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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