Skip to main content

Advertisement

Table 1 Clinical isolates and identification results from MicroScan, VITEK2, and Crystal GP

From: Comparison of the MicroScan, VITEK 2, and Crystal GP with 16S rRNA sequencing and MicroSeq 500 v2.0 analysis for coagulase-negative Staphylococci

Clinical Isolates (using MicroSeq 500) No of isolates Correct Identificationa Low-level Discriminationb Misidentificationc Nonidentificationd
   MicroScan
S. capitis 16 13 (81.3%) - 3 (18.8%) -
S. caprae 4 - - 4 (100.0%) -
S. cohnii 3 1 (33.3%) 1 (33.3%) 1 (33.3%) -
S. epidermidis 53 51 (96.2%) - 2 (3.8%) -
S. haemolyticus 4 3 (75.0%) 1 (25.0%) - -
S. hominis 25 23 (92.0%) 2 (8.0%) - -
S. lugdunensis 6 2 (33.3%) 1 (16.7%) 3 (50.0%) -
S. saprophyticus 1 1 (100.0%) - - -
S. simulans 2 2 (100.0%) - - -
S. warneri 6 3 (50.0%) 3 (50.0%) - -
Subtotal 120 99 (82.5%) 8 (6.7%) 13 (10.8%) -
   VITEK 2
S. capitis 16 16 (100.0%) - - -
S. caprae 4 3 (75.0%) - 1 (25.0%) -
S. cohnii 3 3 (100.0%) - - -
S. epidermidis 53 47 (88.7%) 6 (11.3%) - -
S. haemolyticus 4 4 (100.0%) - - -
S. hominis 25 22 (88.0%) 1 (4.0%) 2 (8.0%) -
S. lugdunensis 6 5 (83.3%) 1 (16.7%) - -
S. saprophyticus 1 1 (100.0%) - - -
S. simulans 2 1 (50.0%) 1 (50.0%) - -
S. warneri 6 3 (50.0%) - 3 (50.0%) -
Subtotal 120 105 (87.5%) 9 (7.5%) 6 (5.0%) -
   Crystal GP
S. capitis 16 13 (81.3%) - 3 (18.8%) -
S. caprae 4 - - 4 (100.0%) -
S. cohnii 3 3 (100.0%) - - -
S. epidermidis 53 49 (92.5%) - 3 (5.7%) 1 (1.9%)
S. haemolyticus 4 4 (100.0%) - - -
S. hominis 25 1 (4.0%) - 15 (60.0%) 9 (36.0%)
S. lugdunensis 6 2 (33.3%) - 3 (50.0%) 1 (16.7%)
S. saprophyticus 1 1 (100.0%) - - -
S. simulans 2 2 (100.0%) - - -
S. warneri 6 6 (100.0%) - - -
Subtotal 120 81 (67.5%) - 28 (23.3%) 11 (9.2%)
  1. Correct identificationa: single, unambiguous, correct identification at the species level
  2. Low-level discriminationb: two or more possible species level identification including the correct one
  3. Misidentificationc: genus or species-level identification different from that obtained with the reference method
  4. Nonidentificationd: no identification or unidentification