Mycobacterium avium Subspecies paratuberculosis and Bovine Leukemia Virus Seroprevalence and Associated Risk Factors in Commercial Dairy and Beef Cattle in Northern and Northeastern China

Table 4

Multivariate risk factors analysis associated with herd-level prevalence of Mycobacterium avium subspecies paratuberculosis (MAP) and bovine leukemia virus (BLV) in commercial dairy and beef farms in northern and northeastern China.

Agents	Variables	Adjusted odds ratio	95% confidence interval	value
MAP	Herd size
	Small (50–100)	Reference
	Medium (100–150)	0.858	0.292–2.522	0.780
	Large (>150)	4.181	1.206–14.490	0.019
BLV	Herd size
	Small (50–100)	Reference
	Medium (100–150)	0.825	0.263–2.584	0.741
	Large (>150)	6.286	1.777–22.240	0.002
	Presence of cattle introduced from other farms
	No	Reference
	Yes	2.740	1.070–7.016	0.041

The variables included were those with a obtained in the bivariate analysis.
Adjusted by region and the rest of characteristics included in this table.