Table 2.

Farm-level factors associated with number of animals seropositive to Toxoplasma gondii in 33 dairy sheep flocks: results of a negative binomial regression model

Variable	Level	Count ratio	95%CI(CR)	P-value
Size of flock	<300	1*	–	–
	300-400	0.83	0.55, 1.26	0.377
	>400	0.62	0.41, 0.95	0.028
Access of stray cats to animals’ water	No	1*	–	–
	Yes	1.54	1.05, 2.26	0.027
ln(number tested)	(exposure)	–	–	–

^* Reference level.