Table 1. Comparison of the results for frequently isolated bacteria from the Bruker Biotyper and ASTA MicroIDSys systems.
| Species | N of isolates with identical/discrepant results | ||||
|---|---|---|---|---|---|
| Score (Bruker): ≥2.0 | Score (Bruker): 1.7 ≤ , < 2.0 | Total | |||
| Score (ASTA): | Score (ASTA): | ||||
| ≥ 140 | < 140 | ≥ 140 | < 140 | ||
| Gram-negative bacilli | |||||
| Acinetobacter baumannii | 420/1 | 3 | 12 | 435/1 | |
| Acinetobacter nosocomialis | 18 | 18/0 | |||
| Burkholderia cenocepacia | 13 | 13/0 | |||
| Citrobacter freundii | 16 | 0/1 | 5 | 21/1 | |
| Elizabethkingia meningoseptica | 11 | 2 | 13/0 | ||
| Enterobacter aerogenes | 75 | 0/1 | 1 | 76/1 | |
| Enterobacter asburiae | 6/9 | 0/1 | 6/10 | ||
| Enterobacter cloacae | 42/3 | 1 | 3/1 | 46/4 | |
| Enterobacter kobei | 13/4 | 0/1 | 13/5 | ||
| Escherichia coli | 360/1 | 0/2 | 8 | 0/1 | 368/4 |
| Haemophilus influenzae | 22 | 1 | 0/1 | 23/1 | |
| Klebsiella oxytoca | 14 | 1 | 15/0 | ||
| Klebsiella pneumoniae | 0539 | 1 | 31 | 571/0 | |
| Moraxella catarrhalis | 19 | 1 | 20/0 | ||
| Morganella morganii | 25 | 25/0 | |||
| Proteus mirabilis | 26 | 26/0 | |||
| Providencia rettgeri | 14 | 1 | 15/0 | ||
| Pseudomonas aeruginosa | 0349 | 1 | 8 | 358/0 | |
| Serratia marcescens | 24 | 1 | 25/0 | ||
| Stenotrophomonas maltophilia | 96 | 1 | 11 | 108/0 | |
| N of subtotal (%) | 2,102/18 (94.6/0.8) | 11/4 (0.5/0.2) | 82/3 (3.7/0.1) | 0/2 (0/0.1) | 2,195/27 (98.8/1.2) |
| Gram-positive cocci | 12/0 | ||||
| Enterococcus avium | 12 | ||||
| Enterococcus faecalis | 0204 | 1/1 | 10/1 | 1 | 218/2 |
| Enterococcus faecium | 250/2 | 0/1 | 6 | 259/3 | |
| Enterococcus raffinosus | 7 | 5 | 12/0 | ||
| Staphylococcus aureus | 501/1 | 1 | 7 | 510/1 | |
| Staphylococcus capitis | 16 | 8 | 24/0 | ||
| Staphylococcus epidermidis | 356 | 84/1 | 2 | 443/1 | |
| Staphylococcus haemolyticus | 81 | 0/1 | 42/1 | 125/2 | |
| Staphylococcus hominis | 14 | 7 | 21/0 | ||
| Staphylococcus lugdunensis | 8 | 1/1 | 10/1 | ||
| Streptococcus agalactiae | 41 | 3 | 44/0 | ||
| Streptococcus anginosus | 59 | 1 | 3 | 63/0 | |
| Streptococcus constellatus | 14 | 1/1 | 16/1 | ||
| Streptococcus mitis | 20/1 | 0/1 | 3/1 | 0/1 | 27/4 |
| Streptococcus oralis | 30 | 1/2 | 4/3 | 2/4 | 46/9 |
| Streptococcus parasanguinis | 21 | 7 | 28/0 | ||
| Streptococcus pneumoniae | 14/10 | 2/2 | 4/3 | 35/15 | |
| Streptococcus salivarius | 23 | 10 | 33/0 | ||
| N of subtotal (%) | 1,671/14 (86.8/0.7) | 6/8 (0.3/0.4) | 205/12 (10.6/0.6) | 5/5 (0.3/0.3) | 1,887/39 (98.0/2.0) |
| Other bacteria | |||||
| Clostridium difficile | 30 | 3 | 1 | 34 | |
| Clostridium hathewayi | 13 | 1 | 14 | ||
| Corynebacterium amycolatum | 18 | 18 | |||
| Corynebacterium striatum | 190/1 | 0/4 | 6 | 196/5 | |
| Lactobacillus crispatus | 8 | 1 | 13 | 22 | |
| Neisseria flavescens | 11 | 2 | 13 | ||
| Rothia mucilaginosa | 28 | 27 | 1 | 56 | |
| N of subtotal (%) | 298/1 (83.2/0.3) | 1/4 (0.3/1.1) | 52/0 (14.5/0) | 2/0 (0.6/0) | 353/5 (98.6/1.4) |
| Candida spp. | |||||
| Candida albicans | 93 | 0/1 | 149/3 | 0/2 | 242/6 |
| Candida glabrata | 27 | 21 | 48 | ||
| Candida krusei | 11 | 3 | 1 | 15 | |
| Candida parapsilosis | 4 | 19 | 23 | ||
| Candida tropicalis | 28 | 50 | 0/1 | 79 | |
| N of subtotal (%) | 163/0 (39.5/0) | 0/1 (0/0.2) | 242/3 (58.6/0.7) | 1/3 (0.2/0.7) | 406/7 (98.3/1.7) |
| Total (%) | 4,234/33 (86.1/0.7) | 18/17 (0.4/0.3) | 581/18 (11.8/0.4) | 8/10 (0.2/0.2) | 4,841/78 (98.4/1.6) |