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Occupational asthma to caddis flies (Phryganeiae)
  1. David Miedinger1,
  2. André Cartier1,
  3. Samuel B Lehrer2,
  4. Manon Labrecque1
  1. 1Department of Chest Medicine, Hôpital du Sacré-Cœur, Montreal, Quebec, Canada
  2. 2Tulane University Medical School, Department of Medicine, Clinical Immunology, Allergy, & Rheumatology, New Orleans, Louisiana USA
  1. Correspondence to Manon Labrecque, Department of Chest Medicine, Hôpital du Sacré-Cœur, 5400, West Gouin, Montreal, QC H4J 1C5, Canada

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In a previous issue of this journal, Kraut and colleagues (Occup Environ Med 1994;51:408–13) reported occupational allergies to caddies flies in the workforce of a hydroelectric power plant. In this survey a significant cross-shift change in forced expiratory volume in 1 second (FEV1) of one sensitised individual was interpreted as occupational asthma (OA) to caddis flies. However pre- and post-shift measures of FEV1 are not recommended to either confirm or refute OA.1 2 We herein report the first case of OA to Phryganeiae confirmed objectively by a specific inhalation challenge using an extract of these insects.

An engineer started working for an electric power company 7 years ago carrying out repair and maintenance works. …

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  • Competing interests None.

  • Provenance and peer review Not commissioned; externally peer reviewed.