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Table 2 Distribution of the Mycobacterium species during 1998–2000 in the Ghent University Hospital, number of smear positives and time to positivity of culture.

From: Evaluation of amplified rDNA restriction analysis (ARDRA) for the identification of cultured mycobacteria in a diagnostic laboratory

Mycobacterium species Number of isolates (%) Number of samples positive on direct smear a (% of culture positive) Average time until positive culture in days (smear positives; negatives)
M. tuberculosis complex 61 (40) 26 (46b) 16.7 (12.9; 20)
M. avium 12 2 6.5
M. heckeshornense 1 1 32.5
M. chelonae 4 0 18
M. fortuitum 2 0 35.5
M. gordonae 41 (27) 1 22.3
M. interjectum 1 0 30.5
M. intracellulare 1 0 11.6
M. kansasii/M. gastri 2 0 No data
M. malmoense 1 0 No data
M. szulgai 3 0 20.3
M. xenopi 22 (15) 0 38.1
Total 151 40 (26)  
  1. a: No data for 6 of the 61 samples. All six of these samples were M. tuberculosis culture positive. b. Calculated as 26 positives on a total of those 56 culture positives for which data on smear positivity were available.