Table 4.
Summary of the Johne's disease risks identified using veterinary risk assessments carried out by AHWNI approved veterinarians from October 2020 To March 2021.
| Risk | Finding |
|---|---|
| Introduced animals to the herd in the previous 5 years. | 75 (89%) |
| Suspect Clinical Case/s. | 27 (33%) |
| Use of contractors to spread slurry. | 42 (50%) |
| Mixing of cattle with neighbouring herds. | 39 (46%) |
| Contact with sheep. | 31 (37%) |
| Colostrum from other cows with no selection on donor cow JD status. | 13 (15%) |
| Calves fed whole milk from cows with no selection on JD status. | 22 (26%) |
| Non-saleable milk fed to calves. | 17 (20%) |
| Pre-weaned calves kept in groups of 9 or more. | 13 (15%) |
| Calf exposure to adult cattle faeces. | 8 (10%) |
| Manure above hocks and on flanks and udder of more than 10% of springing cows before entering the calving area. | 8 (10%) |
| Manure above hocks and on flanks and udder of more than 10% of springing cows after entering the calving area. | 9 (11%) |
| Visible manure covering some of the calving pen. | 15 (18%) |
| Calving area used to house sick of lame cows at least every month. | 19 (23%) |
| JD high risk cows including those showing clinical signs consistent with JD allowed to calf in the same area as other cows. | 21 (25%) |
| >5% of cows calf in non-designated areas such as cubicle houses. | 5 (6%) |
| >10% of calves allowed to suckle their dam. | 5 (7%) |
| <10% of calves are removed from their dam within 30 min. | 44 (52%) |