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) | |