Table 8.
Week 10 health data.
| Trial | TxGroup | n | Median-ADG (95% CI) (kg) | Animals treated n (%)# | BRD Morbidity n (%)# | Mortality n (%) |
|---|---|---|---|---|---|---|
| Fall 2019 | META | 41 | 0.96 (0.87–1.17)d | 11 (27) | 9 (22) | 0 (0) |
| NO META | 41 | 0.88 (0.71–0.95)e | 11 (27) | 9 (22) | 0 (0) | |
| All | 82 | 0.92 (0.79–1.08)j | 22 (27) | 18 (22) | 0 (0) | |
| Fall 2020 | META | 42 | 0.82 (0.64–0.92)f | 9 (21) | 7 (17) | 2 (5) |
| NO META | 41 | 0.65 (0.42–0.86)g | 12 (29) | 10 (24) | 2 (5) | |
| All | 84 | 0.78 (0.49–0.91)k | 21 (25) | 17 (20) | 4 (5) | |
| Spring 2021 | META | 42 | 0.76 (0.61–0.97) | 5 (12)m | 4 (10)o | 4 (10) |
| NO META | 40 | 0.73 (0.52–0.88) | 18 (45)n | 17 (43)p | 7 (18) | |
| All | 82 | 0.76 (0.53–0.94)k | 23 (28) | 21 (26) | 11 (13) | |
| Fall 2021 | META | 42 | 0.45 (0.33–0.71)h | 6 (14) | 4 (10)q | 0 (0) |
| NO META | 42 | 0.38 (0.19–0.57)i | 14 (33) | 14 (33)r | 2 (5) | |
| All | 84 | 0.44 (0.25–0.62)l | 20 (24) | 18 (21) | 2 (2) | |
| Overall | META | 167 | 0.80 (0.51–0.97) | 31 (19) | 24 (14) | 6 (4) |
| NO META | 164 | 0.64 (0.44–0.89) | 55 (34) | 50 (30) | 11 (7) | |
| All | 331 | 0.74 (0.45–0.92)*a | 86 (26)*b | 74 (22)*c | 17 (5) |
An asterisk (*) in the ‘Overall’ row represents that there was an overall statistical difference between META and NO META TxGroups (a, Wilcoxon Sum Rank test, p = 0.002; b, χ2 test, p = 0.002; c, χ2 test, p = 0.0007). Values with different superscripts in the same column of the ‘META’ or ‘NO META’ rows represent a statistical difference between TxGroups within Trial (d-i, Wilcoxon Sum Rank, p ≤ 0.05; mn, op, and qr, χ2 test, p ≤ 0.05). Values with different superscripts in the same column of the ‘All’ rows represent a statistically significant difference among Trials (j-l, Kruskal Wallis Analysis of Variance on Ranks with post-hoc Dunn Test and Benjamini Hochberg Correction, p ≤ 0.05). #There was a significant difference between animals treated with antimicrobials and animals treated for BRD (McNemar’s χ2 Test, p = 0.001). Percentages represent percent of animals. TxGroup, treatment group; MH, Mannheimia haemolytica; MDR, multi-drug resistant; CI, confidence interval; ADG, average daily gain; BRD, bovine respiratory disease; META, tulathromycin metaphylaxis; NO META, no tulathromycin metaphylaxis.