Biochemical Test -- Fever and a Hilar Pulmonary Mass

BIOCHEMICAL TEST:

A biochemical panel was inoculated with the organism, and the following results recorded:

Test	Patient result	Positive control	Negative control
Nitrate reduction	+ , strong	M. tuberculosis, +	M. chelonae, neg.
Arylsulfatase (3 d growth)	+ pale pink	M. fortuitum, +	M. smegmatis, neg.
Arylsulfatase (14 d growth)	+ , red	M. fortuitum, +	M. smegmatis, +
Semiquantitative catalase.	+ (60mm)	M. kansasii +, ( 75 mm)	M. avium neg. ( 7 mm)
Tween Hydrolysis (5 d gr)	+	M. kansasii, +	M. avium, neg.
Tween Hydrolysis (10 d gr)	+	M. kansasii, +	M. avium, neg.
Tellurite	Negative	M. avium, +	M. triviale, neg.
Urease	+	M. chelonae, +	M. avium, neg.

ANTIBIOTIC SUSCEPTIBILITY TESTING

FINAL DIAGNOSIS