M.R. Holt, S.H. Kasperbauer, C.L. Daley
European Respiratory Journal 2020; DOI: 10.1183/13993003.02196-2019
The recommended procedure for diagnosis of nontuberculous mycobacterial pulmonary disease (NTM-PD) is collection of three sputum samples on separate days [1]. Sputum induction is suggested for patients unable to expectorate spontaneously. These recommendations align with evidence-based guidelines for pulmonary tuberculosis (TB) [2] but literature supporting their applicability to NTM-PD is lacking. In addition, the clinical utility of colony counts on solid media requires clarification. Early changes in semiquantitative colony counts are predictive of clinical and radiological improvement and treatment success [3] but the relationships of colony count with disease markers, such as smear status, have not been reported.
Footnotes
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Conflict of interest: Dr Holt has been an investigator in Insmed studies, outside the submitted work.
Conflict of interest: Dr Kasperbauer reports personal fees from Insmed, outside the submitted work.
Conflict of interest: Dr Daley has nothing to disclose.