[Hypersensitivity pneumonitis and abscess reaction to nontuberculous mycobacteria acquired form jacuzzi aerosol]

Abstract

Introduction: Mycobacterium avium complex can be responsible for a number of different radio-clinical presentations, ranging from invasive infections to hypersensitivity pneumonitis due to repeated inhalation of antigens. The diagnosis of hypersensitivity pneumonitis is clinical, radiological, biological and microbiological.

Case report: A 61-year-old male developed a hypersensitivity pneumonitis reaction to non-tuberculous mycobacteria, following the repeated use of his own spa, which later evolved into chronic respiratory failure. The diagnosis was made via an environmental analysis. Immunosuppressive treatment comprising corticosteroids and methotrexate led to moderate improvement, but may also have been responsible for the development of a M. intracellulare abscess. Despite 12 months of well-conducted antibiotic treatment, the evolution was unfavourable, with a relapse of a M. intracellulare infection three months after the end of treatment, followed by the patient's death.

Conclusion: Hypersensitivity pneumonitis reaction to non-tuberculous mycobacteria should be considered in patients who have their own spa. In the absence of microbiological identification, environmental analysis may guide the diagnosis. A fatal evolution of PHS is infrequent but prognosis may depend on the degree of associated fibrosis.

Keywords: Hot tub lung; Hypersensitivity Pneumonitis; Mycobacterium intracellulare; Mycobacterium intracellulare, Maladie des jacuzzis; Mycobacterium avium complex; Mycobactérie non tuberculeuse; Non-tuberculous mycobacterium; Pneumopathie d’hypersensibilité.