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Volume 10, Number 10—October 2004

Mycobacterium triplex Pulmonary Disease in Immunocompetent Host

Claudio Piersimoni*Comments to Author , Piergiorgio Zitti*, Gianna Mazzarelli†, Alessandro Mariottini†, Domenico Nista*, and Diego Zallocco*
Author affiliations: *United Hospitals, Ancona, Italy; †Careggi Hospital, Florence, Italy

Main Article

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)
Nitrate reduction + +
Thermostable catalase + + +
Tween 80 hydrolysis (10 days)
Tellurite reduction NR
Arylsulfatase (3 days)
Urease + +
Catalase >45 mm +
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.

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