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Volume 29, Number 7—July 2023
Dispatch

Pulmonary Nontuberculous Mycobacteria, Ontario, Canada, 2020

Theodore K. MarrasComments to Author , Paul Nelson, Adriana Peci, Melissa Richard-Greenblatt, Sarah Brode, Ashleigh Sullivan, Frances B. Jamieson, and Julianne V. Kus
Author affiliations: University of Toronto, Toronto, Ontario, Canada (T.K. Marras, M. Richard-Greenblatt, S. Brode, F.B. Jamieson, J.V. Kus); University Health Network and Mount Sinai Hospital, Toronto (T.K. Marras, S. Brode); Public Health Ontario, Toronto (P. Nelson, A. Peci, M. Richard-Greenblatt, A. Sullivan, F.B. Jamieson, J.V. Kus); University of Oxford, Oxford, UK (M. Richard-Greenblatt); West Park Healthcare Centre, Toronto (S. Brode)

Main Article

Table 1

Characteristics of pulmonary nontuberculous mycobacterial disease, by microbiological definition, among patients in Ontario, Canada, 2020*

NTM species/subspecies Standard definition†
 Strict definition‡
No. (%) patients Prevalence§ No. (%) patients Prevalence§
Common MAC species
M. avium 1,954 (69.2) 13.27 1,171 (73.1) 7.95
M. intracellulare 182 (6.4) 1.24 101 (6.3) 0.69
M. chimaera 39 (1.4) 0.26 18 (1.1) 0.12
M. abscessus and its subspecies
M. abscessus (total) 164 (5.8) 1.11 114 (7.1) 0.77
subspecies abscessus 95 (3.4) 0.65 66 (4.1) 0.45
subspecies bolletii 1 (0.04) 0.01 1 (0.06) 0.01
subspecies massiliense 52 (1.8) 0.35 38 (2.4) 0.26
subspecies unassigned
 16 (0.6)
 0.11
9 (0.6)
 0.06
Other species
M. xenopi 123 (4.4) 0.84 63 (3.9) 0.43
M. fortuitum 98 (3.5) 0.67 53 (3.3) 0.36
M. gordonae 117 (4.1) 0.79 26 (1.6) 0.18
Other NTM species
 147 (5.2)
 1.00
56 (3.5)
 0.38
Total 2,824 (100) 19.0 1,602 (100) 10.9

*Counts within each disease definition represent unique patients; some patients fulfilled criteria for >1 species. MAC, Mycobacterium avium complex; NTM, nontuberculous myobacteria. †Standard microbiological criteria: >2 sputum cultures with the same species, or 1 bronchoscopic or lung biopsy culture. ‡Strict microbiological criteria (subset of standard): >3 sputum cultures with the same species, or >2 bronchoscopic cultures with the same species, or 1 bronchoscopic plus 1 sputum culture with the same species, or 1 lung biopsy culture. §Cases per 100,000 population.

Main Article

Page created: April 20, 2023
Page updated: June 20, 2023
Page reviewed: June 20, 2023
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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