Table 1 Logistic regression analysis of S. aureus occurrence in different sample types
Sample type | Sample size | No. S. aureus positive | % positive (95% CI) | OR (95% CI) | P-value |
|---|---|---|---|---|---|
Hand swabs | 50 | 9 | 18 (9.5–31.5) | 1 | – |
Bulk farm milk | 50 | 21 | 42 (28.9–56.3) | 3.3 (1.32–8.23) | 0.011 |
Pooled udder milk | 102 | 38 | 37.3 (28.3–47.1) | 2.7 (1.18–6.18) | 0.018 |
Water for cleaning teat and hands | 50 | 5 | 10 (4.1–22.3) | 0.51 (0.16–1.63) | 0.255 |
Milking container swabs | 50 | 7 | 14 (6.7–27) | 0.74 (0.25–2.18) | 0.586 |
Bulk container swabs | 30 | 5 | 16.7 (6.8–35.3) | 0.91 (0.27–3.03) | 0.879 |
Teat swabs | 102 | 23 | 22.5 (15.4–31.2) | 1.33 (0.56–3.13) | 0.519 |
Overall | 434 | 108 | 24.9 (21–29.2) |  |  |