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For further information, see CMDT Part 9-32: Occupational Pulmonary Diseases

Key Features

  • Estimated 2–5% of all asthma cases are related to occupational factors

Clinical Findings

  • Dyspnea, wheezing, and/or cough that correlate with the workplace

  • Patients often report feeling better in the evenings or during weekends and vacations


  • Requires a high index of suspicion and a careful history of workplace exposures

  • Spirometry before and after exposure to the implicated substance

  • Peak flow measurements at and outside of the workplace

  • Bronchoprovocation testing is helpful in some cases


  • Bronchodilators

  • Avoidance of further exposure to the offending agent

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