TABLE FOR M COMPLEX

Question 1

Acid-fast coccoid cells

Answer 1

M. asiaticum

Question 2

Dysgonic smooth and pigmented colonies

Answer 2

M. asiaticum

Question 3

(+) High level of heat stable catalase

Answer 3

M. asiaticum

Question 4

Saphrophytes; rarely cause human
infections

Answer 4

M. asiaticum

Question 5

Saphrophytes; rarely cause human
infections

Answer 5

M. asiaticum

Question 6

Distinct acid-fast cells

Answer 6

M. genavense

Question 7

Dysgonic colonies; requires an extended incubation (6-8 weeks) (

Answer 7

M. genavense

Question 8

+) semi-quantitative and heat stable catalase;
(+) Pyrazinamidase

Answer 8

M. genavense

Question 9

Fastidious; Do not grow on routine media; recovered in BACTEC culture

Answer 9

M. genavense

Question 10

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Distinct acid-fast cells; short or curved, without beading, appears clusters or cords

Answer 10

M. haemophilum

Question 11

Rough to smooth and non-pigmented; The recommended media include CA, MHA, with 5% Fildes
enrichement, LJ medium with 2% ferric ammonium citrate

Answer 11

M. haemophilum

Question 12

Requires hemoglobin or hemin for growth

Answer 12

M. haemophilum

Question 13

Short coccobacilli without crossbands

Answer 13

M. malmoense

Question 14

Non-pigmented, smooth, glistening and opaque colonies with dense centers

Answer 14

M. malmoense

Question 15

(+) Tween 80
hydrolysis, heat- stable catalase and pyrazinamidase

Answer 15

M. malmoense

Question 16

Growth at 22C requires 7 to 12 weeks of incubation

Answer 16

M. malmoense

Question 17

Short coccobacilli

Answer 17

M. simiae

Question 18

Filamentous colonies; yellow and smooth
colonies after extended incubation

Answer 18

M. simiae

Question 19

+) Niacin and high level of heat stable catalase

Answer 19

M. simiae

Question 20

One of the very few NTM that produces niacin

Answer 20

M. simiae

Question 21

Medium to long rods

Answer 21

M. scrofulaceum

Question 22

Light yellow to deep orange colonies with dense centers

Answer 22

M. scrofulaceum

Question 23

(+) High-level, heat stable catalase and urease

Answer 23

M. scrofulaceum

Question 24

Medium to long rods with cross barring

Answer 24

M. szulgai

Question 25

Yellow to orange and smooth to rough
colonies

Answer 25

M. szulgai

Question 26

(+) Heat stable catalase

Answer 26

M. szulgai