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Volume 9, Number 3—March 2003

Dispatch

Mycobacterium celatum Pulmonary Infection in the Immunocompetent: Case Report and Review

Claudio Piersimoni*Comments to Author , Pier Giorgio Zitti*, Domenico Nista*, and Stefano Bornigia*
Author affiliations: *Umberto I°–Torrette Hospital, Ancona, Italy

Main Article

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.

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