Table 1 Summary of data used as inclusion criteria for the 4 farms in the study
Farm | Year | No. of heifers | No. of cows | Total no. of cattle | Liver condemnation (%) | BTM ELISA value (S/P%)a |
|---|---|---|---|---|---|---|
C1 | 2011 | 72.5 | 176.5 | 314 | 6.2 | – |
2012 | 65.5 | 184.5 | 303 | 21.3 | – | |
2013 | 65 | 187.5 | 315 | 30.0 | – | |
2014 | 63 | 183.5 | 312 | 18.6 | 179.3 | |
C2 | 2011 | 103 | 135 | 292 | 8.3 | – |
2012 | 98.5 | 145 | 300 | 11.9 | – | |
2013 | 105.5 | 144 | 314 | 16.1 | – | |
2014 | 111 | 149 | 331 | 19.4 | 181.2 | |
O1 | 2011 | 145 | 172 | 367 | 2.6 | – |
2012 | 141 | 168 | 362 | 7.6 | – | |
2013 | 124 | 174.5 | 354 | 33.3 | – | |
2014 | 172 | 183 | 425 | 23.3 | 221.4 | |
O2 | 2011 | 90.5 | 113.5 | 251 | 18.1 | – |
2012 | 97.5 | 124 | 275 | 32.6 | – | |
2013 | 111 | 131.5 | 282 | 27.7 | – | |
2014 | 113 | 133.5 | 285 | 38.1 | 206.9 |