| |
Group/Calf
|
|---|
| |
BRSV-Snk
|
BRSV-Dk
|
|---|
|
Clinical sign
|
A1
|
A2
|
A3
|
B1
|
B2
|
B3
|
|
General state
|
1
|
1
|
1
|
0
|
1
|
0
|
|
Appetite
|
1
|
1
|
1
|
0
|
0
|
0
|
|
Abdominal dyspnea
|
2
|
2
|
2
|
2
|
2
|
2
|
|
Temperature
|
0
|
4
|
0
|
0
|
1
|
2
|
|
Respiratory rate
|
3
|
3
|
3
|
1
|
3
|
0
|
|
Lung sounds intensity
|
2
|
3
|
3
|
0
|
2
|
1
|
|
Added lung sounds
|
0
|
3
|
2
|
0
|
2
|
1
|
|
Nasal discharge
|
1
|
2
|
1
|
1
|
1
|
1
|
|
Coughing
|
2
|
2
|
2
|
0
|
2
|
0
|
|
Clinical score
|
25
|
38
|
28
|
9
|
25
|
13
|
- Six calves were experimentally infected with virulent BRSV, either passaged in vivo (BRSV-Snk, n = 3, calves A1-3), or in vitro (BRSV-Dk, n = 3, calves B1-3). Clinical signs were recorded daily for seven days, and scores calculated as described in Table 1.
