Hot-tub lung

Definition

Hot-tub lung is a form of hypersensitivity pneumonitis caused by inhalation of aerosolized water contaminated with non-tuberculous mycobacteria (NTM). It leads to inflammation of the lung tissue and can cause symptoms like cough, fever, and shortness of breath.

5 Must Know Facts For Your Next Test

1. Hot-tub lung is associated with exposure to hot tubs, spas, or indoor pools where NTM can proliferate.
2. The condition is an example of Type III hypersensitivity reaction involving immune complex deposition in the lungs.
3. Diagnosis often involves radiographic imaging, pulmonary function tests, and identification of NTM in respiratory samples.
4. Treatment typically includes avoiding exposure to the source and may require corticosteroids or other anti-inflammatory medications.
5. Symptoms can mimic other respiratory conditions such as pneumonia or chronic obstructive pulmonary disease (COPD), making accurate diagnosis crucial.

Related terms

Non-tuberculous mycobacteria (NTM): A group of mycobacteria that do not cause tuberculosis but can cause a variety of infections.

Hypersensitivity pneumonitis: An inflammatory syndrome affecting the lungs due to repeated inhalation of environmental antigens.

Type III hypersensitivity reaction: An immune response involving the formation of antibody-antigen complexes that deposit in tissues causing inflammation.