3.4.5.1 Group IV Rapid growers

Question 1

Colonies has smooth, nonpigmented to buff colonies within 3-5 days at 37

Answer 1

M. chelonae (M. abscessus group)

Question 2

(+) 3 day arysulfatase test
(+) growth on MAC agar without crystal violet
(-) for nitrite reduction

Answer 2

M. chelonae

Question 3

(+) 3 days arysulfatase and Nitrite reduction

Answer 3

M. fortuitum group

Question 4

(-) arysulfatase
(+) MAC and Nitrite reduction

Answer 4

M. smegmatis group