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Table 5 Distribution of bacteriological diagnoses from quarter milk samples from cows newly or chronically infected with subclinical mastitis.

From: Etiology and antimicrobial susceptibility of udder pathogens from cases of subclinical mastitis in dairy cows in Sweden

Diagnosis

Newly infected cows (n, %)

Chronically infected cows (n, %)

Total

Staphylococcus aureus

44 (15%)

66 (22%)

110 (18.6%)

Coagulase-negative staphylococci

51 (18%)

46 (15%)

97 (16.4%)

Streptococcus dysgalactiae

21 (7.3%)

33 (11%)

54 (9.2%)

Streptococcus uberis

18 (6.4%)

31 (10%)

49 (8.3%)

Streptococcus agalactiae

0

1 (0.3%)

1 (0.2%)

Other streptococci

4 (1.4%)

7 (2.3%)

11 (1.9%)

Enterococci

1 (0.3%)

4 (1.3%)

5 (0.8%)

Arcanobacterium pyogenes

1 (0.3%)

1 (0.3%)

2 (0.3%)

Escherichia coli

7 (2.5%)

10 (3.3%)

17 (2.9%)

Klebsiella spp.

3 (1.1%)

2 (0.7%)

5 (0.8%)

Other coliform bacteria

2 (0.7%)

1 (0.3%)

3 (0.5%)

Other bacteria

2 (0.7%)

1 (0.3%)

3 (0.5%)

Contaminated

60 (21%)

45 (15%)

105 (17.8%)

No growth

72 (25%)

56 (19%)

128 (21.7%)

Total

286

304

590