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Quaternary ammonium compounds and occupational asthma.
A Purohit1, M C Kopferschmitt-Kubler, C Moreau
1Service de Pneumologie, Hôpital Lyautey, Hôpitaux Universitaires de Strasbourg, France.
International Archives of Occupational and Environmental Health
|September 28, 2000
Summary
Occupational asthma can be caused by quaternary ammonium compounds, commonly found in disinfectants. This study highlights three cases in nurses, confirming a link between benzalkonium chloride exposure and asthma symptoms.
Area of Science:
- Occupational Health
- Toxicology
- Respiratory Medicine
Background:
- Quaternary ammonium compounds (QACs) are widely used as disinfectants and preservatives.
- Benzalkonium chloride is a common QAC with potential respiratory health risks.
- Occupational asthma due to QACs is infrequently reported.
Observation:
- Three female nurses developed asthma symptoms after handling benzalkonium chloride-containing disinfectants.
- Peak expiratory flow rate (PEFR) declined during work exposure.
- Bronchial challenge tests confirmed sensitivity to benzalkonium chloride but not to placebo or QAC-free disinfectants.
Findings:
- Benzalkonium chloride exposure is a likely cause of occupational asthma in healthcare workers.
- Diagnostic challenge tests confirmed the link between QAC exposure and asthma symptoms.
- The mechanism underlying QAC-induced asthma remains unclear.
Implications:
- Increased awareness of QACs as a potential occupational asthma trigger is needed.
- Healthcare facilities should consider QAC exposure in asthma evaluations for employees.
- Further research into the pathogenic mechanisms of QAC-induced asthma is warranted.