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Table 4 Nontuberculous mycobacteria recovered from 1002 respiratory samples from 676 patients by RGM at 30 °C and conventional AFB culture

From: An evaluation of methods for the isolation of nontuberculous mycobacteria from patients with cystic fibrosis, bronchiectasis and patients assessed for lung transplantation

 

Totala

RGM 30 °C

AFB Culture

RGM 30 °C

AFB Culture

 
 

n

n

n

Sensitivity (%)b

P b

M. abscessus complex (MABSC)c

51

49

30

96.1

58.8

< 0.0001

M. avium complex (MAC)d

47

39

33

83

70.2

0.21

M. chelonae complexe

86

86

4

100

4.7

< 0.0001

M. paragordonae / gordonae

57

56

3

98.2

5.3

< 0.0001

M. llatzerense

52

52

0

100

0

< 0.0001

Mycobacterium species

27

26

0

96.3

0

< 0.0001

M. mucogenicum-phocaicum group

8

8

0

–

–

–

M. septicum

6

6

0

–

–

–

M. simiae

5

1

5

–

–

–

M. fortuitum

2

2

1

–

–

–

M. lentiflavum

2

2

0

–

–

–

M. obuense

2

2

0

–

–

–

M. paraffinicum

2

2

0

–

–

–

M. arupense

1

1

0

–

–

–

M. iranicum

1

0

1

–

–

–

M. kumamotonense

1

0

1

–

–

–

M. mageritense

1

1

0

–

–

–

M. neoaurum

1

1

0

–

–

–

M. xenopi

1

0

1

–

–

–

Total

353

334

79

94.6

22.4

< 0.0001

  1. aMABSC (n = 2), MAC (n = 3), and Mycobacterium sp. (n = 1) are included in the totals but were only isolated using RGM medium at 37 °C
  2. bSensitivity and probability (P) were calculated only where the number of isolates (n) was > 10
  3. cMABSC included subspecies abscessus (n = 30), subspecies massiliense (n = 13) and 8 isolates unresolved to subspecies level
  4. dMAC included subspecies avium (n = 16), subspecies intracellulare-chimaera (n = 27) and M. colombiense (n = 1). 3 isolates could not be resolved further than M. avium complex
  5. eM. chelonae complex includes M. chelonae / salmoniphilum (n = 77) and M. franklinii (n = 9)