Pulmonary versus Nonpulmonary Nontuberculous Mycobacteria, Ontario, Canada

Emerg Infect Dis. 2017 Nov;23(11):1898-1901. doi: 10.3201/eid2311.170959.


In Ontario, Canada, during 1998-2010, nontuberculous mycobacteria (NTM) from pulmonary sites comprised 96% of species/patient combinations isolated; annual rates of isolation and cases increased steadily. NTM isolates from nonpulmonary sites comprised 4% of species/patient combinations; annual rates and cases were temporally stable. NTM increases were driven exclusively by pulmonary isolates and disease.

Keywords: Canada; Mycobacterium avium complex; NTM; Ontario; bacteria; epidemiology; infection; nontuberculous mycobacteria; nontuberculous mycobacterium; tuberculosis and other mycobacteria.

MeSH terms

  • Humans
  • Lung / microbiology
  • Mycobacterium Infections, Nontuberculous / epidemiology*
  • Mycobacterium Infections, Nontuberculous / microbiology
  • Nontuberculous Mycobacteria / classification
  • Nontuberculous Mycobacteria / isolation & purification*
  • Ontario / epidemiology
  • Prevalence
  • Retrospective Studies