Table 5 Milk quality and quantity on farms with different levels of bTB prevalence
Mean ± SD | |||||||
|---|---|---|---|---|---|---|---|
Prevalence level | Milk yield (kg/day) | Fat content (%) | Milk protein percentage (%) | Lactose content (%) | Total solids percentage (%) | SCC (× 1000 cell/mL) | Urea nitrogen content(%) |
Low | 25.4 ± 22.8 (24.4, 26.3) | 3.5 ± 1.9 (3.4, 3.6) | 3.3 ± 0.6 (3.3, 3.4) | 5.0 ± 0.5 (5.00, 5.04) | 12.4 ± 2.1 (12.4, 12.5) | 177.6 ± 1085.8 (132.3, 222.9) | 13.4 ± 4.6 (13.3, 13.6) |
High | 21.9 ± 16.4 (21.3, 22.4) | 3.6 ± 2.4 (3.6, 3.7) | 3.5 ± 1.0 (3.45, 3.51) | 5.0 ± 0.7 (4.97, 5.02) | 12.6 ± 2.8 (12.5, 12.7) | 475.8 ± 2514.6 (392.3, 559.4) | 14.3 ± 27.2 (13.4, 15.2) |
p value | < 0.01 | 0.07 | < 0.01 | 0.06 | 0.01 | < 0.01 | 0.14 |