Table 4.
Distribution of herds according to number of seropositive animals, based on serum samples from three calves per herd in 118 (Sample 1) and 109 (Sample 2) Swedish dairy herds
| Virus | Number of herds (%b) with one, two and three seropositive out of three sampled animals |
|||
|---|---|---|---|---|
| 1/3 | 2/3 | 3/3 | ||
| Sample 1 | BRSV (n = 43) | 10 (23) | 3 (7) | 30 (70) |
| PIV-3 (n = 66) | 7 (11) | 14 (21) | 45 (68) | |
| BCoV (n = 45) | 7 (16) | 1 (2) | 37 (82) | |
| BVDV (n = 15) | 7 (47) | 1 (7) | 7 (47) | |
| Sample 2a | BRSV (n = 56) | 5 (9) | 6 (11) | 45 (80) |
| PIV-3 (n = 76) | 4 (5) | 9 (12) | 63 (83) | |
| BCoV (n = 72) | 0 (0) | 2 (3) | 70 (97) | |
| BVDV (n = 15) | 4 (27) | 2 (13) | 9 (60) | |
a
Only herds with three sampled animals are included.
b
Percentage out of total number of herds with at least one animal seropositive for respective virus.