Mycobacteria as a Cause of Hypersensitivity Pneumonitis in Metal Workers
Author Information
Author(s): Brian G. Shelton, W. Dana Flanders, George K. Morris
Primary Institution: PathCon Laboratories
Hypothesis
Aerosolized mycobacteria colonizing metal removal fluids likely cause hypersensitivity pneumonitis in workers.
Conclusion
The study suggests a possible association between mycobacteria and hypersensitivity pneumonitis in metal workers exposed to contaminated fluids.
Supporting Evidence
- High airborne concentrations of mycobacteria were documented in the workplace.
- Six out of seven facilities with known HP had mycobacteria present.
- Outbreaks of HP in hot tubs have been linked to mycobacteria.
Takeaway
Some workers who use special cutting fluids may get sick from tiny germs called mycobacteria that live in those fluids.
Methodology
The study involved case reports and retrospective review of samples from metal working facilities.
Limitations
The data is based on existing records and not a prospectively designed study.
Participant Demographics
The cases reported involved male workers, primarily middle-aged.
Statistical Information
P-Value
0.01
Confidence Interval
1.5-2194.47
Statistical Significance
p = 0.01
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