Table 5.
Most frequent incorrect identifications with high probability score for species not represented in the database or “incorrect” use of the panels (Gram-positive isolates inoculated on Gram-negative panels and vice versa, Streptococcus using Micrococcus/Staphylococcus algorithm and vice versa). N = total number of isolates tested.
| Species. | Algorithm Used (for Gram-Positive Panels) | N | Number of Isolates with this Result | Result |
|---|---|---|---|---|
| Species not represented in the database | ||||
| Yeast species | Micrococcus | 9 | 9 | Staphylococcus cohnii |
| Streptococcus | 9 | Rhodococcus equi | ||
| Corynebacterium species | Micrococcus | 6 | 1 | Micrococcus species |
| Streptococcus | 6 | 1 | Rhodococcus equi | |
| Bacillus species | Micrococcus | 10 | 4 | Staphylococcus auricularis |
| Gram-positive species on Gram-negative panel | ||||
| Streptococcus dysgalactiae | 2 | 2 | Providencia rustigiannii | |
| Streptococcus suis | 10 | 9 | Providencia rustigiannii | |
| Staphylococcus lentus | 1 | 1 | Providencia rustigiannii | |
| Streptococcus agalactiae | 5 | 1 | Providencia rustigiannii | |
| Gram-negative species on Gram-positive panel | ||||
| Escherichia coli/paracoli | Streptococcus | 10 | 3 | Rhodococcus equi |
| Acinetobacter baumannii | Micrococcus | 4 | 3 | Staphylococcus cohnii |
| Micrococcus | 1 | Staphylococcus auricularis | ||
| Streptococcus | 1 | Rhodococcus equi | ||
| Stenotrophomonas maltophilia | Streptococcus | 4 | 2 | Rhodococcus equi |
| Burkholderia cepacia | Streptococcus | 4 | 3 | Rhodococcus equi |
| Burkholderia thailandensis | Streptococcus | 4 | 1 | Rhodococcus equi |
| Burkholderia ubonensis | Streptococcus | 1 | 1 | Rhodococcus equi |
| Gram-positive species using incorrect algorithm on Gram-positive panel | ||||
| Staphylococcus aureus | Streptococcus | 14 | 3 | Rhodococcus equi |
| Micrococcus species | Streptococcus | 4 | 2 | Rhodococcus equi |
| Staphylococcus lentus | Streptococcus | 1 | 1 | Rhodococcus equi |
| Streptococcus gallolyticus | Micrococcus | 10 | 9 | Listeria monocytogenes |
| Streptococcus pneumoniae | Micrococcus | 12 | 9 | Micrococcus species |
| 2 | Staphylococcus auricularis | |||
| Streptococcus pyogenes | Micrococcus | 13 | 2 | Staphylococcus auricularis |
| Streptococcus agalactiae | Micrococcus | 13 | 1 | Staphylococcus auricularis |
| Streptococcus anginosus | Micrococcus | 8 | 1 | Staphylococcus auricularis |
| Streptococcus mitis/oralis | Micrococcus | 5 | 1 | Staphylococcus auricularis |