Table 1.
Level of agreement between 16S rRNA and commercial MALDI-TOF MS database (Bruker Biotyper library v.4.0) identification of Nocardia species.
| Nocardia spp. (no. of strains) | Agreement between 16S and MALDI-TOF MS | No. of strains in the Bruker database |
|---|---|---|
| High prevalence (n = 25) | ||
| Nocardia abscessus (n = 2) | 2/2 | 2 |
| N. cyriacigeorgica (n = 6) | 5/6 | 16 |
| N. farcinica (n = 8) | 7/8 | 12 |
| N. nova (n = 9) | 5/9 | 2 |
| Total (%) | 19/25 (76.0%) | 32 |
| Intermediate prevalence (n = 20) | ||
| N. brasiliensis (n = 5) | 3/5 | 1 |
| N. carnea (n = 7) | 1/7 | 1 |
| N. otitidiscaviarum (n = 5) | 5/5 | 6 |
| N. transvalensis complex (n = 3) | 0/3 | 1 |
| Total (%) | 9/20 (45%) | 9 |
| Low prevalence (n = 55) | ||
| 22 Nocardia species: | 5/55 | 45 |
| -13 Nocardia species included in Bruker database (n = 28) | 5/23 | 45 |
| -9 Nocardia species not included in Bruker database (n = 27) | 0 | 0 |
| Total (%) | 5/55 (9.1%) | 45 |