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Table 4 Sensitivity, specificity and predictive value positive of API Staph 32, RapID Staph and Staph-Zym tests showing individual results for species isolated in this study and overall values for test kits

From: Investigations on the efficacy of routinely used phenotypic methods compared to genotypic approaches for the identification of staphylococcal species isolated from companion animals in Irish veterinary hospitals

Species API Staph 32 RapID Staph-Zym
  Sens1 Spec2 PVP3 Sens Spec PVP Sens Spec PVP
Overall 61.5 98 80 32.7 95.4 47.2 1.9 99 20
S. aureus 100 100 100 81.8 100 100 0 100 n/a
SIG 83.3 95 83.3 41.6 95.2 71.4 0 95 n/a
S. felis 0 98 n/a4 0 98 n/a 0 98 n/a
S. equorum 0 97.7 n/a 0 100 n/a 0 100 n/a
S. succinus 0 100 n/a 0 100 n/a 0 100 n/a
S. warneri 50 98 50 0 98 n/a 0 98 n/a
S. carnosus 66.6 95.3 75 11.1 100 100 11.1 100 100
S. xylosus 77 83.3 27.2 50 66.6 15.8 0 66.6 n/a
S. saprophyticus 50 100 50 0 100 n/a 0 100 n/a
  1. Values calculated using tuf genotyping as a reference method.
  2. 1Sensitivity 2specificity 3predictive value positive 4not applicable.