Characterization of a Highly Virulent Noncytopathic Bovine Viral Diarrhea Virus 2b Isolate Detected in Cattle in Inner Mongolia, China

Table 2

Viral isolation from blood samples or nasal swabs.

Group	Animals	Positive (%)
		Baseline	Day 2	Day 4	Day 6	Day 8	Day 10	Day 12	Day 14
Cattle-nasal swabs (ns)	3	0	100	100	100	100	66.67	0	0
Cattle-blood samples (bs)	3	0	66.67	100	100	100	100	100	33.33
Positive control-cattle (ns)	3	0	33.33	100	100	66.67	0	0	0
Positive control-cattle (bs)	3	0	0	66.67	100	100	66.67	33.33	0
Guinea pigs-nasal swabs	4	0	50	100	75	50	25	0	0
Guinea pigs-blood samples	4	0	75	100	100	100	25	25	0
Positive control-Guinea pigs (ns)	4	0	50	100	100	50	0	0	0
Positive control-Guinea pigs (bs)	4	0	50	100	75	25	25	0	0
Negative control-cattle (ns/bs)	3/3	0	0	0	0	0	0	0	0
Negative control-Guinea pigs (ns/bs)	4/4	0	0	0	0	0	0	0	0