Apparent Prevalence of Beef Carcasses Contaminated with Mycobacterium avium subsp. paratuberculosis Sampled from Danish Slaughter Cattle

Table 3

Odds ratios (OR) and 95% confidence interval in parenthesis resulting from univariable logistic regression of risk factors for occurrence of Mycobacterium avium subsp. paratuberculosis DNA in beef carcasses.

Variable	Including samples with fecal contamination			Excluding samples with fecal contamination
	PCR threshold cycle value			PCR threshold cycle value
	36	37	38	36	37	38
Old
<2 years	1	1	1	1**	1**	1**
≥2 years	2.7 (1.0–9.5)	2.0 (0.9–5.2)	1.9 (1.0–4.1)	10.1 (1.0–196.3)	3.4 (1.2–11.8)	2.5 (1.1–6.0)
Herd type
Beef	1	1	1	1	1	1
Dairy	3.2 (0.9–20.7)	2.8 (1.0–12.1)	1.6 (0.7–4.2)	2.5 (0.7–16.3)	2.2 (0.7–9.6)	1.3 (0.5–3.3)
Veal	0.8 (0.0–8.3)	1.6 (0.3–8.9)	1.1 (0.3–3.7)	0.7 (0.0–7.5)	0.9 (0.1–5.9)	0.8 (0.0–2.8)
Breed group
Beef	1	1	1	1	1**	1
Dairy	3.9 (0.8–71.1)	5.8 (1.2–104.4)	1.9 (0.7–6.6)	3.2 (0.6–59.2)	4.7 (1.00–85.7)	1.5 (0.6–5.1)
Cross	1.2 (0.1–31.0)	1.2 (0.1–31.0)	0.9 (0.2–4.2)	1.4 (0.1–35.7)	1.4 (0.1–35.7)	1.2 (0.1–31.0)
Fat code
≥3	1	1	1	1	1	1
2	1.5 (0.6–3.9)	2.2 (1.0–5.2)	1.4 (0.7–2.7)	1.4 (0.5–4.1)	1.9 (0.7–4.5)	1.1 (0.5–2.5)
1	0.4 (0.0–2.2)	1.1 (0.3–3.7)	1.8 (0.7–4.3)	0.4 (0.0–2.5)	1.2 (0.3–4.2)	1.7 (0.6–4.2)

**Significant at 𝑃≤.05.