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Hypersensitivity pneumonitis associated with environmental mycobacteria.
William Beckett1, Michael Kallay, Akshay Sood
1Pulmonary and Critical Care Division, Occupational Medicine Program and Finger Lakes Occupational Health Services, University of Rochester School of Medicine and Dentistry, Rochester, New York 14642, USA. Bill_Beckett@urmc.rochester.edu
Environmental Health Perspectives
|June 3, 2005
Summary
A machine operator developed hypersensitivity pneumonitis from workplace metalworking fluids contaminated with Mycobacterium. Removing him from exposure stabilized his lung function, highlighting occupational risks.
Area of Science:
- Occupational Health
- Pulmonary Medicine
- Environmental Health
Background:
- Hypersensitivity pneumonitis (HP) is an immune-mediated lung disease.
- Occupational exposures, including to metalworking fluids, are known causes of HP.
- Early diagnosis and removal from exposure are crucial for managing HP.
Observation:
- A machine operator in an automotive factory presented with respiratory symptoms.
- Pulmonary function tests and lung biopsy confirmed hypersensitivity pneumonitis.
- The illness was linked to exposure to metalworking fluids in his work environment.
Findings:
- Reexposure to metalworking fluids led to symptom recurrence and further lung function decline.
- Investigation revealed Mycobacterium chelonae (or Mycobacterium immunogenum) contamination in workplace metalworking fluids.
- Complete removal from exposure resulted in stable lung function.
Implications:
- Metalworking fluids can harbor microorganisms causing occupational lung disease.
- Prompt identification and mitigation of workplace exposures are essential for preventing severe lung damage.
- This case underscores the importance of monitoring and controlling microbial contamination in industrial fluids.