18, 19, 25, 26]

∗Herds with different BVDV genotypes or subtypes are counted for each virus type.
∗∗N: northern Italy, C: central Italy, S: southern Italy, and I: Islands.