Volume 9, Number 3—March 2003
Dispatch
Mycobacterium celatum Pulmonary Infection in the Immunocompetent: Case Report and Review
Claudio Piersimoni*
, Pier Giorgio Zitti*, Domenico Nista*, and Stefano Bornigia*
, Pier Giorgio Zitti*, Domenico Nista*, and Stefano Bornigia*Table
Biochemical analysis of the described isolate (Mycobacterium celatum) compared to those of M. avium complex and M. xenopi
| Characteristics | Resultsa for: |
||
|---|---|---|---|
| Our isolate | M. avium complex | M. xenopi | |
| Niacin |
– |
– |
– |
| Nitrate reduction |
– |
– |
– |
| Thermostable catalase |
+ |
+ |
+ |
| Tween 80 hydrolysis (10 days) |
– |
– |
– |
| Tellurite reduction |
+ |
+ |
V |
| Arylsulfatase (3 days) |
– |
– |
+ |
| Urease |
– |
– |
– |
| Catalase (over 45 mm of foam) |
– |
– |
– |
| Photochromogenicity |
– |
– |
– |
| Scotochromogenicity |
+ |
– |
+ |
| Growth at 25°C |
+ |
+ |
– |
| Growth at 37°C |
+ |
+ |
+ |
| Growth at 45°C |
+ |
– |
+ |
| MacConkey w/o CV |
– |
– |
– |
| Tolerance to NaCl (5%) |
– |
– |
– |
| Tolerance to TCH (5 mg/mL) |
+ |
+ |
+ |
| Growth rate |
Slow |
Slow |
Slow |
| Colonial morphologic features | Smooth | Smooth | Smooth |
a– negative; +, positive; v, variable; TCH, thiophene-2-carboxylic acid hydrazide.
