Skip to main content

Table 1 Validity of single quarter samples in diagnosing intramammary Staph. aureus infections (95% confidence interval between brackets)

From: Mastitis diagnostics and performance monitoring: a practical approach

  All cows Cows with SCC > 200,000 cells/ml Cows with SCC repeatedly >200,000 cells/ml
Sensitivity 0.92 (0.90; 0.95) 0.91 (0.88; 0.95) 0.90 (0.86; 0.95)
Specificity 0.98 (0.98; 0.98) 0.87 (0.86; 0.89) 0.97 (0.97; 0.98)
Pred. Value Pos. 0.54 (0.51; 0.58) 0.41 (0.38; 0.46) 0.82 (0.78; 0.88)
Pred. Value Neg. 0.99 (0.99; 1.00) 0.99 (0.99; 0.99) 0.98 (0.98; 0.99)