Non-tuberculous mycobacterial pulmonary disease
S.Â Cowman,Â J.Â van Ingen,Â D.Â Griffith,Â M.R.Â Loebinger
European Respiratory JournalÂ 2019;Â DOI:Â 10.1183/13993003.00250-2019
Nontuberculous mycobacterial pulmonary disease (NTM-PD) is a challenging infection which is becoming increasingly prevalent, particularly in the elderly, for reasons which are unknown. Whilst underlying lung disease is a well-established risk factor for NTM-PD, it may also occur in apparently healthy individuals. No single common genetic or immunological defect has been identified in this group, and it is likely that multiple pathways contribute towards host susceptibility to NTM-PD which further interact with environmental and microbiological factors leading to the development of disease.
The diagnosis of NTM-PD relies on the integration of clinical, radiological and microbiological results. The clinical course of NTM-PD is heterogeneous, with some patients remaining stable without the need for treatment and others developing refractory disease associated with considerable mortality and morbidity. Treatment regimens are based on the identity of the isolated species, drug sensitivity testing (for some agents) and the severity of disease. Multiple antibiotics are typically required for prolonged periods of time and treatment is frequently poorly tolerated. Surgery may be beneficial in selected cases. In some circumstances cure may not be attainable and there is a pressing need for better regimens to treat refractory and drug-resistance NTM-PD.
This review summarises current knowledge on the epidemiology, aetiology and diagnosis of NTM-PD and discusses the treatment of two of the most clinically significant species, theÂ M. aviumÂ andÂ M. abscessusÂ complexes, with a focus on refractory disease and novel therapies.
This manuscript has recently been accepted for publication in theÂ European Respiratory Journal. It is published here in its accepted form prior to copyediting and typesetting by our production team. After these production processes are complete and the authors have approved the resulting proofs, the article will move to the latest issue of theÂ ERJÂ online. Please open or download the PDF to view this article.
Conflict of interest: Dr. Cowman has nothing to disclose.
Conflict of interest: Dr. van Ingen has nothing to disclose.
Conflict of interest: Dr. Griffith reports grants, personal fees and non-financial support from Insmed Inc, outside the submitted work.
Conflict of interest: Dr. Loebinger reports personal fees from Insmed, personal fees from Savara, outside the submitted work.
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