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BRD-scoring parameters for calves
| Clinical sign | Level | Score |
|---|---|---|
| Cough | None or induced cough | 0 |
| Spontaneous cough | 2 | |
| Nasal discharge | None | 0 |
| Any | 4 | |
| Ocular discharge | None | 0 |
| Any | 2 | |
| Ear position | Normal, ear flick or head shake | 0 |
| Ear droop or head tilt | 5 | |
| Rectal temperature ( °C) | < 39.2 | 0 |
| ≥ 39.2 | 2 | |
| Abnormal respirationa | Absent | 0 |
| Present | 2 |
aAuscultation was performed by using a stethoscope
Calves were categorized as BRD positive if their total score was ≥5 (modified Love et al. 2014)
