Table 2. Risk factors for infection with Toxoplasma gondii strains consistent with Type X in domestic and wild terrestrial carnivores.

Model Numbera: dataset (No. of carnivores included)b	Risk Factor (reference category)	Sample size	Adjusted Odds Ratio	95% Confidence Interval	P-value
1: B1 allele typec	Carnivore group
(n = 85)	(Feral cat)	49	1.0	-	-
	Wild felid	21	4.9	(1.3–18.5)	0.02*d
	Wild canid	15	1.1	(0.2–5.5)	0.90
	Predominant land use
	(Developed)	54	1.0	-	-
	Undeveloped	25	6.0	(1.6–23.0)	<0.01*
2: Multi-locus genotypese	Carnivore group
(n = 59)	(Feral cat)	32	1.0	-	-
	Wild felid	14	13.7	(1.3–146.8)	0.03*
	Wild canid	13	0.5	(0.1–4.9)	0.54
	Predominant land use
	(Developed)	35	1.0	-	-
	Undeveloped	20	21.9	(2.3–250.7)	<0.01*

^aRisk factors were identified using multivariable logistic regression models.

^bCarnivores were sampled in central coastal California from 2006–2009.

^c Toxoplasma gondii type classified based on the allele present at the B1 locus. Spatial data were missing for 6 of the 85 carnivores in this model.

^d*  =  statistically significant risk factor for Type X infection, α = 0.05.

^e Toxoplasma gondii genotypes classified based on the allele present at the B1 locus and sequence data for at least one single copy locus. Carnivores with RFLP data only or sequence data for only B1 were excluded. Spatial data were missing for 4 of the 59 carnivores in this model.