Table 6 Cow factors with significant ( P < 0.10) effect on prevalence of subclinical mastitis (SCC ≥200 000/ml) or intramammary infections (IMI) in beef cows examined at weaning in 10 beef cow herds
From: Udder health in beef cows and its association with calf growth
Outcome | Cow factor | Class | Number of cows with different numbers of quarters affected (QA)a | Total numbers P-values | ||
|---|---|---|---|---|---|---|
Quarters with SCC ≥200 000/ml | Hygiene | 0 QA | 1 QA | ≥2 QA | ||
1 | 9 | 8 | 11 | 28 | ||
2 | 29 | 13 | 11 | 53 | ||
3-4 | 1 | 4 | 4 | 9 | ||
Total | 39 | 25 | 26 | P = 0.051 | ||
Quarters with CMTb ≥3 | Hygiene | 0 QA | 1-4 QA | |||
1 | 16 | 10 | 26 | |||
2 | 40 | 8 | 48 | |||
3-4 | 5 | 4 | 9 | |||
Total | 61 | 22 | P = 0.044 | |||
Quarters with any IMI | Hygiene | 0 QA | 1 QA | ≥2 QA | ||
1 | 13 | 7 | 8 | 28 | ||
2 | 36 | 12 | 5 | 53 | ||
3-4 | 3 | 4 | 2 | 9 | ||
Total | 52 | 23 | 15 | P = 0.067 | ||
Quarters with major IMI | Blind quarter present | 0 QA | 1 QA | ≥2 QA | ||
No | 65 | 13 | 4 | 82 | ||
Yes | 4 | 1 | 3 | 8 | ||
Total | 69 | 14 | 7 | P = 0.026 | ||
Quarters with S. aureus IMI | Blind quarter present | 0 QA | ≥1 QA | |||
No | 70 | 12 | 82 | |||
Yes | 4 | 4 | 8 | |||
Total | 74 | 16 | P = 0.031 | |||