Table 2 Results of bacteriological cultures of milk samples of a) 104 quarters (66 cows) with a California Mastitis Test ≥ 4 at the initial udder health examination of 257 cows; b) 38 cases of clinical mastitis yielding 42 sampled quarters (one harboured two pathogens); and c) 107 udder quarters in 27 cows with UDS1 ≥ 4 at drying off (one cow had a blinded quarter)
From: Mastitis and related management factors in certified organic dairy herds in Sweden
| Â | Initial examination | Clinical mastitis2 | Drying off2 | |||
|---|---|---|---|---|---|---|
Culture results | N | % | N | % | N | % |
Staphylococcus aureus (of which β-lactamase prod.) | 19 (2) | 18.3 (10) | 5 (1) | 11.9 (20) | 7 (0) | 6.5 (0) |
Coagulase negative staphylococci (of which β-lactamase prod.) | 17 (5) | 16.4 (30) | 0 | 0.0 | 7 (3) | 6.5 (43) |
Streptococcus uberis | 8 | 7.7 | 3 | 7.0 | 5 | 4.7 |
Streptococcus dysgalactiae | 10 | 9.6 | 4 | 9.3 | 2 | 1.9 |
Escherichia coli | Â | Â | 8 | 18.6 | Â | Â |
Arcanobacterium pyogenes | Â | Â | 1 | 2.3 | Â | Â |
Mixed growth | 10 | 9.6 | 1 | 2.4 | Â | Â |
Negative | 40 | 38.5 | 21 | 50.0 | 86 | 80.0 |