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

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

Herd type Responses Median (IQR) of non zero responses (%) Range of all responses (%) Pa
  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
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
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
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
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
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
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
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
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  
  1. aWilcoxon rank-sum test based on all responses.