DOI: 10.1128/JCM.00506-11
Article Figures & Data
Figures
- Fig. 1.
Percent identification of staphylococci, streptococci, enterococci, and “related genera” to the genus and species levels by the Bruker Biotyper system.
Tables
- Table 1.
Bruker Biotyper identification of staphylococci, streptococci, and related genera to the genus and species levels by use of direct colony testing and preparatory extraction
Organism No. of isolates No. of isolates (% correct) identified by: No. of spectra in database Extraction Direct colony Genus level Species level Genus level Species level Staphylococci, streptococci, and enterococci Staphylococcus aureus 20 20 19 18 8 12 Staphylococcus lugdunensis 8 8 8 7 1 5 Staphylococcus epidermidis 14 14 11 11 1 9 Staphylococcus saprophyticus 6 3 0 0 0 8 Staphylococcus capitis 6 6 6 4 2 6 Staphylococcus haemolyticus 5 5 5 2 0 8 Staphylococcus hominis 5 5 4 4 2 6 Staphylococcus pettenkoferi 5 5 0 1 0 4 Staphylococcus schleiferi 4 4 4 0 0 6 Staphylococcus intermedius/S. pseudointermedius 2 2 1 0 0 3 Staphylococcus simulans 2 2 0 0 0 5 Staphylococcus pasteuri/S. warneri 1 1 1 1 0 2 Streptococcus pyogenes 10 10 10 4 1 8 Streptococcus agalactiae 7 7 7 1 1 10 Group C beta-hemolytic streptococci 6 6 6 1 1 NA Group F beta-hemolytic streptococci 1 1 1 1 0 NA Group G beta-hemolytic streptococci 2 2 1 0 0 NA Streptococcus pneumoniae 10 10 10 6 3 9 Streptococcus mitis group 10 10 3 10 2 10 Streptococcus mutans group 10 10 8 9 6 10 Streptococcus salivarius group 11 11 7 6 0 6 Streptococcus anginosus group 11 10 5 9 4 5 Streptococcus bovis group 13 13 10 9 2 11 Streptococcus dysgalactiae 1 1 1 0 0 3 Streptococcus equi subsp. zooepidemicus 1 1 1 1 0 5 Streptococcus halichoeri 1 1 1 0 0 1 Enterococcus faecium 15 15 15 14 12 9 Enterococcus faecalis 15 15 15 11 7 8 Enterococcus avium 6 6 6 1 0 2 Enterococcus raffinosus 2 2 0 0 0 1 Enterococcus avium/E. raffinosus 1 1 1 0 0 3 Enterococcus gallinarum 1 1 1 1 1 3 Enterococcus casseliflavus/E. gallinarum 4 4 2 4 2 8 Enterococcus gilvus 1 1 1 0 0 1 Total 217 213 (98) 171 (79) 136 (63) 56 (26) Related genera Rothia mucilaginosa 11 11 1 1 0 3 Rothia dentocariosa/R. aeria 6 5 4 2 0 5 Micrococcus luteus/M. yunnanensis 6 6 5 4 0 2 Micrococcus luteus 3 2 1 1 1 2 Granulicatella adiacens 7 5 0 0 0 1 Granulicatella elegans 1 0 0 0 0 1 Abiotrophia defectiva 6 6 6 5 0 2 Aerococcus sanguinicola 12 11 4 4 0 2 Aerococcus urinae 7 7 5 3 0 3 Aerococcus viridans 1 1 0 0 0 5 Gemella morbillorum 2 0 0 0 0 1 Gemella sp. 2 2 0 2 0 2 Kocuria kristinae 3 3 1 0 0 3 Kocuria rosea 1 1 1 1 0 5 Kocuria palustris 1 1 0 0 0 1 Helcococcus kunzii 2 2 2 2 0 2 Lactococcus lactis 4 4 4 4 2 5 Leuconostoc citreum 1 1 1 1 1 2 Pediococcus sp. 1 1 1 1 0 2 Facklamia languida 1 1 0 1 0 1 Facklamia ignava 1 0 0 0 0 1 Arthrobacter cumminsii 1 1 0 0 0 1 Macrococcus caseolyticus 1 0 0 0 0 1 Total 81 71 (88) 36 (44) 32 (40) 4 (5) - Table 2.
Numbers and percentages of isolates identified with lowered scores assigned for genus and species identifications using extraction and direct colony methods
Score cutoff No. (%) of isolates identified Extraction Direct colony Genus ≥1.4 295 (99) 226 (76) ≥1.5 293 (98) 214 (72) ≥1.6 291 (98) 191 (64) ≥1.7 284 (95) 168 (56) Species ≥1.7 276 (93) 161 (54) ≥1.8 248 (83) 129 (43) ≥1.9 224 (75) 95 (32) ≥2.0 207 (69) 60 (20)
