Table 2. Biochemical characteristics of the described isolate compared to those of Mycobacterium lentiflavum and M. triplex.
| Characteristic | Our isolate | M. lentiflavum (6) | M. triplex (4) |
|---|---|---|---|
| Niacin | – | – | – |
| Nitrate reduction | + | – | + |
| Thermostable catalase | + | + | + |
| Tween 80 hydrolysis (10 days) | – | – | – |
| Tellurite reduction | – | – | NR |
| Arylsulfatase (3 days) | – | – | – |
| Urease | + | – | + |
| Catalase >45 mm | – | – | + |
| Photochromogenicity | – | – | – |
| Scotochromogenicity | – | + | – |
| Growth at 30°C | + | + | + |
| Growth at 37°C | + | + | + |
| Growth at 45°C | – | – | – |
| McConkey w/o CV | – | – | – |
| Tolerance to NaCl (5%) | – | – | – |
| Tolerance to TCH (5 mg/mL) | + | + | + |
| Growth rate | Slow | Slow | Slow |
| Colonial morphology | Smooth | Smooth | Smooth |
a–, negative; +, positive; NR, not reported; CV, crystal violet; TCH, thiophene-2-carboxylic acid hydrazide.