TABLE 1.
Comparison of phenotypic characteristics of the novel isolates and related Mycobacterium species
| Species or isolate | Growth ata:
|
Test result
|
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 25°C | 30°C | 37°C | 42°C | Pigmentationb | Niacin | Urease | Pyrazinamidase | Tween hydrolysis (10 day) | Nitrate reductase | Arylsulfatase (14 day)c | Catalase at 68°C | Semiquantitative catalase | |
| Novel group | |||||||||||||
| 4773 | ± | + | + | − | N | − | + | + | − | − | 3+ | + | − |
| 283416 | + | + | + | − | N | − | + | + | − | − | 2+ | + | − |
| W55 | + | + | + | ± | N | + | + | − | − | − | 1+ | + | + |
| W58 | + | + | + | ± | N | + | + | − | − | − | 1+ | + | + |
| Va2 | + | + | + | ± | P | + | + | − | − | − | 3+ | + | − |
| M. simiae | + | + | + | + | P | ± | + | + | − | − | + | + | + |
| M. genavensed | ± | + | + | + | N | − | + | + | − | − | − | + | + |
| M. lentiflavum | ± | + | + | − | S | − | − | ± | − | − | − | ± | ± |
| M. triplex | − | + | + | + | N | − | + | + | − | + | 4+ | + | − |
| M. heidelbergense | − | + | + | − | N | − | + | + | + | − | 1+ | + | − |
| M. intermediume | + | + | + | + | P | − | + | − | + | − | + | + | + |
| M. interjectum | − | + | + | − | N | − | + | + | + | − | − | + | + |
a
+, positive; −, negative; ±, variable.
b
P, photochromogenic; S, scotochromogenic; N, nonchromogenic.
c
The 3-day arylsulfatase test was negative for all species tested in our laboratory
d
Growth on solid media requires mycobactin J supplement and prolonged incubation for up to 60 days.
e
Data are from reference 20.