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. 2017 Jun 13;12(6):e0179455. doi: 10.1371/journal.pone.0179455

Table 2. Assessment of the selective BEAV broth plus MALDI-TOF MS (SBEAVM) method for the detection of VRE in selected patients.

Incubation period (hours) Purpose Number of Sensitivity
(%)
Specificity
(%)
PPV
(%)
NPV
(%)
TP FP TN FN
20 ASC 11 0 52 9 55.0 100.0 100.0 85.3
FUC 20 1 19 23 46.5 95.0 95.2 45.2
24 ASC 16 2 50 4 80 96.2 88.9 92.6
FUC 40 4 16 3 93.0 80.0 90.9 84.2
28 ASC 18 3 49 2 90.0 94.2 85.7 96.1
FUC 41 4 16 2 95.3 80.0 91.1 88.9

The screening method was used for the ASC of high-risk patients without VRE colonization or infection during the previous 6 months.

The screening method was used for the FUC of patients with VRE colonization or infection during the previous 6 months.

BEAV, bile esculin azide broth with vancomycin; MALDI-TOF MS, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry; SBEAVM, selective BEAV broth plus MALDI-TOF MS identification; VRE, vancomycin-resistant Enterococci; TP, true positive; FP, false positive; TN, true negative; FN, false negative; ASC, active surveillance culture; FUC, follow-up culture