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Am J Respir Crit Care Med. 2010 Oct 1;182(7):977-82. doi: 10.1164/rccm.201003-0503OC. Epub 2010 May 27.

Pulmonary nontuberculous mycobacterial disease prevalence and clinical features: an emerging public health disease.

Author information

1
Oregon Health & Science University, Portland, OR 97239, USA. Winthrop@ohsu.edu

Abstract

RATIONALE:

Respiratory specimens with nontuberculous mycobacteria (NTM) are increasingly common; however, pulmonary disease prevalence is unknown.

OBJECTIVES:

To determine the disease prevalence, clinical features, and risk factors for NTM disease, and to examine the predictive value of the microbiologic criteria of the American Thoracic Society (ATS)/Infectious Diseases Society of America (IDSA) pulmonary NTM case definition for true NTM disease.

METHODS:

We identified all Oregon residents during 2005-2006 with at least one respiratory mycobacterial isolate. From a population-based subset of these patients, we collected clinical and radiologic information and used the ATS/IDSA pulmonary NTM disease criteria to define disease.

MEASUREMENTS AND MAIN RESULTS:

In the 2-year time period, 807 Oregonians had one or more respiratory NTM isolates. Four hundred and seven (50%) resided within the Portland metropolitan region, among which 283 (70%) had evaluable clinical records. For those with records, 134 (47%) met ATS/IDSA pulmonary NTM disease criteria for a minimum overall 2-year period prevalence of 8.6/100,000 persons, and 20.4/100,000 in those at least 50 years of age within the Portland region. Case subjects were 66 years of age (median; range, 12-92 yr), frequently female (59%), and most with disease caused by Mycobacterium avium complex (88%). Cavitation (24.5%), bronchiectasis (16%), chronic obstructive pulmonary disease (28%), and immunosuppressive therapy (25.5%) were common. Eighty-six percent of patients meeting the ATS/IDSA microbiologic criteria for disease also met the full ATS/IDSA disease criteria.

CONCLUSIONS:

Respiratory NTM isolates frequently represent disease. Pulmonary NTM disease is not uncommon, particularly among elderly females. The ATS/IDSA microbiologic criteria are highly predictive of disease and could be useful for laboratory-based NTM disease surveillance.

PMID:
20508209
DOI:
10.1164/rccm.201003-0503OC
[Indexed for MEDLINE]

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