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Algae-induced occupational asthma in a thalassotherapist
1Hôpital Laval, Centre de Pneumologie, Sainte-Foy, Québec, Canada. lpboulet@med.ulaval.ca
Occupational Medicine (Oxford, England)
|May 31, 2006
Summary
Algae powder exposure can cause occupational asthma (OA). A case study showed a patient developed OA after inhaling algae powder during thalassotherapy, confirmed by bronchial provocation tests.
Area of Science:
- Environmental Medicine
- Occupational Health
- Pulmonology
Background:
- Algae powders are increasingly utilized in therapeutic applications.
- The potential of algae powders to induce occupational asthma (OA) requires further investigation.
Observation:
- A 33-year-old female patient developed asthma symptoms subsequent to exposure to algae powder during thalassotherapy.
- The patient exhibited positive patch tests for nickel and cobalt and demonstrated moderate airway hyperresponsiveness.
- Bronchial provocation tests (BPT) were conducted to assess the respiratory response.
Findings:
- Bronchial provocation tests revealed an isolated early asthmatic response after a one-minute inhalation of dry algae powder.
- A significant 50% fall in forced expiratory volume in 1 second (FEV(1)) was observed post-exposure.
- Control BPT using lactose powder yielded negative results, indicating specificity to the algae powder.
Implications:
- This case highlights algae powder as a potential inducer of occupational asthma.
- Sensitization to algae proteins or absorbed metal contaminants may be responsible for the observed asthmatic reactions.
- Further research is warranted to understand the mechanisms and prevalence of algae-induced OA in occupational settings.
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