Table 2 Numbers (n) and percentages (%) of Streptococcus dysgalactiae and Streptococcus uberis isolates from cases of veterinary-treated clinical mastitis in cows of different breeds, parities, and stages of lactation, occurring in different seasons and geographic regions of Sweden
Variable | Class | S. dysgalactiae, n (%) | S. uberis, n (%) |
|---|---|---|---|
Breed1 | SR | 67 (49.6) | 38 (36.9) |
SH | 62 (45.9) | 58 (56.3) | |
Other | 6 (4.4) | 7 (6.8) | |
Parity | First | 56 (41.5) | 42 (40.8) |
Second | 30 (22.2) | 22 (21.4) | |
Third | 21 (15.6) | 18 (17.5) | |
Fourth or higher | 28 (20.7) | 21 (20.4) | |
Stage of lactation | <30 days postpartum | 68 (50.4) | 44 (42.3) |
≥30 days postpartum | 67 (49.6) | 59 (57.3) | |
Season | Early housing2 | 48 (35.6) | 43 (41.8) |
Late housing3 | 47 (34.8) | 23 (22.3) | |
Pasture4 | 40 (29.6) | 37 (35.9) | |
Region | Southern Sweden | 91 (67.4) | 59 (57.3) |
Eastern Sweden | 26 (19.3) | 21 (20.4) | |
Northern Sweden | 18 (13.3) | 23 (22.3) |