Table 3. Comparison of rectal temperature, heart rate and respiratory frequency of cows with acute Escherichia coli mastitis between non-survivors and survivors.
| Clinical signs | Days after onset | Non-survivors | Survivors | ||
|---|---|---|---|---|---|
| n | n | ||||
| Rectal temperature (°C) | 1 | 7 | 39.4 ± 0.4* | 17 | 39.9 ± 0.9 |
| 2 | 7 | 38.7 ± 0.7 | 16 | 39.1 ± 0.6c) | |
| 3 | 6 | 39.0 ± 0.6 | 12 | 39.0 ± 0.5c) | |
| Heart rate (beat/min) | 1 | 7 | 109.1 ± 11.0 | 17 | 104.9 ± 17.7 |
| 2 | 6 | 94.7 ± 19.2 | 16 | 96.9 ± 10.0 | |
| 3 | 5 | 93.6 ± 15.1 | 12 | 99.2 ± 13.4 | |
| Respiration frequency (breath/min) | 1 | 7 | 49.7 ± 10.0 | 17 | 44.9 ± 12.8 |
| 2 | 7 | 44.3 ± 16.2 | 15 | 43.2 ± 12.4 | |
| 3 | 6 | 50.0 ± 15.1 | 12 | 42.9 ± 12.2 | |
| Proportion of cows | 1 | 7 | 86a) (6/7)b) | 17 | 94a) (16/17)b) |
| showing 2 or more | 2 | 7 | 86a) (6/7)b) | 17 | 71a) (12/17)b) |
| clinical signs a) | 3 | 6 | 83a) (5/6)b) | 12 | 42a) (5/12)b) |
Data were expressed as mean ± SD. n: Number of cows. Non-survivors comprised died or euthanized cows, and survivors were defined as survived or recovered cows from acute E. coli mastitis. a) The proportion (%) was calculated as the number of cows showing 2 or more of the following signs: rectal temperature >40°C, heart rate >120 beats/min, respiratory frequency >30 breaths/min and white blood cell counts <5,000 /µl. b) The values in the parentheses indicate the number of cows showing clinical signs / the number of observed cows. c) Values were significantly different from that of day 1 by survivors or non-survivors (P<0.05). *Significantly different from that of survivors (P<0.05).