Asthma bronchiale can be one of the symptoms of food allergy. If the patient gets into contact with a food which causes difficulties in his occupation and if this food is the cause of asthma, occupational asthma bronchiale is involved. Of all cases of asthma occupational accounts for 2–20% cases. Noxious substances which cause occupational asthma are described in the literature and their number is as high as ca 250. The most frequent harmful substance causing occupational asthma is flour, therefore bakers and confectioners are most frequently affected. In a submitted case-report the authors describe the procedure used for assessment of the diagnosis and its importance for clinicians. The greatest benefit of the diagnosis of occupational asthma is the possibility to use restriction of the noxious substance within the framework of therapy. The patient’s condition thus improves without long-term medication.

        Key words: food allergy, causes of occupational asthma, causal noxious substances, assessment of diagnosis, therapeutic application