. 2017 Feb 27;28(1):102–110. doi: 10.1007/s13337-016-0354-4

Table 3.

Association between sheep seropositivity against RSV/PI3V and production center

Antigen	Variable	Category	No. of seropositive sheep	No. of seronegative sheep	P value
RSV	Production system	Extensive	74	78	0.003*
RSV		Intensive	93	48	0.003*
PI3V		Extensive	132	19	0.017*
PI3V		Intensive	109	33	0.017*

* Statistically significant, P < 0.05