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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Miedinger et al. (2010) studied this question.
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