Table 1.
Descriptive data for 117 calves treated with procaine benzylpenicillin (PEN), oxytetracycline (OTC), or florfenicol (FLO) for respiratory disease on farm S and H.
| PEN | OTC | FLO | PEN & OTC & FLO | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Farm | S | H | S & H | S | H | S & H | S | H | S & H | S | H | S & H | |
| No. of calves | 20 | 21 | 41 | 21 | 19 | 40 | 18 | 18 | 36 | 59 | 58 | 117 | |
| Age when treated (days) a | Mean (range) |
42.6 (16–81) |
51.2 (29–121) |
47.2 (16–121) |
43.5 (10–88) |
55.6 (25–107) |
49.6 (10–107) |
40.7 (9–77) |
53.6 (29–121) |
47.9 (9–121) |
42.4 ** (9–88) |
53.4 ** (25–121) |
48.2 (9–121) |
| Rectal temp. 0 h (°C) | Mean (range) |
39.8 (38.4–41.5) |
39.8 (38.4–41.3) |
39.8 (38.4–41.3) |
40.1 (38.8–41.4) |
39.6 (38.1–41.1) |
39.9 (38.1–41.4) |
39.9 (37.1–41.3) |
39.6 (37.5–41.0) |
39.8 (37.1–41.3) |
39.9 (37.1–41.5) |
39.7 (37.5–41.3) |
39.8 (37.1–41.5) |
| Rectal temp. 48 h (°C) | Mean (range) |
38.4 (37.4–40.1) |
38.4 (37.7–39.1) |
38.4 (37.4–40.1) |
38.3 (36.3–40.4) |
38.6 (37.5–39.9) |
38.4 (36.3–40.4) |
38.2 (37.0–39.1) |
38.3 (37.2–40.0) |
38.3 (37.0–40.0) |
38.3 (36.3–40.4) |
38.5 (37.2–40.0) |
38.4 (36.3–40.4) |
| Retreatment: | |||||||||||||
| <30 days | No. | 0 | 2 | 2 | 2 c | 0 | 2 | 5 d | 0 | 5 | 7 | 2 | 9 |
| 30–60 days | No. | 1 | 0 | 1 | 2 | 0 | 2 | 1 e | 0 | 1 | 4 | 0 | 4 |
| >60 days | No. | 3 | 0 | 3 | 1 | 0 | 1 | 2 | 0 | 2 | 6 | 0 | 6 |
| Total | No. | 4 | 2 | 6 | 4 | 0 | 5 | 6 | 0 | 8 | 17 ** | 2 ** | 19 |
| Case fatality: | |||||||||||||
| <30 days | No. | 1 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 |
| 30–60 days | No. | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| >60 days | No. | 1 (day 90) | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 |
| Total Case fatality | No | 2 | 1 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 3 |
| Age at slaughter (days) b |
Mean (range) |
540 (450–597) |
533 (482–574) |
536 (450–597) |
544 (453–612) |
526 (476–569 |
535 (453–612) |
552 (474–648) |
539 (479–588) |
545 (474–648) |
545 (450–648) |
532 (476–588) |
539 (450–648) |
| Carcass weight (kg) |
Mean (range) |
311.8 (230–369) |
326.8 (286–358) |
319.3 (230–369) |
320.7 (260–364) |
317.7 (287–356) |
319.2 (260–364) |
315.0 (276–341) |
318.1 (257–384) |
316.5 (257–384) |
316.0 (230–369) |
321.0 (257–384) |
318.4 (230–384) |
a Data for 8 calves missing (farm S: 2 PEN, 2 OTC, 4 FLO); b data for 22 calves missing (farm S: 4 PEN, 4 OTC, 5 FLO; Farm H: 4 PEN, 1 OTC, 4 FLO); c 1 calf retreated 66 days after first retreatment; d 1 calf retreated 99 days after first retreatment; e 1 calf retreated 59 days after first retreatment. Statistically significant differences between mean values indicated by ** (p < 0.01).