Table 6.
Animal health from arrival to 3 weeks.
| Trial | TxGroup | n | ADG (95% CI) (kg) | Animals treated n (%)# | BRD morbidity n (%)# | Crude mortality n (%) |
|---|---|---|---|---|---|---|
| Fall 2019 | META | 41 | 1.48 (1.20–1.77)d | 11 (27) | 9 (22) | 0 (0) |
| NO META | 41 | 1.00 (0.66–1.30)e | 9 (22) | 7 (17) | 0 (0) | |
| All | 82 | 1.21 (0.83–1.65)j | 20 (24) | 16 (20) | 0 (0) | |
| Fall 2020 | META | 42 | 0.54 (0.22–1.08)f | 6 (19) | 6 (14) | 1 (2) |
| NO META | 41 | 0.22 (−0.22–0.70)g | 11 (27) | 10 (24) | 2 (5) | |
| All | 83 | 0.43 (−0.11–0.97)k | 17 (20) | 16 (19) | 3 (4) | |
| Spring 2021 | META | 42 | 0.88 (0.34–1.27) | 5 (10)m | 4 (10)q | 2 (5) |
| NO META | 40 | 0.69 (0.22–1.37) | 18 (42)n | 17 (44)r | 4 (10) | |
| All | 82 | 0.83 (0.26–1.34)l | 23 (26) | 21 (26) | 6 (7) | |
| Fall 2021 | META | 42 | 1.02 (0.57–1.49)h | 2 (2)o | 1 (2)s | 0 (0) |
| NO META | 42 | 0.78 (−0.02–1.13)i | 12 (29)p | 12 (29)t | 1 (2) | |
| All | 84 | 0.91 (0.34–1.23)l | 14 (16) | 13 (16) | 1 (1) | |
| Overall | META | 167 | 1.02 (0.43–1.49) | 24 (15) | 20 (12) | 3 (2) |
| NO META | 164 | 0.70 (0.16–1.18) | 50 (29) | 46 (28) | 7 (4) | |
| All | 331 | 0.89 (0.30–1.34)*a | 74 (22)*b | 66 (20)*c | 10 (3) |
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 = 0.0002; b, χ2 test, p = 0.0007; c, χ2 test, p = 0.004). 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; m-p and q-t, 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). Percentages represent percent of animals. #There was a significant difference between animals treated with antimicrobials and animals treated for BRD (McNemar’s χ2 Test, p = 0.01). 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.