Table 2. Comparison of clinical symptoms of cows with acute Escherichia coli mastitis between non-survivors and survivors.
| Clinical symptom | Days after onset | Non-survivors | Survivors |
|---|---|---|---|
| %a) (N1 / N2) | %a) (N1 / N2) | ||
| Dysstasia | 1 | 71 (5/7)* | 0 (0/17) |
| 2 | 100 (7/7)* | 0 (0/17) | |
| 3 | 83 (5/6)* | 0 (0/12) | |
| Cool extremity | 1 | 86 (6/7) | 59 (10/17) |
| 2 | 71 (5/7) | 41 (7/17) | |
| 3 | 17 (1/6) | 0 (0/12) | |
| Diarrhea | 1 | 29 (2/7) | 18 (3/17) |
| 2 | 29 (2/7) | 24 (4/17) | |
| 3 | 0 (0/6) | 8 (1/12) |
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 each clinical symptom (N1)/ the number of observed cows (N2). *Significantly different from that of survivors (P<0.05).