|
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) |
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| Initial examination |
Clinical mastitis2 |
Drying off2 |
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|
|
||||||
| 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 |
8 |
18.6 |
||||
| Arcanobacterium pyogenes |
1 |
2.3 |
||||
| Mixed growth |
10 |
9.6 |
1 |
2.4 |
||
| Negative |
40 |
38.5 |
21 |
50.0 |
86 |
80.0 |
|
1 Udder disease score (UDS) are graded 0–9, where each figure indicates a 10% increase of the probability that the cow has infectious mastitis. 2 Samples taken by farmers using Mastistrip®. | ||||||
Hamilton et al. Acta Veterinaria Scandinavica 2006 48:11 doi:10.1186/1751-0147-48-11 |
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