Table 2.
Overall performance of the MicroScan Gram-negative, Gram-positive, and MSF ID panels for species represented in the MicroScan database. N = total number of isolates tested. Details of incorrect identifications with their probability scores are listed in Table 3. * Formerly part of Streptococcus bovis group.
| Species | N | Correct Identification | Incorrect Identification | Identification Not Possible | ||
|---|---|---|---|---|---|---|
| High Probability Score | Low Probability Score | High Probability Score | Low Probability Score | |||
| Enterobacterales | ||||||
| Escherichia coli | 28 | 24 | 3 | - | 1 | - |
| Klebsiella pneumoniae | 13 | 13 | - | - | - | - |
| Klebsiella oxytoca | 3 | 3 | - | - | - | - |
| Enterobacter cloacae complex | 15 | 14 | - | - | 1 | - |
| Citrobacter freundii complex | 9 | 9 | - | - | - | - |
| Kluyvera ascorbata | 1 | 1 | - | - | - | - |
| Salmonella Typhi | 10 | 10 | - | - | - | - |
| Salmonella Paratyphi A | 10 | 9 | - | 1 | - | - |
| Salmonella Typhimurium | 10 | 10 | - | - | - | - |
| Salmonella Choleraesuis | 9 | 8 | - | - | 1 | - |
| Shigella species | 10 | 9 | - | - | 1 | - |
| Morganella morganii | 4 | 4 | - | - | - | - |
| Proteus mirabilis | 7 | 7 | - | - | - | - |
| Providencia rettgerii | 1 | 1 | - | - | - | - |
| Enterobacterales | 130 | 122 (93.8%) | 3 (2.3%) | 1 (0.8%) | 4 (3.1%) | 0 (0%) |
| Non-fermenting Gram-negative organisms and Aeromonas/Vibrio species | ||||||
| Pseudomonas aeruginosa | 11 | 11 | - | - | - | - |
| Acinetobacter baumannii | 9 | 8 | - | 1 | - | - |
| Achromobacter xylosoxidans | 10 | 8 | - | 1 | 1 | - |
| Burkholderia cepacia | 15 | 13 | 1 | - | 1 | - |
| Stenotrophomonas maltophilia | 15 | 14 | 1 | - | - | - |
| Aeromonas species | 3 | 2 | - | - | 1 | - |
| Vibrio alginolyticus | 2 | 2 | - | - | - | - |
| Non-fermenters | 65 | 58 (89.2%) | 2 (3.1%) | 2 (3.1%) | 3 (4.6%) | 0 (0%) |
| Total Gram-negative isolates | ||||||
| Total Gram-negative | 195 | 180 (92.3%) | 5 (2.6%) | 3 (1.5%) | 7 (3.6%) | - |
| Species | N | Correct Identification | Incorrect Identification | Identification Not Possible | ||
| High Probability Score | Low Probability Score | High Probability Score | Low Probability Score | |||
| Micrococcaceae | ||||||
| Staphylococcus aureus | 14 | 14 | - | - | - | - |
| Staphylococcus hominis | 3 | 2 | 1 | - | - | - |
| Staphylococcus epidermidis | 11 | 10 | - | 1 | - | - |
| Staphylococcus lugdunensis | 3 | 3 | - | - | - | - |
| Staphylococcus lentus | 1 | - | - | 1 | - | - |
| Staphylococcus haemolyticus | 6 | 3 | - | 2 | 1 | - |
| Listeria monocytogenes | 2 | 2 | - | - | - | - |
| Micrococcus species | 4 | 4 | - | - | - | - |
| Total Staphylococcus/Micrococcus | 44 | 38 (86.4%) | 1 (2.3%) | 4 (9.1%) | 1 (2.3%) | 0 (0%) |
| Streptococcaceae | ||||||
| Enterococcus faecalis | 7 | 7 | - | - | - | - |
| Enterococcus faecium | 7 | 4 | - | 2 | - | 1 |
| Enterococcus casseliflavus | 1 | - | - | 1 | - | - |
| Streptococcus agalactiae | 13 | 11 | 1 | - | 1 | - |
| Streptococcus anginosus | 8 | 2 | 2 | 3 | - | 1 |
| Streptococcus pneumoniae | 12 | 9 | - | 2 | 1 | - |
| Streptococcus gallolyticus * | 10 | 9 | 1 | - | - | - |
| Streptococcus lutetiensis * | 1 | - | - | - | 1 | - |
| Streptococcus pyogenes | 13 | 13 | - | - | - | - |
| Streptococcus dysgalactiae (group C & G) | 6 | 6 | - | - | - | - |
| Streptococcus mitis | 5 | 2 | 3 | - | - | - |
| Streptococcus salivarius | 1 | 1 | - | - | - | - |
| Total Streptococcus/Enterococcus species | 84 | 64 (76.2%) | 7 (8.3%) | 8 (9.5%) | 3 (3.6%) | 2 (2.4%) |
| Total Gram-positive isolates | ||||||
| Total Gram-positive | 128 | 102 (79.7%) | 8 (6.3%) | 12 (9.4%) | 4 (3.9%) | 2 (1.6%) |
| Overall total | 323 | 282 (87.3%) | 13 (4.0%) | 15 (4.6%) | 11 (3.4%) | 2 (0.6%) |