Perceptions of veterinarians and producers concerning Johne’s disease prevalence and control in US beef cow-calf operations

Table 3 Burden of Mycobacterium avium subspecies paratuberculosis infection in cow-calf operations reported by US beef cow-calf producers

Herd type	Responses		Median (IQR) of non zero responses (%)	Range of all responses (%)	P^a
	Total	Non-zeros
Prevalence
Seedstock	86	17	2 (1 to 4)	0 to 10	0.381
Non-seedstock	69	17	3 (1.5 to 5)	0 to 10	0.381
Closed herds	55	9	1 (0.5 to 4)	0 to 8	0.184
Open herds	90	22	2.8 (1.5 to 5)	0 to 10	0.184
Enrolled herds	114	23	2 (1 to 4)	0 to 8	0.287
Not-enrolled herds	41	11	4 (1 to 10)	0 to 10	0.287
Clinical animals
Seedstock	53	10	0.010 (0.006 to 0.017)	0 to 0.04	0.045
Non-seedstock	44	16	0.013 (0.005 to 0.030)	0 to 0.2	0.045
Closed herds	32	8	0.007 (0.006 to 0.08)	0 to 0.031	0.883
Open herds	59	15	0.014 (0.005 to 0.033)	0 to 0.2	0.883
Enrolled herds	67	13	0.011 (0.006 to 0.016)	0 to 0.111	0.011
Not-enrolled herds	30	13	0.015 (0.006 to 0.029)	0 to 0.2	0.011
Test positive animals
Seedstock	80	13	1.5 (1 to 3)	0 to 100	0.005
Non-seedstock	55	21	2 (1 to 5)	0 to 100	0.005
Closed herds	49	10	1.1 (1 to 5.5)	0 to 100	0.300
Open herds	78	22	2 (0.8 to 5)	0 to 100	0.300
Enrolled herds	105	18	1.75 (1 to 4)	0 to 100	< 0.001
Not-enrolled herds	30	16	1.8 (0.9 to 5.25)	0 to 100

ISSN: 1746-6148